Source: Engadget.com
26.01.12
Microsoft paid Nokia $250 million to adopt Windows Phone!
Source: Engadget.com
04.01.12
The winner of Final Cut Pro X is...
28.10.11
Apple iPhone 4S
Visually identical to the previous iPhone 4, all the new goodies to be found on Apple's latest smart phone are lurking beneath the surface, in the form of clever new software and improved hardware. But is a little tinkering under the hood enough to keep Apple on top, or are you better off this time around with an Android mobile?
The iPhone 4S is available to buy direct from Apple or any of the main phone networks and retailers from $199 with a network carrier.
Should I buy the iPhone 4S?
The iPhone 4S is the pinnacle of smart phone excellence, but it's not as far ahead of the curve as the iPhone 4 was when it launched last year.
So if you own an iPhone 3G, 3GS or an older mobile, the iPhone 4S is a tremendously tempting option. If you do upgrade, the step-up in processing power, camera tech and especially the pin-sharp retina display will have you gawking at your mobile like a child who's found his favourite flavour crayon.
If you already own an iPhone 4 or high-end Android smart phone such as the Samsung Galaxy S2 or the HTC Sensation, however, the decision is much trickier. Voice recognition, a snappier processor and an improved camera are the shiniest lures, and we don't think they're shiny enough to warrant spending £500.
If you already own an iPhone 4, updating to iOS 5 will make your mobile feel refreshed, and will flood your phone with enough new features to boost its usefulness for the forseeable future.
iOS 5
We think the most important thing about the smart phone you buy is its operating system, because more than anything that determines what you can do with it. The iPhone 4S comes with iOS 5, the newest version of Apple's mobile operating system. So what do you get?
The basic iOS experience is unchanged for iOS 5. Apps are layered across homescreens in neat grids of 16 -- you swipe left and right to browse through them and tap on an app to open it, with your four most-used staying put at the bottom. Double-tap the home button and a taskbar pops up showing you all the apps that are running, and from here you can close them down or quickly skip back and forth between them.
New notifications
The notification pane is new, however. Shamelessly lifted from Google's Android operating system, swiping down from the top of the screen will conjure up a panel displaying everything new that's happening on your mobile, including texts, email and calendar updates.
You can also stick some widgets into this pane, such as weather updates or stocks (we've still got no idea why every new gadget comes with a built-in stock-market ticker, but if you happen to own an impressive portfolio you might find it useful). Tapping on a notification will spirit you away to the relevant app, and there's a tiny x next to each one when you want to dismiss it.
The panel is attractive, simple enough to use, and it makes dealing with notifications from various apps much easier than on previous version of iOS. You can customise which apps appear in the notification pane and how they behave from the settings menu.
Notifications aren't restricted to that brand new panel. If you get a notification from one of your apps (a mention on Twitter or being tagged in a photo on Facebook, for example) while you're using the phone, a small box will roll down from the top of the screen letting you know what's what. It's much less intrusive than older versions of iOS, which required you to dismiss a distracting pop-up warning every time something happened.
Twitter is now baked into the software, so you can do things like tweet photos from your camera roll. That's great if you use Twitter, but if you don't, the option will likely just take up space and annoy you.
iOS 5 could save you a few pennies thanks to a service called iMessage. This is a messaging system exclusively for people who are using devices running iOS 5, and unlike text messages it's completely free. It's not a separate app -- the iPhone will figure out whether an iMessage is coming from someone in your contacts and display the messages in the same conversation view as your normal texts, but tinted blue so you can tell iMessages from SMS.
iCloud
With iOS 5, Apple is finally releasing the iPhone from the fierce clutches of its desktop iTunes software, instead letting you store your email, contacts, calendars, reminders, Safari bookmarks, notes, documents and -- best of all -- photos online.
Dubbed iCloud, this slew of storage options ties almost everything on your iPhone to your Apple account, and backs up your iPhone wirelessly while your phone is locked and connected to the Internet over a Wi-Fi connection. In the future you'll also be able to update your iPhone's software wirelessly, without having to plug it into your computer.
One good thing about iCloud is that if you've got other iOS devices, you can get all your photos and data on to them wirelessly, downloading them from Apple's cloud storage once they've been uploaded to iCloud from one device. It also offers peace of mind, because if your mobile breaks it doesn't mean all your data is lost.
We had a few issues with iCloud in the short time it's been available, with an older iPhone 4 unable to access the service, with attempts yielding only unhelpful error messages. It seems to have settled down since though, so we think these issues were likely teething problems caused by Apple fans around the world rushing to join the service -- we will of course update this review to reflect our ongoing experiences with iCloud.
Other additions in iOS 5 include a camera shortcut from the lock screen (double-tap the home button) and a grid that appears over the camera's display to help you line up your photos, and a simple photo editor appears when you've taken a shot.
The volume up button now lets you take pictures while you're using the camera app, which cuts down on fumbled attempts to hit the on-screen capture button, and makes it easy to take self-shots because your digits can reach the mechanical button while the iPhone's display is turned away from you.
iOS has the best app offering of any operating system. There are hundreds of thousands available, and because Apple tests each app before making it ready for download, the quality in general is very high, with addictive, polished mobile games being a particular strong point.
iOS 5 is the best-looking version of iOS yet, and the polish that Apple has applied to every single menu and button means swooping around the iPhone 4S is a joy. It's worth noting, however, that with this host of new features, iOS is creeping away from what made it so appealing in the first place -- being so simple anyone could use it.
While still less complex than some rival operating systems, we can imagine someone new to iOS feeling flummoxed by the new notification pane, the options to tweet and print photos, or how exactly to access their stuff through iCloud.
The Settings app is still particularly weak as well -- diving into the settings menu every time you want to turn Wi-Fi on or off is way more hassle than it should be, and figuring out where things belong in the maze-like and ambiguous 'general' tab still induces headaches.
Siri
All the new features we mentioned above are available to the older iPhone 4 and iPhone 3GS as well as the iPhone 4S. So what reason is there to opt for the 4S?
Apple wants you to get excited over Siri, a voice-controlled assistant that lives exclusively on the iPhone 4S. You conjure this robotic PA by holding down the home button, and then barking an order into the 4S when the microphone icon appears.
Siri is more sophisticated than most voice-control apps, wrapping its bionic brain around complex phrases such as, "What's £50 in US dollars?" or, "Do I need a raincoat today?"
But in our experience, asking anything beyond those limited stock phrases is likely to yield disappointment, or public embarrassment. We were occasionally impressed -- we asked "Will I need an umbrella this time next week?" and Siri sussed the date in question and provided weather forecasts for the next seven days.
But for the most part, Siri just offered to perform Web searches for the questions we'd issued, and much of the time it didn't even manage to accurately figure out what we were saying. Ambient noise like other people chattering in our vicinity also made it hard for Siri to tell when we were finished issuing a command.
Here in the UK, Siri is even more hamstrung, because Apple doesn't have a deal with any UK providers of local information. So if Siri thinks you're trying to find a particular kind of shop or nearby locale, it'll tell you that it can only do that in the US. That's unhelpful and annoying.
Setting up calendar events proved to be a strong point for Siri, but that's one of the easiest tasks to perform using the Calendar app, with just a few pokes at the 4S' touchscreen.
Ultimately Siri impressed us too rarely, and we don't think its voice-recognition tech is accurate, reliable or useful enough to make it preferable to just opening other apps and sorting stuff out yourself. This is a shame, as we had high hopes for a voice-recognition tool that would blow every previous failed attempt out of the water.
So Siri isn't great, but the voice recognition tech on board the 4S comes into its own in other areas -- you can dictate text messages or notes, and unlike Siri, we can see this actually making your life easier.
Design
Anyone who's held an iPhone 4 will be au fait with the iPhone 4S' design, because it looks almost exactly the same as its predecessor. While it makes the iPhone 4 and the 4S hard to tell apart, the lack of a new look is not necessarily a bad thing, because this classy slab of gadgetry is still one of the best-looking phones in the business.
A slab of glass adorns the back of the 4S, while a rounded metal band along the edges lends this phone an industrial, modern look. Once the iPhone's button selection looked sparse -- the big 'home' button bang in the middle, circular volume buttons, a switch to turn the phone to silent and a lock key on the top are still all you get. In the last year rival manufacturers have opted for a similarly minimalist style, so the 4S doesn't look as singular as previous iPhones did at the time.
The volume buttons and mute switch have been altered slightly from the iPhone 4, with all three buttons moved down a few millimetres. As a result it's possible that iPhone 4 cases won't all fit the iPhone 4S, if the case is particularly snug around these keys. Most cases have a gap for all the buttons, so should be fine.
One gripe we'd level at the 4S is that it's very fragile. We've had over a year with the iPhone 4, and in that time we've seen more than our fair share of cracked casings and shattered screens. With the same design, the iPhone 4S will suffer just as much if you knock it off a table or leave it in the hands of a destructive toddler.
In conclusion, it's a shame that your mates and jealous commuters won't be able to tell immediately that you're carrying the latest tech, and the fragile casing could lead to tears, but this is still a deliciously classy phone, and one you should be proud to fill your pockets with.
Battery
Even the most sophisticated smart phone isn't much cop if it can't survive without sucking on its charging cable, so how does the 4S fare away from the mains?
With what we'd consider normal-to-heavy usage -- that is, brightness turned to full, intermittent Web browsing over both 3G and Wi-Fi, some time spent downloading and playing games and about 50 minutes of streaming YouTube video -- the 4S' battery ran down to 27 per cent from a full charge after 6 hours and 18 minutes.
We don't expect you'll end up using your 4S that much every day though. Based on our experiences, with moderate use the 4S will likely last you through to the end of the day. If you find the battery is draining too quickly, try turning off services you don't use, and checking which apps are monitoring your location in the settings menu, as this could be guzzling through your reserves.
We tried to burn through the 4S' battery as quickly as we could, by running graphically intensive 3D games Infinity Blade and Real Racing 2. The battery died after a little more than 3 hours, so consider that an approximate minimum life expectancy. We also noticed the 4S got very warm while it was running these games -- a sign that its processor is working hard.
These results are in line with our expectations -- we've yet to see a high-spec smart phone that can last more than a day or two away from the mains. We expect you'll need to charge the iPhone 4S every night to ensure it makes it through a full day, particularly if you're fond of downloading things or playing intensive games.
So far the 4S' battery appears to offer similar survivability to the iPhone 4. Indeed, the battery unit inside the 4S is very similar to that of its predecessor.
Conclusion
When the iPhone 4 was released it blew our socks clean off our feet, and caused rival manufacturers to scrabble frantically back to the drawing board, desperate to conjure up something equally cool and impressive. In short, it was way ahead of the curve.
The iPhone 4S is still ahead of the competition, but the gap has narrowed significantly, with Android and even Windows Phone devices becoming slowly more accessible and stylish.
Taking the wider view of the tech industry, it's unclear whether the iPhone 4S is enough to keep Apple on top for another whole year. But forget navel-gazing -- right now we reckon this is the best smart phone out there.
It's a cracking little gadget and it's loads of fun to use, offering more apps, games and multimedia than you can shake a stick at. It's not nearly as striking as its predecessor was, but if you're on the hunt for a powerful, easy to use mobile, this should be your first choice.
27.10.11
Canon EOS 1D X
The Canon EOS-1D X Digital SLR Camera is designed with the pro shooter in mind, as evidenced by its tough magnesium alloy body, large 3.2" LCD, the Intelligent Viewfinder, and of course the 18.1Mp CMOS sensor, among other professional features. If you're looking for a tough rig that knows what a photographer wants and needs, then Canon answers the call with this impressive offering.
The EOS-1D X was built to stand up to the grind of daily shooting. In addition to its large pixel size - for outstanding still images and 1920 x 1080 video - the camera provides the serious photographer with a generous ergonomic design, along with smart layout of the controls. Dual CF card slots ensure that every shot can be captured, while the Gigabit Ethernet terminal and the WFT-E6A Wireless File Transmitter and the GPS connection provide quick connectivity for file sharing on the fly. What's more, the magnesium alloy body is dust and weather resistant, and features shutter durability of up to 14 fps for up to 400,000 cycles - allowing you to do your job without hesitation, or worry.
The EOS-1D X's 18.1Mp CMOS sensor is a full 24 x 36mm frame sensor, capturing 5184 x 3456 images. That translates into high-quality, JPEG and RAW images, to impress even the most demanding shooters. The camera also provides 14-bit processing and a standard ISO range of 100-51200, with expanded sensitivities of 50 to 102400 and 204800. All of this is made possible by the camera's Dual DIGIC 5+ Image Processors, which enable a 17x faster processing speeds and greater noise reduction, among other duties.
When it comes to auto focus, the 61-Point High Density Reticular AF ensures fast, accurate image capture thanks to its Offset Array Sensor. With a multitude of ways in which to enable AF you can quickly access your desired point selection for your exact situation. Another tool for dead-on images is the EOS iSA (Intelligent Subject Analysis System). This sensor has 252 zones general metering and 35 zones for low-light metering. By incorporating face and color recognition data the system is stable even under rapidly changing lighting conditions. In addition, the E-TTL flash metering benefits from these improvements as well.
Like most all pro DSLRs these days, the EOS-1D X provides you with 1920 x 1080 HD video capture. The camera offers both ALL-I and IPB compression, supports H.264/MPEG-4 AVC High Profile, and automatically splits files greater than 4GB for extended recording up to 29:59 minutes without interruption. The camera also offers up Live View, a 64-step volume control, a sound recording level meter, and a Quick Control Dial which allows for silent adjustments - using the dial's touch pad - during shooting.
Text & Photo: Daniel Hjorth
25.09.11
06.07.11
Minox DCC 5.1 Gold Edition: World´s cheapest gold camera?
Feeling a little nostalgic for that classic rangefinder camera you never owned (but wished you had)? The DCC 5.1 Digital Camera (Gold Edition) is a miniscule (2.9 x 1.8 x 1.7"), flyweight (under 4 oz) digital camera that looks like a classic German rangefinder camera--with the added cachet of being 24K gold-plated. It has a detachable shoe-mounted metal design viewfinder designed to give the look and feel of the classic tradition.
On the inside, it's a thoroughly modern digital camera--a 5.1MP CMOS sensor, 2" LCD display screen, 9mm (43mm equivalent) glass f/2.0 lens, and QVGA (320 x 240 pixels) video capability. It has 128MB of internal memory, accepts SD cards up to 16GB for external memory, and operates on 1 rechargeable lithium-ion battery. Warning: once you pick this beauty up, it's hard to put it down.
Sources: Minox and B&H Photo Video
05.07.11
Nikon D5100
Nikon's D5100 Digital SLR Camera has a galaxy of professional features not commonly found in a consumer digital camera. A high-resolution 16.2MP DX-format CMOS sensor and an EXPEED 2 image processing engine guarantee superb quality and high performance. The 3.0" vari-angle tilting LCD monitor allows you full freedom in composition with sparkling 921,000-dot resolution. Full 1920 x 1080p video with full-time autofocus (for tracking subjects in motion) and stereo sound (using an optional microphone) is always available with in-camera editing and creative controls to activate your inner movie director.
The Effects mode provides a dazzling array of special effects for putting your individual stamp on all of your images--still photos or video. Selective Color, for instance, isolates any color within a scene, and Night Vision captures details in places too dark for your own eyes. High Key effect will create bright, glowing images filled with atmosphere and mystery, or you can emphasize the mood of a scene using Low Key, or try out Miniature Effect--which produces a scene that looks like a miniature scale model.With sensitivity ranging from 100 to 6400 ISO, you'll be able to make photos and videos that are amazingly rich, even in low light. In-camera HDR (High Dynamic Range) mode will tame high contrast situations by automatically capturing multiple exposures of the scene and combining them for vastly improved contrast and low noise. A blazing fast 11-point autofocus system and split-second shutter response mean that you won't miss photo opportunities waiting for your camera to catch up. The built-in speedlight has i-TTL for accurate, well-balanced flash every time.
With the Scene Recognition system, 420-pixel RGB 3D Color Matrix Metering II, 16 automatic exposure scene modes, and Active D-Lighting, your control over your photos and movies will be more precise and simple to carry out than ever. And you don't need to worry about dust ruining an image--the automatic image sensor cleaning function has it under control.Sources: www.nikon.com and www.bhphoto.com
Hasselblad H4D-200MS
The Hasselblad H4D-200MS Digital Camera builds on the popularity of the company's H4D-50MS, with the addition of multi-shot capture technology which renders impressive 200Mp photos. Using this mode, the camera takes 6 shots to deliver the utmost in fine imaging with images that boast spectacular detail and uncompromised quality. The 50Mp sensor is mounted onto the Hasselblad patented symmetrical multi-shot frame, which positions the sensor with sub-micron accuracy using piezo-electrical actuators. Bayer-patterned pixels are used to create the jaw-dropping 200Mp capture. The H4D-200MS also captures in normal single-shot, at 50Mp for live subjects, and in multi-shot capture for 50Mp, with 4 shots, for increased detail of still subjects.
The 36.7 x 49.1mm imaging sensor produces images with the industry staple 6 x 4.5cm 'negative'. Working with a window of this size gives the photographer more latitude in post-production or when composing. Additionally, Digital Lens Correction (DAC) enters the mix to perfect already stunning images. When the images are processed with the included Phocus software, the DAC removes chromatic aberration, distortion, and vignetting. Phocus, the chosen software of Hasselblad, works with both Mac or PC machines, making professional workflow seamless, no matter which operating system the photographer is running.
The H4D-200MS is versatile. In the way of lens choices - using the H System Mount - all lenses of the H system line can be used with the camera. The H system lens line uses central lens shutters, which allows a flash to be used at shutter speeds up to 1/800 second. On the H4D-200MS, that means a flash or strobe can be synced with the camera at every shutter speed up to 1/800th. Another option that is possible with the 200MS is digital capture with a view camera, using an H system adapter. Numerous accessory options help to configure the H4D-200MS just the way the photographer wants it.
Source: www.HASSELBLAD.se
Source: www.HASSELBLAD.se
Leica M9-P Overview
Leica has announced the M9-P, a variant of its 18MP full-frame M9 rangefinder camera. The P version gains the sapphire crystal LCD glass previously seen on the Leica M8.2 but now featuring improved anti-reflective coatings for improved visibility in difficult lighting conditions. In order to give an understated appearance, the M9-P omits the traditional Leica red dot and M9 designation from the front of the camera, instead the Leica name is engaved in the metal top-plate in the company's traditional script.
Leica today presents a new version of the world's smallest, full-frame digital system camera: the Leica M9-P. This new model will sit alongside the Leica M9 in the company's rangefinder portfolio, providing an alternative, even more discreet and resilient design that further reinforces the quintessential nature of the M9 – and particularly meets the needs of professional photographers. The new model will be available in a classic silver chrome or subtle black paint finish.Offering the same technical specifications as the highly successfully Leica M9, the M9-P combines all the benefits of the original: compact size, full-frame, 18 megapixel 24 x 36mm sensor (35mm format), sophisticated image processing and robust construction, with features designed for the professional user or photographers who prefer a pure, even more unobtrusive styling.
The Leica M9-P includes a scratch-resistant, sapphire crystal covering on the LCD screen. This material is so tough that the screen can only be produced using special diamond cutting tools and is one of the world's hardest materials. As a result, the sapphire glass LCD cover is extremely resistant to wear and almost unbreakable, meaning many years of reliable use. In addition, thanks to an anti-reflective coating on both sides of the cover, reviewing images on the display during composition and after capture is further improved, particularly in unfavourable lighting conditions.
The external covering of the body of the M9-P, finished in vulcanite leatherette, features a more coarselytextured finish that ensures a steady grip when shooting, making the M9-P feel particularly safe and secure in the hand.
A further understated feature of the Leica M9-P is its minimalist styling, which is focused on the most essential features. Many professional photographers using Leica cameras have been known to tape over the Leica 'red dot' logo to make their equipment as inconspicuous and discreet as possible. For this reason, the Leica red dot logo and the M9 lettering on the front have been omitted. Instead, the top plate is engraved with the Leica name in classic script form.
Since 1954, the Leica M system has represented an unmistakable, individual kind of photography and a very conscious photographic style. With a Leica M, the photographer becomes a 'part of the action' in the process of capturing challenging, authentic and creative images.
The rangefinder frames precisely the shot the photographer envisages, while allowing a clear view of the scene outside the viewfinder frame. This allows the photographer to predict the decisive moment and capture it discreetly and reliably at the right moment – in all fields of photography, from photojournalism, reportage and 'available light' to the capture of portraits and aesthetic, fine-art images.
Another significant advantage for unobtrusive photography is the almost silent shutter, a feature of both the M9 and M9-P. Moreover, when longer exposure times requiring an extremely steady camera stance are essential, only a slight pressure on the shutter release button in 'soft release' mode is required. Photographers can also select the most appropriate moment for re-cocking the shutter.
The functions of the Leica M are consistently constructed for extreme durability and a long working life. The highest quality materials, intricate manufacturing processes and meticulous manual assembly at Leica's facility in Germany guarantee functional reliability for years to come.
In line with Leica's commitment to system compatibility, almost all Leica M lenses built since 1954 can be used with the M9 and M9-P – an important factor in the enduring value of the M series. The 18 megapixel image sensor, specifically designed and developed for the M9, enables capture of the full 35mm film format without any compromise. All M lenses mounted on the M9 and M9-P therefore offer the same focal length as originally intended, and the enormous potential performance of the extensive M lens portfolio, with focal lengths from 16 to 135mm, can be fully exploited by both cameras.
Sources: www.leica.com and www.dpreview.com
03.07.11
Canon EOS 7D
Designed for pros and semi-pros alike, the Canon EOS 7D is a high-performance digital SLR, that features the resolving power of an 18-megapixel APS-C format CMOS sensor and dual DIGIC 4 image processors that enable 8 frames-per-second capture of high-definition, low-noise imaging at sensitivity levels up to ISO 12800.
In addition to high-definition still images the Canon EOS 7D can also capture true HD 1080p video at 30 frames per second. Video clips can be up to 12 minutes in length or 4GB in size, and you can make full use of all Canon EF and EF-S-mount lenses, which enables an exceptional range of creative visual possibilities. And to ensure clean, blemish-free image files, the 7D employs a dual dust-reduction system.
The EOS 7D's Intelligent Viewfinder enables 100% viewing of the total image area, and features a transparent LCD overlay option that enables advanced data display within the optical viewfinder including user-selected AF modes, a spot metering circle, and on-demand grid lines. In addition to the 7D's optical viewfinder a Live View mode enables you to compose, review, and edit images using the camera's 3", 920,000-dot TFT LCD. The 7D also features a Dual Axis Electronic Level and tilt display that enables you to adjust the roll and pitch of the camera in 1° increments, using the viewfinder or LCD.For continuous shooting sequences, the 7D can capture bursts of up to 126 JPEGs (large) when using UDMA CF memory cards, or 15 when shooting RAW files. An enhanced all cross-type 19-point autofocus system enables extremely accurate AI Servo AF subject tracking and user-selectable AF modes for precise focusing. For metering stills and video, the 7D features a new 63-zone iFCL metering system that takes focus and color data into consideration when establishing exposure times.
The Canon EOS 7D is constructed out of rugged magnesium-alloy and is sealed against dust and weather. The 7D's shutter is equally rugged and tested for up to 150,000 exposure cycles. Images can be recorded to Type I and II, UDMA-compliant CompactFlash cards in either sRGB or Adobe RGB, and you can expect up to 800 exposures per charge using the camera's rechargeable lithium-ion battery.
Sources: www.canon.com and www.bhphoto.com
Canon 17-40mm f/4 L USM
While an excellent ultra-wide zoom lens for film SLR cameras, the Canon EF 17-40mm f/4L USM Lens is especially well suited for use with EOS digital SLR cameras, which usually have an imaging sensor size smaller than the 35mm format. When used with such digital SLR cameras, the 17-40mm focal length range gives an angle of view approximately equivalent to that of a 27-64mm lens upon 35mm cameras, making it an ideal medium-aperture standard zoom lens.
The EF 17-40mm f/4L USM, like all of the Canon "L" lenses, delivers optical performance equal to similar fixed focal length lenses, with silent, high-speed focusing. Distortions and aberrations are remarkably small for a lens of such amazing capability. It combines 1 high-precision molded glass aspherical lens and 2 replica aspherical lenses to achieve the extended zoom range, while also correcting for common aberrations that arise during zooming. A Super UD (ultra-low dispersion) glass element minimizes the chromatic aberration of magnification which tends to occur with wide-angle lenses, to help eliminate color bleed along the edges of the subject and achieve high image contrast and resolution.
The 17-40's minimum focusing distance is just 11" (28cm) throughout its entire range of focal lengths, which makes it very useful for close-up work. All of the focusing and zooming action is done internally, with no changes of the size of the lens. It only uses lead-free optics to help the environment, and features a circular diaphragm for improved background blur. The housing is water and dust resistant to help ensure reliable performance for both professionals and enthusiasts. Like many "L" lenses, it uses 77mm filters, but also has a rear gelatin filter slot behind the lens mount.
This lens is a Canon 'EF' series lens, indicating it is for use with full-frame cameras. It works equally well with APS-C format DSLRs.
Sources: www.canon.com and www.bhphoto.com
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