In search of optimum tradeoff of noise and resolution in a 5 megapixel resize of NEX-5 and NEX-7 images, I tried a series of averaging operations before the resize. The one that worked best for the NEX-7 test image was a 2-pixel box blur in Photoshop followed by a resize in Perfect Resize using the… [Read More]

It’s a truism that sensors with larger photosites have less noise. But you can reduce noise by combining information from small photosites into fewer pixels than with a standard Bayer conversion. In my mind, this is ideally performed before demosaicing, but raw converters don’t, in my experience, allow to to choose the resolution rendered by… [Read More]

I didn’t remember having trouble with purple corners with the NEX-5, so I thought I’d run a test. I took photographs of a cloudy sky with both the NEX-5 and the NEX-7. I used my worst lens for generating purple corners, the Leica Elmar f/3.8 24mm. I set it to its worst aperture for purple… [Read More]

Yesterday morning, I set out to make a series of pairs of images, letting the NEX-7 focus the first image in the pair, and manually focusing the second. The images did not turn out the way I expected. I expected to catch the NEX-7 making autofocus mistakes. Now that I understand the limitations of the… [Read More]