Imagery: Auto - Large Table of Contents

EXCERPT page containing first few paragraphs. 2023-02-08 03:07:42

Leica M Monochrom Typ 246
200% of actual pixels

Bad CMOS Sensor: Entire Column Mapped Out (M Monochrom Typ 246)

This same pixel column defect was documented with the CCD sensor in the Leica M9 in Sensor Defect: Bad Pixel Column (M9 CCD).

Bad individual pixels are unavoidable, and are routinely mapped out by camera firmware. Pixels can also be “killed” by cosmic rays even after the camera has shipped; this can be fixed by most vendors, again via a firmware update. Single bad pixels, even thousands of them (typical), are simply not an issue in a 24 megapixel sensor. But an entire bad pixel column has troublesome effects for the “wrong” subject matter, as is shown here.

Apparently Leica considers two entire pixel column defects to be acceptable, as seen here with the test camera (a production/release camera body). For such a high-end product, your author has an expectation of getting quality commensurate with the price, and even more so for a specialty camera having no anti-aliasing filter. That means zero pixel column defects not two, or even one. Sensor costs do go up when rejecting sensors with bad pixel columns, but at around 2.5X to 4X the price of other full frame cameras, expectations for quality commensurate with the price is not unreasonable.

Article continues for subscribers...

Diglloyd Guide to Leica 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 LEICA contains in-depth coverage of Leica M system cameras and lenses, with additional coverage of Leica M Monochrom, Leica Q.

Special emphasis is placed on Leica M lenses and certain Zeiss ZM lenses.

  • Make better images by learning how to get the best results right away.
  • Save money by choosing the right lens for your needs the first time, particularly the Summilux/Summicron/Elmarit choice and/or Zeiss ZM.
  • Make better images, a sort of “cheat sheet” saving yourself months or years of ad-hoc learning. 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 [past 2 years or so].
  • 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 Leica.

Actual pixels

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.