What is an EVF?

EVF = Electronic View Finder.

Be ready to see this term used more and more, even for SLR cameras. Many a compact point-and-shoot photo camera already is equipped with an EVF, but it is most common in video cameras (and it has been for many years already). In the viewfinder, instead of looking at an image coming from a more or less complex optical system, your eye is pointed at a small LCD screen (or TFT, or OLED or whatever similar technology) reproducing the picture recorded by the CMOS imaging sensor of the camera.

After all, this is only what we already know well as the LiveView mode on the back LCD of nearly all the compact photo cameras (and many SLR too). But as a small picture in the viewfinder.

An LCD display + a viewing lens = an EVF.

In some case, you could add a small mirror for space reasons, but this is a minor variation to the original tune.

EVF and Single Lens Reflex (SLR) cameras

A Single Lens Reflex (SLR) photo camera is organized around a very mature technology in which a mirror reflects the image through an eyepiece via a pentaprism (or a penta-mirror) as in the drawing on the left.

Of course, as the film (film plane and focal plane shutter) is hidden by the mirror, this one must be drawn up to take the snapshot.

All this is greatly simplified when there is an electronic viewfinder.

Advantages and drawbacks

Advantages et gains from an electronic viewfinder

The first positive side is mechanical and optical: If you remove the mirror and the pentaprism, the architecture of the camera will be greatly streamlined, lightened and its manufacturing cost will go down. For three different reasons (at least):

• reduction of the number of parts
• reduction of the assembly complexity (or of the amount of human work needed)
• increased ease of calibration (alignment) of the optical parts (an LCD and an eyepiece, rather than a whole bunch of parts)

Even better, the disappearance of a huge articulated and mobile mechanical system brings several positive effects:

• increase of the continuous shooting speed/cadence (there’s so much less hardware to move around for a photo)
• reduction of shutter noise (in a traditional SLR camera, most of the noise actually comes from the mirror up-swing and the shutter operation; It’s worth removing one of them)
• a lighter mechanical structure through reduction of the quantity of parts and since the enclosure is lighter because it has less stress to sustain in all these shocks and moves

Also, the electronic viewfinder exactly reproduces what the sensor sees. A 100% optical coverage on a viewfinder of fully optical design has always been reserved to the most expensive SLR cameras. But when you get an EVF, 100% coverage is totally natural and effortless. Luxury comes to you in the clothes (and price) of entry level.

Then, having an LCD display brings the additional possibility of adding all the data you can think of. Many brands already experimented with this and brought us some Electronic Viewfinders with features like:

• Histogram
• Artificial Horizon
• Zoom on a part of the image
• Telltales and technical displays (aperture, speed, ISO, etc.)
• Active AF zones (including face detection)

As a matter of fact, there is no other limit than what a computer screen can display: Data, image, etc. It’s only a choice from the designer.

And it’s not even the end of it. The EVF also has a major advantage when light is low: As far as the sensor can see something, it’s only a matter of amplifying light signal (like for the ISO sensitivity selection) to make the picture readable. If the photo is possible (even barely possible), showing it is possible. Think about it! A nikon D3s digital sensor could display what it sees even in the darkest dawn it can manage. Since the digital noise is only a marginal issue on an LCD display (even at 3MP resolution), you can see what the sensor will be able to grab even in a room too dark for comfortable framing with an optical viewfinder.

If you compare it with the lowest-priced optical viewfinders of entry-level SLR cameras, the EVF is an easy winner in those low-light conditions: These simple viewfinders where already unpleasant and dark, the EVF bring a new life to cameras used indoors.

Drawbacks and limitations of the electronic viewfinder

But all is not pink and shiny. EVF have the same problems as most point-and-shoot cameras find on the rear-side LCD displays used for LiveView.

To start with, even if the electronic viewfinder (EVF) is intrinsically better protected against sunlight, it is still very sensitive to bright light issues. If there was only one thing that the EVF-sensor pair does not like, this would be high lights and bright sun (sic!) highlights are easily washed white and overblown. You will find more white flat areas than nice clear zones. The worst comes when you add high contrast to the picture. The EVF has a very small dynamic range (this is not HDR!) and the designer must choose between high-lights and dark areas.

We tend to forget it, but the human eye is amazingly sensitive and adaptable. Behind a prism and a mirror, in the brightest mid-day sun light, it can marvelously adapt to over-exposure situations that totally saturate the purely digital EVF system.

Best (or worse), the eye is extraordinarily able to switch within a few hundredth of seconds from the darkest night to the most violent lighting without even thinking about the marvelous brain processes involved. On the contrary, the EVF system uses a gain correction which will change at any time the apparent brightness to track the actual scene brightness. What is clearly an advantage in a dark room, forces the system to include an auto-adaptation feature which will change the brightness of the EVF several times per second. According to what you point the camera to, the electronic viewfinder will change from lighter to darker display. Not really a problem, but this asks for some tolerance to a process which is not natural to our human eyes. You have to get used to it.

Additionally, but this is all very sensitive to the user (you!), watching a computer screen may be more or less comfortable in the long run. As a matter of fact, if you use the EVF for long hours (this is the case for the professional photographer waiting in front of the Cannes Festival stairs, for the photo safari amateur or for the intensive tourist photographer willing to bring everything on a memory card – don’t laugh, I’m sure you shoot it as much as I do), you may come back with a serious headache. This is certainly not an issue for everybody (and you’re not supposed to keep the camera to your eye if you want to immerse yourself in your subject), but this may become a real limitation to some people. At the strict minimum, you must take very seriously the setting up of the dioptric correction of the eyepiece (much more seriously than on your current camera) to limit the impact to a tolerable level. Unfortunately, the eye seems to get more prone to this issue when the photographers gets older… Our eyes are not equal in front of photo gear. Too bad, but true.

Last but not least, even if the electronic viewfinders improve in time (and Sony has shaken the market with a 2.3-million-pixel EVF in the Sony SLT-A65 and in the Sony SLT-A77 which has raised the bar to a whole new level for all the competition), the fine quality of a focusing screen in a common optical viewfinder stays incomparably better than what the best EVF can display today. Far better! This is the reason why they generally include an additional Zoom feature allowing to better judge focus through enlarging an area (On the opposite, a company like Zacuto proposes an enhanced edge sharpening to make the focus analysis easier or more natural).

If you let your camera focus for you, honestly, you shouldn’t care much about this. If you like to fine-focus your pictures (all the more if you use a USM, SSM or similar lens which allows easy manual focus correction), if you use wide-aperture lenses (which call for a very attentive selection of the focus location or AF area), you will be in a living hell playing with buttons to merely focus while you were used to just looking at the image in your old optical viewfinder. Interestingly, Sony keeping in its technological portfolio the marvelous AcuteMate focusing glass surface (bought from Minolta and still widely considered as the absolute best here), is the first to jump to the next technology.

While we talking about AF, we must stop and remind ourselves that the disappearance of the reflex mirror means that focusing is now done from the data directly available on the image sensor. Where the traditional SLR camera focuses just before the exposure, using phase difference sensors (high precision, high speed, and not very complicated), the EVF viewfinder seems to enforce the use of automatic focusing using the measurement of a contrast difference directly on the image (very consuming in terms of processor power, intrinsically less reactive). Sony, once again at the forefront, chose to insert a semi-transparent mirror to keep the fast phase detection sensors. But they are quite alone in this decision – for now.

(Temporary?) conclusion

The electronic viewfinder is no panacea. But it brings good answers to tough questions asked by the old reflex technology, starting with price reduction for the digital photo cameras which is always a major issue for the manufacturers.

The camera owners already used to the optical viewfinder of entry-level cameras will immediately recognize the many advantages and all the more if they are occasional photographers or if they come from the compact point-and-shoot camera world.

Expert users (not even pros) will certainly have more mixed feelings, even if the most advanced electronic viewfinders like the recent Sony ones progressed in great strides. As I read in one of the recent articles about these new photo cameras, Sony brought enormous (not incremental) progress but this is still an electronic viewfinder. Not perfect, but with enough advantages to balance the drawbacks.

Now, you may have to read the post again to choose which ones are the most important for you. But there is a big problem left: We usually choose our photo camera inside a relatively dark shop (perfect, ideal conditions to demonstrate an EVF) and we use it mostly during our Summer holidays (the worst conditions to use an EVF). Some people may be unpleasantly surprised if they do not think twice before choosing a camera.

For 699€ (or $699), you will soon be able to buy (as early as June) the new DSLR from Sony, the Sony SLT-A35, Sony Alpha 35 or Sony α35 (depending on the exact name you want to use – this is still fuzzy for me). The main features are:

• New APS HD CMOS 16.2 MP digital sensor
• Continuous shooting at 5.5 frames/s
• Continuous shooting at 7 frames/s on the condition of working on a reduced sensor zone (magnification/electronic zoom of about 1.4x)
• Continuous AF in all conditions (including in LiveView and Full HD video) – Thanks to the semi-transparent mirror coming from the Alpha 33 and Alpha 55
• Fun “special effects”

There is also a very small NEX-series compact hybrid camera: NEX C3 (from $599).

Press Release at the bottom.

Sony SLT-A35 – Press Release

Sony Introduces α35 DSLR Camera with Leading Video and Still Performance Powered by Translucent Mirror Technology

Light, Compact Camera Delivers 16.2 Megapixels and New In-camera ‘Picture Effect’ Creative Capabilities

SAN DIEGO, June 8, 2011 — Light, compact and easy to use, Sony’s new α35 (SLT-A35) interchangeable lens camera brings pro-style shooting speeds and diverse creative options to photographers of all abilities.

Building on the acclaimed α33 and α55 models, the α35 camera with Sony’s Translucent Mirror Technology allows responsive, accurate continuous autofocus – whether shooting high-speed still photos or recording full HD movies.

“Our Translucent Mirror Technology continues to push the limits of modern DSLR technology,” said Kristen Elder, director of the alpha digital imaging business at Sony Electronics. “The new α35 camera combines this unique innovation with a newly developed APS HD CMOS sensor and a diverse, user-friendly interface, making it a compelling choice for experienced photographers and first-time SLR buyers alike.”

She added, “Amateur photographers will appreciate the on-screen Help Guide, which gives a clear explanation of selected functions and how they’re used. More advanced photographers will welcome features such as a top panel-mounted button that is fully customizable, allowing instant recall of any one of 14 frequently-used functions according to their preference.”

Premium, High-Speed Performance

Making its debut on the α35 camera, Tele-zoom High Speed Shooting magnifies a central portion of the image area providing an effective 1.4x magnification (appx) while shooting at up to 7 fps. Providing continuous tracking autofocus of still or moving objects, this feature is ideal for capturing fast-moving sports, children’s expressions at just the right moment or distant subjects with a high-speed burst of frames. There’s also a rapid up to5.5 fps drive mode that offers full-resolution continuous shooting with tracking AF.

With a resolution of 16.2 effective megapixels, the Exmor APS HD CMOS sensor delivers stunningly detailed, low-noise still and HD video images. Complementing the sensor’s extremely high resolution and sensitivity, the camera’s powerful BIONZ® processor optimizes image data to assure flawless images with rich, natural color reproduction. A maximum sensitivity of ISO 12800 and extension to ISO 25600 makes it possible to capture beautifully natural still images and HD video in low light.

Advanced Quick AF Live View continuously displays a real-time output from the main image sensor during still or Full HD video shooting. Light is partially directed from the translucent mirror to an AF sensor to permit non-stop precision TTL phase-detection autofocus – a benefit not possible with traditional DSLR cameras.

Shooting stills or AVCHD video, users can enjoy a superbly detailed view on the high-quality 3-inch Xtra Fine LCD display. Sony’s TruBlack technology assures high-contrast images with rich, deep blacks – even when shooting outdoors.

The high-resolution Tru-Finder display offers a precision alternative to framing shots on the camera’s LCD. Offering an extremely detailed, high contrast image with full 100% field coverage, it’s ideal for live preview of picture effects and exposure adjustments. Accurate composition of landscapes, architecture and other scenes is enhanced by 3 selectable grid line patterns.

Creative New “Picture Effects”

The α35 model offers a new in-camera ‘Picture Effect’ setting that lets users add extra impact to stills or Full HD video during shooting, without the worry of editing images afterwards. Effects can be previewed on the camera screen, allowing photographers to see the result of a chosen effect instantly rather than post-shooting. The inspiring palette of artistic treatments includes Retro Photo, High-key, Toy Camera and Posterization.

It’s also easy to produce dramatic Partial Color effects, with a single color highlighted against the rest of the image in monochrome. This popular effect is normally achieved through a series of painstaking steps using photo editing software. With the new α35 camera it’s both automatic and instant.

Improved Battery Life and Compatible α Accessories

Reductions in power consumption boost the camera’s battery life to a generous 440 still shots (approx.when using the rear LCD panel) between battery charges – a 30 percent increase over its predecessor.

The α35 model is compatible with the full range of 32 A-mount interchangeable lenses that includes six Carl Zeiss® lenses, as well as the full range of alpha accessories including flashes, carrying cases, LCD monitors and more.

The new camera is compatible with Sony’s full line of SD memory cards, including the newest Class 10 versions, as well as the Memory Stick PRO-HG Duo HX series. Available in capacities up to 32 GB, both media enable higher read speeds for more stable and optimal performance by Sony hardware features such as high-speed burst shooting or HD movie shooting.

Firmware Upgrade for A33 / A55 Models

Available beginning June 20^th, a firmware update for existing α33 and α55 cameras adds several creative and operational enhancements.

Support for the ‘Picture Effect’ function featured on the new α35 model is now offered. High-Speed Synch is supported during wireless operation with a compatible external flash (α55 only). Ergonomics are further improved with revised menus and a new mode that lets users switch shooting parameters overlaid on-screen for clear, uncluttered composition. The a33 and a55camera’s Digital Level Gauge can also be displayed when shooting via the optional CLM-V55 external LCD monitor. Frequently used features can now be custom-assigned to the D-RANGE button for rapid, menu-free access.

The upgrade can be downloaded from: (www.esupport.sony.com).

Pricing and Availability

The new α35 interchangeable lens camera will be available this August with an 18-55mm kit zoom lens (model SEL1855) for about $700. It will also be offered as a body-only (without kit lens) for about $600.

Sony NEX-C3 – Press Release

Sony Introduces World’s Smallest, Lightest Interchangeable Lens Camera with APS-C Sized Sensor

Easy-to-use a NEX-C3 Features 16.2 Megapixels, HD Video and Friendly New Interface

SAN DIEGO, June 8, 2011 – Sony’s new α NEX-C3 is the world’s smallest, lightest interchangeable lens camera with an APS-C sized sensor.

Offered in a range of stylish colors, the NEX-C3 brings the promise of DSLR-quality photography to the millions of consumers looking to take professional-looking photos without the size and bulk of traditional DSLR cameras.

The NEX-C3 features an attractive new body design that combines a satisfyingly solid metal top casing with an easy-to-use streamlined grip shape. Reducing the size of its internal circuitry visibly shrinks the camera’s size and achieves a body weight of just 225g (approximately 8 ounces) – nearly six percent lighter than its predecessor, the NEX-3 camera. Image quality, functionality and usability of the NEX-C3 camera also surpass that of the NEX-3 model.
The resolution of the camera’s large Exmor APS HD CMOS sensor is boosted to 16.2 effective megapixels, capturing stills and 720p HD video with breath-taking clarity. The large, DSLR-sized sensor also lets users produce pro-quality background defocus effects, whether shooting HD video or stills.

“Building on the success of last year’s α NEX launch, the new NEX-C3 model takes the idea of ‘small camera body, SLR-quality photos’ to a whole new level,” said Kristen Elder, director of the alpha digital imaging business at Sony. “This camera’s brand new, large CMOS sensor and user-friendly interface will allow all photographers, regardless of experience level, to produce unique, custom-styled photographs. The NEX-C3 is a perfect combination of design, performance and creativity that fits a wide range of activities and shooting styles.”

Photo Creativity

The intuitive new Photo Creativity interface on the NEX-C3 camera puts sophisticated controls within easy reach, whether users are shooting stills or HD Video. Technical terms like ‘aperture’, ‘exposure value’ and ‘white balance’ are replaced with the friendlier and more intuitive ‘background defocus’, ‘brightness’ and ‘color’, allowing users to easily create custom-styled photographs. A traditional interface with Aperture/Shutter Priority, Manual and custom functions is always available for experienced users, along with highly customizable soft-keys for programming direct access to important controls.

With the NEX-C3 camera, users don’t need to dig into confusing menu options or guess their effect on a composition. They just need to turn the camera’s rear-mounted control wheel and instantly see the effect of their settings previewed on screen. Also, two or more different settings can be combined to create more sophisticated creative effects.

A new in-camera ‘Picture Effect’ setting lets users add extra impact to stills or HD video during shooting, without the worry of editing images afterwards. ‘Picture Effect’ options include Partial Color, Retro Photo, Pop Color, High Contrast Monochrome, Posterization, High-key and Toy Camera. There’s also a ‘Soft Skin’ effect that removes wrinkles and blemishes from portrait subjects.

Tilting for comfortable viewing at any angle, the high contrast 3-inch (measured diagonally) Xtra Fine LCD features TruBlack screen technology for high-contrast images with rich, deep blacks. This is an ideal way to compose shots and judge the effect of adjusting picture settings, even when viewing outdoors in bright sunlight.

Long-Lasting Battery
The NEX-C3 works even harder to capture amazing images and HD video between battery charges. Improved energy efficiency boosts battery life to a generous 400 still shots per charge – a more than 20 percent increase from the both the NEX-5 and NEX-3 cameras.

Multi-Shot Imaging Technologies

Sony’s Advanced multi-shot technologies further broaden the possibilities of the NEX-C3 camera. 3D Sweep Panorama mode captures extra-wide images that can be viewed in 3D on a 3D television with compatible 3D glasses. Auto HDR “stacks” a high-speed burst of three successive exposures to capture extreme shadow and highlight details in a single frame. Similarly, Handheld Twilight and Anti-Motion Blur modes automatically combine six exposures to capture smooth, low-noise images. This avoids hand-blur and subject-blur when shooting in available light.

New E-mount 30mm Macro Lens and Other Compatible Accessories

The versatility of the α E-mount compact camera system grows with new style-matched accessories to expand shooting possibilities even further.

Joining the range of E-mount interchangeable lenses, the SEL30M35 is currently the world’s lightest life-size macro lens (approx 4.9 ounces) for interchangeable-lens cameras. This high-quality 30mm F3.5 macro lens features a 1:1 magnification ratio and minimum working distance of just 0.95 inches (2.4 cm), making it ideal for capturing detail-packed close-ups of small subjects like flowers and insects. Despite its extremely compact size, the SEL30M35 employs one ED glass and three aspherical lens elements for excellent optical performance, with minimized aberration and very high edge-to-edge sharpness and contrast. It also offers smooth, quiet autofocus operation whether shooting stills or HD video. The macro lens is supplied with a matching lens hood.

Also available as an option, the new HVL-F20S is a style-matching flash that clips onto the Smart Accessory Terminal of NEX-C3 and other E-mount cameras. Powered directly by the camera, the flash requires no batteries, making it ultra-compact and light weight for travelling. With a generous GN20 (50mm, at ISO 100, m) flash power rating and adjustable head, it’s ideal for creating natural fill-in and bounce flash effects with portraits and everyday shooting subjects.
The expanded range of coordinating accessories features a new body case/lens jacket and a soft carrying case.

The new camera is also compatible with Sony’s full line of SD memory cards, including the newest Class 10 versions, as well as the Memory Stick PRO-HG Duo HX series. Available in capacities up to 32 GB, both media enable higher read speeds for more stable and optimal performance by Sony hardware features such as high-speed burst shooting or HD movie shooting.

Firmware update for NEX-5, NEX-3

A firmware upgrade (Version 4) adds the new ‘Picture Effect’ function to existing NEX-5 and NEX-3 cameras. It also adds a Peaking function to assist with more precise manual focusing. This upgrade will be available June 20thand can be downloaded from: (www.esupport.sony.com).

Pricing and Availability

The new NEX-C3 ultra-compact digital camera will be available this August in silver, black and pink with an 18-55mm kit zoom lens (model SEL1855) and will cost about $650. It will also be offered in black only with a 16mm lens (model SEL16F28) for about $600.

The new SEL30M35 E-mount Macro lens will be available this October for about $250 and the HVL-F20S flash will be available this August for about $150.

Here are the expected features for the Sony A35 (the next photo camera in the Sony Alpha range):

• 16MP CMOS EXMOR sensor
• HD video recording (Full HD or 1920×1080 or 1080p)
• Sensitivity: ISO 100-12800
• High-speed shooting mode with continuous AF
• New picture effects
• 3D panorama mode
• Continuous shooting at 7 fps
• 15-point AF
• HDR mode
• Electronic viewfinder (EVF) with 100% coverage
• Less than $700/700€

photo © 2011 jennifer chong | more info (via: Wylio)

This is visibly a consequence that could be foretold from the destruction generated by the earthquake and the ensuing tsunami. To give some perspective on this status in another industrial domain, Toyota announced that they were just restarting most of their plants in Japan but… that full production would not be reached before November or December. The issues with sub-contractors and suppliers will keep them waiting. The photography industry sees the same kind of problems.

So, a few new products will have to suffer a little from this:

• The launch of the new Sony NEX C3 (recently visible) could wait until June.
• The NEX-7 is still on schedule for July.
• The Sony Alpha 35 (next Alpha SLR camera, at entry level) will certainly have to wait until July.
• Le Sony Alpha 77 (future high-end SLR camera in the Alpha range of APS-C sensors) despite having been in the waiting list for a very long time will not be delayed (July anyway!) but will not be available before September; And don’t expect more than a few parts: Full production is targeting October (or even early November).
• No lens should be announced before August, maybe expect a 16-50mm to be presented with the A77 but probably not more available than th camera body.

While I’m at it, I have been confirmed that the launch of the Sony Portable PlayStation (game console) is still on the horizon but it could be not available before the Christmas holidays. Jack Tretton, president of Sony Computer Entertainment of America, has publicly admitted that in order to alleviate such issues they are ready to prioritize world markets. Some region(s) may see the product while others will be waiting (Apple is known for using such tactics on the iPhone). I would bet a large sum of money that Sony is going to play the same card with photo cameras (and I would also be ready to say that some eBay users are already prepared to play with exchange rates to buy cameras on continents where they do not live).

Not much to be learned about the technical features of the camera, but it seems clear that it would be available in kit with the Sony 55-200mm f/4-5.6 SAM DT zoom that is so perfectly adequate for this type of entry-level SLR cameras and the nice little Sony 18-55mm f/3.5-5.6 SAM DT zoom.

Messages from all over the world are announcing that Sony is currently discontinuing a number of SLR cameras:

• Sony Alpha 580 (from Singapore and other)
• Sony Alpha SLT 33

The most common interpretation of such news is that Sony is preparing a large number of official launches in the coming weeks. Most probably they will organize a blitzkrieg of press releases to wipe out the last memories of bad events following the recent earthquake and tsunami. This should start just before the NAB show in Las Vegas (April 9 to 14).

We expect to see:

• A new Sony Alpha 35 to replace (already) the Alpha 33 with only minor improvements but the same resolution.
• A new NEX-7 with more manual controls aimed at the expert public.
• The Sony Alpha 77 will not come in April, but only at the end of May or early June. But without waiting more, SonyAlphaRumors tells us that the EVF will be based upon a 3-MP OLED display (we already knew in January that it could have “more than 2 MP“).
• The Alpha 580 will not be replaced (the Alpha 77 will be enough to attract the same public at a very similar price point – Interesting, eh?).

But remember one thing. Sony intends to stage this regularly and up to the beginning of Summer.