Sony SLT-A65 Review
The actual sensitivity of each indicated ISO is measured using the same shots as are used to measure ISO noise levels, we simply compare the exposure for each shot to the metered light level (using a calibrated Sekonic L-358), middle gray matched. We estimate the accuracy of these results to be +/- 1/6 EV (the margin of error given in the ISO specifications). We found that measured ISO from the Sony SLT-A65 is roughly 1/3 stop higher than indicated across the ISO range - so ISO 100 indicated = ISO 125 measured.
Noise and Noise Reduction (JPEG)The SLT-A65's image quality is as good as identical to its bigger sister model A-77. At 100% on screen, noise is visible in JPEGs taken across the A65's entire range of ISO sensitivity settings if you look closely at areas of plain tone (like a blue sky for instance) but starts to become really noticeable at ISO 800 and above. Up to ISO 3200, the A65's noise-reduction system keeps things relatively smooth but above ISO 1600 you can clearly see that fine detail starts to suffer. In terms of detail reproduction at default settings there is quite a leap from ISO 800 to 1600 but this is only really apparent when images are viewed like this, critically, at 100% on screen. The noise graph, shown here, doesn't tell the whole story and it is clear that noise reduction is keeping measured noise levels low.
By ISO 16,000, even with noise reduction set to 'low' the medium-contrast detail in this test scene is all but obliterated. It is worth noting though that in 'real world' shooting at this setting, high-contrast scene elements are still relatively well-preserved, which makes images usable (just) for small prints and web use.
That said, the A65 is unequivocally a pretty noisy camera towards the upper end of its ISO sensitivity scale and if you plan on using the A65's highest ISO settings you should keep your expectations relatively modest.
RAW noise (ACR 6.6 Beta, noise reduction set to zero)
The amount of NR applied 'under the hood' is not high, but it does vary by camera (Adobe is attempting to normalize output across different sensors), so we are still looking at a balance of noise and noise reduction, rather than pure noise levels. However, the use of the most popular third-party raw converter is intended to give a photographically relevant result, rather than simply comparing sensor performance in an abstract manner.
Converting the A65 images in Adobe Camera RAW 6.6 Beta confirms the suspicion that we had when examining the camera's JPEG output. The A65's 24MP sensor is producing significantly higher noise levels than the competition, especially towards the top of its ISO sensitivity range. At ISO 1600 and above the disparity is obvious, and becomes more so as the ISO sensitivity increases. Above ISO 12,800, chroma noise from the A65's raw output is very high indeed.
As always, you should keep in mind that this is a pixel-level judgement and these files contain a lot of pixels. In the real world, with judicious use of post-capture noise reduction you can get much more from the A65's raw output than you might expect from the images and graphs on this page. That said, we've found that at high ISO settings in poor light, it is hard to 'rescue' images taken at ISO 6400 and above, even with careful raw post-processing.
Nov 11, 2014
Jun 29, 2013
Nov 16, 2011
Feb 5, 2013
|scrum break away by al booth|
from Sport competition
|Parking Deck by Olaf R|
from Your City - Parking Garage
|Communication Tech by alberto_b|
|With & without by OBellini|
from Empty - Full
Handevision is now shipping its all-metal Iberit 90mm F2.4 short telephoto lens for Leica M-mount 35mm and full-frame cameras.
Isocell comprises four sub-brands: Bright, Fast, Slim and Dual which are tailored to specific mobile device market demands.
The new store will be located at the Fotografiska center for contemporary photography in Stockhom, Sweden and carry the full range of Hasselblad products.
A recent vacation gave Richard a chance to think about the needs of travel photography – and how our reviews might recognize the perfect travel camera.
Need more evidence that 2017 is the year analog begins its comeback? Well, welcome another new film stock to the world.
The winners of the 10th annual iPhone Photography Awards have been announced, and they're striking.
If you were disappointed by reports that the Sony a9 struggles with adapted Canon glass, you might be able to take some comfort from Metabones' latest update.
Blackmagic Design has dropped the prices of its Video Assist external monitor/recorders for a limited time. Prices of the SD card-based recorders will be reduced in all markets, while supplies last.
Instagram has started testing a new feature called 'favorites' that enables users to share photos with only certain people. Only a small number of users have access to the feature at this time, though it may roll out to everyone in the future.
Lensbaby has announced the Velvet 85 F1.8 for interchangeable lens cameras. The lens is available in Canon, Nikon, Sony E, Sony A, Pentax K, Samsung NX, Fuji X and Micro 4/3 mounts.
It's the end of an era. Parent company Micron has announced that they are discontinuing the Lexar retail brand. This includes 'memory cards, USB flash drives, readers, and storage drives.'
Youthful trainspotter turned adult photographer, John Sanderson has traveled across the United States, documenting the country's railroads. But you won't find any trains in his pictures.
Sony's new CMOS sensor is backside-illuminated and offers an all-pixel global reset function which should drastically reduce rolling shutter effect when panning.
Shoulderpod has converted its offerings into a lego-like modular system by offering all individual parts of existing products separately, allowing users to build exactly the rig they need for a specific project or simply replace a damaged part.
Photographer Felix AAA has spent the past ten years touring the world with a variety of musicians, capturing behind the scenes shots and portraits. He talks about some of his favorite images on the FujiFilm Blog.
A roll of film discovered in an Argus C2 from an Oregon Goodwill turned out to contain some incredible images – and has been re-united with the original owner's family.
Nikon's 28mm F1.4E ED appears to roundly complete the company's updated lineup of fast, professional prime lenses. We've already seen some initial images from a Nikon ambassador, but we've worked through a gallery of our own, with a lens of our own over the past week. Take a look.
Google is holding a competition that could see your Pixel photos gracing millions of screens.
Nikon's 100th birthday party continues worldwide as a distributor in Italy organized a one-of-a-kind feat: assembling the world's largest 'human camera' from over a thousand volunteers.
Ricoh has dropped the price of its Theta SC 360 spherical camera by to $199, a reduction of roughly $50. The camera features two 12MP sensors and can record Full HD video in addition to stills.
Photojournalist Pete Souza served as the presidential photographer for both Ronald Reagan and Barack Obama. In an interview with fellow photographer Marcia Nighswander, he discusses several of his most noteworthy images.
Photographer Michael Wolf has been documenting the crowded conditions of Tokyo's subway trains since the 1990s. The photos have gone viral regularly in the years since he started the project, and he just published the final edition in the series.
The just-launched OnePlus 5 is getting a minor update that should improve camera function.
A Belgian camera shop is showing off an extremely rare, limited 'Rex Edition' Nikon D500. The cosmetic alterations were provided by a customer's German Shepherd Rex, who got ahold of the camera within a day of its purchase.
Adobe says that many of its users have been relying on SkyBox for VR editing and it therefore made sense to make the plug-ins available to all subscribers through Creative Cloud.
The Pictar grip provides a number of customizable physical controls for your iPhone camera, but at its price point we would like to see better materials and build quality.
Peak Design's 'consider every detail' approach shines in the Everyday Backpack. While expensive, it's one of the best options out there for a photographer who needs to pack a lot of stuff in addition to gear.
If you're thinking of using Canon's sports glass on the Sony a9, think again. The ultra-fast camera slows way down when you attach off-brand glass.
The Polish town of Katowice is not famed as an area of beauty, but as all photographers know, that doesn't mean that beauty can't be found if you look in the right places. Mariusz Pietranek used a drone to look down on the colorful sedimentation tanks at an ironworks.
New York Times video journalist Ben Solomon spent a harrowing three weeks accompanying Iraqi Major Sajjad al-Hour as he and his men fought to retake Mosul from I.S. forces.