EXCERPT page containing first few paragraphs. 2019-03-24 15:23:57
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A “push” is an old photographic film term which involved chemically increasing the density of the emulsion (or decreasing it for negative film). For digital camera raw, it is exposure compensation during raw conversion.
CCD-based medium format cameras have traditionally been poor performers when underexposed, so how does the CMOS-based 645Z perform.
How good is the 645Z sensor when pushed to an extreme?
In the field usage benefits hugely from wide dynamic range, which by definition means the ability hold and pull detail out of deep black shadows (deep and black so that extreme highlights can also be captured without loss of detail).
The Pentax 645Z is examined here for its quality when pushed for up to nearly 6 stops. Since 5 stops is the maximum Adobe Camera Raw allows, the ~6-stop frame has been pushed 5 stops and had a highlight and a shadow boost to better match the intermediate frames.
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These systems are hugely expensive, so make the right choice for your own needs (full frame vs medium format).
- In-depth lens evaluations covering behaviors not likely to be found anywhere else, based on real-world field shooting.
- How to configure menus and buttons and best operating practices, gotchas and how-to.
- Real world examples with insights found nowhere else. Make sharper images just by understanding lens and camera behaviors.
- Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to 28 megapixels filling up to 5K display, plus large crops.
- 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.