EXCERPT page containing first few paragraphs. 2019-08-19 08:24:11
UA_SEARCH_BOT_null @ 188.8.131.52
This series follows up on the Poppy example, which showed red channel pattern noise. TWO examples are shown, show that the problem is not related to raw-file compression or to the lens used:
- First example with compressed raw shot with Zeiss Batis 135mm f/2.8.
- 2nd example with uncompressed raw shot with Sony 70-200mm f/2.8 OSS GM.
I shoot outdoors a lot, and that often means a dark blue sky, particularly in the mountains and when taking care to not blow out the highlights (snow, bright granite, etc). Dark blue is weak in red channel exposure, so that a pattern noise problem in the red channel should stand out. And so I had planned to approach it on just that real-world basis, which I have now done—and 2 minutes of shooting proved it out. Of course, a bright sky or one overlaid with clouds will give the red channel much more exposure, which will minimize noise and make the pattern noise of the A9 be very subtle to nearly invisible, a corollary that I have also verified.
Article continues for subscribers...
Diglloyd Guide to Mirrorless is by yearly subscription. Subscribe now for about 25 cents a day ($90/year).
BEST DEAL: get full access to ALL 8 PUBLICATIONS for only 68 cents a day ($249.95)!
Diglloyd Guide to Mirrorless offers comprehensive integrated coverage of most APS-C and full frame mirrorless cameras and lenses.
Special emphasis is placed on Sony full-frame, including Sony lenses and the high performance Zeiss Batis and Zeiss Loxia lenses plus Rokinon/Samyang and others. Fujifilm X, Olympus and Panasonic M4/3, Sigma dp Merrill and dp/sd Quattro are also covered in depth. Years in the making, it offers a wealth of material for choosing and using a mirrorless camera.
- Make better images by learning how to get the best results right away. For example, the best way to set up your Sony camera.
- Save money by choosing the right lens for your needs the first time, particularly with the numerous lenses available for Sony.
- Make better images, a sort of “cheat sheet” saving yourself months or years of ad-hoc learning—best practices and how-to and processing parameters are discussed and shown.
- Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to full camera resolution, plus large crops.
- Real world examples with insights found nowhere else. Make sharper images just by understanding lens behavior you won’t read about elsewhere.
- Aperture series from wide open through stopped down, showing the full range of lens performance and bokeh.
- Optical quality analysis of field curvature, focus shift, sharpness, flare, distortion, and performance in the field.
Want a preview? Click on any page below to see an excerpt as well as extensive blog coverage, for example on Sony.