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Noise

At 24.5 megapixels, one simply cannot expect low noise out of the A900.In fact, by ISO 800, noise is quite noticeable, but with two mitigating factors: the noise is very film-grain-like, and it goes very well with black and white rendition.

Noise or not, the 24.5 megapixels are addictive, and could provide tremendous fun in the black and white realm at ISO 800. Color images might suffer a bit, but even then one must remember that a 12MP camera needs much more enlargement so the noise relative to print size should be considered.

No ISO-by-ISO noise tests were done for the A900, because field shooting results boil it down to simple facts: noise is present at all ISO values, looking like texture, and avoiding the “plastic” look some have come to dislike with imagery from many Canon EOS models.The A900’s images look real no matter what the ISO, reminiscent of higher ISOs on the Nikon D3 (the Sony roughly showing 1.5-2 stops less low-light capability for similar perceived noise).

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Diglloyd DAP is DSLR-oriented, but also contains workflow and other topics. Much of the focus is on Canon and Nikon but also Pentax and Pentax medium format.

Special emphasis is placed on lens evaluation, focusing on Canon and Nikon and Sigma lenses, but with a few others like Rokinon/Samyang.

  • Make better images by learning how to get the best results right away.
  • Save money by choosing the right lens for your needs the first time, particularly some of the new Sigma Art lenses vs Nikon and Canon.
  • Workflow discusses image organization, raw conversion and post processing. Many examples show processing parameters for direct insight into how the image was converted.
  • Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to full camera resolution, plus large crops [past 2 years or so].
  • 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.

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sRGB and channels, 25% of actual pixels
ZA 135/1.8 Sonnar @ f/2,1/125 @ ISO 100, handheld with Anti Shake
Processing: White Balance=Auto, Creative Style=Standard, Noise Reduction=OFF

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