Imagery: Auto - Large Table of Contents

EXCERPT page containing first few paragraphs. 2022-08-16 00:45:06

Pentax 90mm f/2.8
Pentax 645Z

Shutter Vibration: Landscape and Portrait Orientation, 90mm

Medium format cameras have large shutters and a natural question to ask is whether the shutter can cause loss of image sharpness. The Pentax 645Z does not have an electronic first curtain shutter option (EFC shutter).

This series was shot at a constant aperture of f/4 except for the longest exposure being stopped down just a bit more, the focus being fixed for all frames of course. Focus was also verified to not have changed after the series was shot.

Variable lighting was used as needed in order to maintain a constant aperture of f/4. Individuals images neutralized and matched in the center white donut, images shown in black and white as the slight color aliasing is not helpful.

Article continues for subscribers...

Diglloyd Medium Format is by yearly subscription. Subscribe now for about 33 cents a day ($120/year).
BEST DEAL: get full access to ALL 8 PUBLICATIONS for only 68 cents a day ($249.95)!

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.
  • 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 100 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.
Variants 1_250, 1_25 available in full article
Actual pixels, landscape orientation

diglloyd Inc. | FTC Disclosure | PRIVACY POLICY | Trademarks | Terms of Use
Contact | About Lloyd Chambers | Consulting | Photo Tours
RSS Feeds | Twitter
Copyright © 2022 diglloyd Inc, all rights reserved.