Imagery: Auto - Large Table of Contents

EXCERPT page containing first few paragraphs. 2019-09-16 08:31:59
UA_SEARCH_BOT_null @ 35.172.100.232

Sony A7R

Modifying the Sony A7R for Superior Rangefinder Lens Performance

The issue of ray angle is of considerable influence on image quality when using rangefinder lenses on Sony or other brand mirrorless.

The relatively thick sensor cover glass over the A7 family of cameras acts essentially as another lens element, greatly degrading performance. The worst effects include severe astigmatism in outer zones, along with lateral chromatic aberration

This page takes a quick look at the performance that can be expected with a stock Sony A7R (~2mm thick sensor cover glass) vs a KolariVision modified Sony A7R (“A7R_MOD” = ~1mm thick sensor cover glass).

See Filter Stack Thickness vs Digital Sensors in Making Sharp Images for a general discussion. There is no easy way to predict the issues, but one thing is certain: a steeper ray angle correlates with more quality loss: see Ray Angle From Lens Exit Pupil in Guide to Leica.

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.

  xxxxx






diglloyd Inc. | FTC Disclosure | PRIVACY POLICY | Trademarks | Terms of Use
Contact | About Lloyd Chambers | Consulting | Photo Tours
RSS Feeds | Twitter
Copyright © 2019 diglloyd Inc, all rights reserved.