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Pentax 645Z
Pentax HD 35mm f/3.5 AL [IF]

Aperture Series: Pescadero Creek Upstream, Late Blue Dusk (645Z)

This outdoor near-to-far scene explores the consistency of sharpness and gains in depth of field for a real world outdoor landscape image. It was nearly dark, and the 645Z could not autofocus in these conditions; manual focus got the job done.

Depth of field expectations should thus be appropriate: in depth of field terms, as compared to a 35mm DSLSR, f/3.5 is equivalent to f/2.8, f/9 ~= f/7.2, f/11 ~= f/8.8. ; see Image/Sensor Size, and 645Z Focal Length and F-Stop Equivalence vs DSLR.

Pescadero Creek Upstream, Late Blue Dusk

Mirror lockup with 2 second self timer.
f-stop: 3.5, 5, 5.6, 9, 11
seconds: 10.0, 30.0, 30.0, 30.0, 91.0
push: +1.3, +0.2 +1.66, +2.66, +3.0 <== raw conversion in ACR

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Diglloyd Medium Format covers medium format camera systems, including the Hasselblad X1D and Fujifilm GFX.

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.
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  • 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.
Aperture series 3.5,5,6.3,9,11 available in full article

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