Imagery: Auto - Large Table of Contents

EXCERPT page containing first few paragraphs. 2019-02-19 22:40:39
UA_SEARCH_BOT_null @ 34.229.194.198

Olympus Zuiko 75mm f/1.8 ED

Study: Focusing Margin of Error (Dolls)

The Olympus Zuiko 75mm f/1.8 ED is a very sharp lens, but how much margin for error is available when focusing at relatively close range? And how is the total result affected by small changes in focus?

See also Making Sharp Images for much more on focus accuracy and focus shift.

Entire frame

This exposure was a full two (2) stops more than the camera indicated was correct; a 1-stop pull was used. The +2 exposure cuts the noise in half by √4 = 2. Always use ETTR with small sensor cameras to minimize noise.

The results shown here are were taken at a distance of about 1.95 meters, which equates to a reproduction ratio of about 1:25— a tight head and shoulders portrait range.

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 7 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 28 megapixels filling up to 5K display, 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.

Aperture series 1.8, 4 available in full article

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.