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Digital Sensor Technology

Digital capture technology is discrete, and not the same as film..

Ray Angle, Vignetting, Color Shading on a Digital Sensor

Evenness of illumination, color shading, digital sensor effects, ray angle..

Focusing Accuracy (Case Studies)

Focusing accuracy and errors..

Longitudinal Chromatic Aberration

Understanding Longitudinal (Axial) chromatic aberration (LOCA)..

Leica M10

Leica M mount in slim body with SL-type sensor..

Leica M Typ 240 Compared To Full Frame Cameras

Relative sharpness and performance across cameras..

Leica M Monochrom (original)

Ultimate resolution in black and white..

M9: User’s Guide and Review

High resolution digital rangefinder.

Data Sheets.

Technical specifications from the manufacturer..

Ray angle and Color Shading With M Lenses

Off-center color casts, off-center sharpness..

Considerations in choosing a lens.

Focal lengths, color, weight and travel considerations. [relevant, but dated/old material].

Leica 18mm f/3.8 Super-Elmar-M ASPH

Leica’s widest prime lens..

Leica 21mm f/3.4 Super-Elmar-M ASPH

Leica’s best-performing 21mm..

Leica 35mm f/1.4 Summilux-M ASPH (2010 FLE)

Leica’s superlative and most natural lens for the M..

Leica 35mm f/2 Summicron-M ASPH

Leica’s f/2 35mm for the M..

Leica M 50mm Lenses

Six models to choose from..

Leica 90mm f/2 APO-Summicron-M ASPH

Leica’s longer tele for Leica M..

Leica 90mm f/2 APO-Summicron-R ASPH

Compact lens for portraiture or similar..

Zeiss ZM 15mm f/2.8 Distagon

Notes and examples..

Zeiss ZM 18mm f/4 Distagon

Compact high performance, ultra low distortion..

Zeiss ZM 21mm f/2.8 Biogon

Moderate speed high contrast ultra-wide..

Zeiss ZM 21mm f/4.5 C-Biogon

Zero distortion ultra-wide..

Zeiss ZM 25mm f/2.8 Biogon

Compact wide angle with brilliant contrast..

Zeiss ZM 28mm f/2.8 C-Biogon

Compact wide angle..

Zeiss ZM 35mm f/1.4 Distagon

Fast and ultra high performance moderate wide angle rangefinder lens..

  1. Zeiss ZM 35mm f/1.4 Zeiss Distagon
  2. Press Release for Zeiss ZM 35mm f/1.4 Zeiss Distagon
  3. MTF for Zeiss ZM 35/1.4 Distagon
  4. MTF on Mirrorless Cameras
  5. Field Curvature for Zeiss ZM 35/1.4 Distagon
  6. Depth of Field Table for Zeiss ZM 35/1.4 Distagon
  7. Vignetting for Zeiss ZM 35/1.4 Distagon
  8. Vignetting vs Effective Aperture at Periphery
  9. Distortion for Zeiss ZM 35/1.4 Distagon
  10. Examples at ƒ/1.4 in Eastern Sierra and White Mountains (M240)
  11. Examples at ƒ/1.4 in Eastern Sierra and White Mountains continued (M240)
  12. Examples: Quaking Aspen Variety (M240)
  13. Examples: Portraits (Panasonic S1R)
  14. Aperture Series: Walkway through Grass at Night (Panasonic S1R)
  15. Aperture Series: Moots MTB by Creek in Forest (Panasonic S1R)
  16. Examples: Night Shooting (Panasonic S1R)
  17. Aperture Series: Mosaic (Panasonic S1R)
  18. Aperture Series: Locomotive at Laws Railroad Museum (Nikon Z7)
  19. Aperture Series: Old Mining Engine (Nikon Z7)
  20. Aperture Series: Big Leaf Maple (M240)
  21. Aperture Series: Maple Leaf Underwater, Floating Leaves (M240)
  22. Aperture Series: Redwoods and Ferns (M240)
  23. Aperture Series: Fading Maple Leaves In Backlit Creek (M240)
  24. Aperture Series: Backlit Redwood Grove (M240)
  25. Aperture Series: Rotten Chair (M240)
  26. Aperture Series: Rocky Hillside (M240)
  27. Aperture Series: Exfoliating Granite and High Cloud Sun Drama (M240)
  28. Aperture Series: Granite Glacial Polish to Cloud’s Rest (M240)
  29. Aperture Series: Rusty Barn (M240)
  30. Aperture Series: Plants Eking Out Light Inside Barn (M240)
  31. Aperture Series: Green Lichen on North Side of Barn (M240)
  32. 6-way Shootout: ZM 35/1.4 vs 35/2 and 35/2.8, Leica 35/1.4 and 35/2, Voigtlander 35/1.2 (Wyman Cabin, M240)
  33. 6-way Shootout: ZM 35/1.4 vs 35/2 and 35/2.8, Leica 35/1.4 and 35/2, Voigtlander 35/1.2 (Aspen Trunk, M240)
  34. 6-way Shootout: ZM 35/1.4 vs 35/2 and 35/2.8, Leica 35/1.4 and 35/2, Voigtlander 35/1.2 (Pine Creek Morning, M240)

Zeiss ZM 35mm f/1.4 Distagon on Leica SL

A star performer sets the standard on the SL..

Zeiss ZM 35mm f/2 Biogon

All around razor sharp performer..

Zeiss ZM 35mm f/2.8 C-Biogon

Ultra compact high performance moderate wide angle rangefinder lens..

Zeiss ZM 50mm f/1.5 C-Sonnnr

Fast classic normal lens.

Zeiss ZM 50mm f/2 Planar

Pleasing and relatively inexpensive normal lens.

Zeiss ZM 85mm f/2 Sonnar

Ultra high performance (discontinued).

Zeiss ZM 85mm f/4 Tele-Tessar

Compact high performance medium telephoto..

Voigtlander Nokton 35mm f/1.2 II ASPH

Fasted 35mm lens for Leica M, great ergonomics..


Blog posts, reverse chronological

2019

2019-04-24 Shootout: Zeiss ZM 35mm f/1.4 Distagon vs Leica 16-35mm f/3.5-4.5 Elmarit-SL ASPH vs Leica 24-90: Downed Aspen in Lee Vining Creek (Panasonic S1R)

2019-04-20 Zeiss ZM 35mm f/1.4 Distagon Aperture Series: Mosaic (Panasonic S1R)

2019-04-14 Zeiss ZM 35mm f/1.4 Distagon Aperture Series: Moots MTB by Creek in Forest (Panasonic S1R)

2019-04-12 Zeiss ZM 50mm f/2 Planar Aperture Series: Mosaic (Panasonic S1R)

2019-04-12 Zeiss ZM 35mm f/1.4 Distagon Examples: Night Shooting (Panasonic S1R)

2019-04-10 Zeiss ZM 35mm f/1.4 Distagon Aperture Series: Walkway through Grass at Night (Panasonic S1R)

2019-04-08 Zeiss ZM 35mm f/1.4 Distagon on Panasonic S1R: Evaluating Applicability for Environmental Portraiture

2019-04-04 Reader Comments on Leica M Lenses and Zeiss ZM Lenses on the Panasonic S1R

2019-03-20 Request for Feedback: How Best to Partition my Publication Offerings? (updated with addendum)

2019-02-03 Zeiss ZM 35mm f/1.4 Distagon Aperture Series: Old Mining Engine (Nikon Z7)

2019-01-22 Zeiss ZM 35mm f/1.4 Distagon Aperture Series: Locomotive (Nikon Z7)

2019-01-06 Zeiss ZM 35mm f/1.4 Distagon on Nikon Z7

2018

2018-12-08 Beware Lens Adapters Getting Stuck

2018-12-07 Nikon Z7 and Zeiss ZM 35mm f/1.4 Distagon Here — Looks Promising

2018-11-27 Nikon Z7 Should Be a Solid Leica M and Zeiss ZM Lens Platform Without Modification

2018-11-07 Reader Comments: Mirrorless System Choice (Nikon Mirrorless, Canon Mirrorless, Sony Mirrorless, Medium Format)

2018-10-31 Nikon Z7 Should Be a Solid Leica M and Zeiss ZM Lens Platform Without Modification—to Verify Soon

2018-10-09 Nikon Z7: Thin 1.1mm Sensor Cover Glass Gives Promise of using M-Mount Lenses with Good Performance

2017

2017-07-15 Reader Comment: Leica SL as Platform for Leica M Lenses

2017-07-12 Leica M10 Examples with 18/3.8 Super-Elmar-M ASPH and Zeiss ZM 35mm f/1.4 Distagon: Dana Lakes Hike

2017-07-05 Leica M10 Examples with 18/3.8 Super-Elmar-M ASPH and Zeiss ZM 35mm f/1.4 Distagon: Saddlebag Lake

2017-07-04 Leica M10 Examples with 18/3.8 Super-Elmar-M ASPH and Zeiss ZM 35mm f/1.4 Distagon: Saddlebag Lake

2016

2016-07-27 Zeiss ZM 35mm f/1.4 Distagon: Drawing Style

2016-07-23 New Coverage of Leica SL, Leica 24-90mm Vario-Elmarit-SL ASPH, Zeiss ZM 35mm f/1.4 Distagon

2016-07-22 Shootout on Leica SL: Leica 24-90/2.8-4 Vario-Elmarit-M ASPH OIS vs Zeiss ZM 35/1.4 Distagon, 'Fresh June Snow on White Mountains'

2016-07-21 Zeiss ZM 35mm f/1.4 Distagon Aperture Series: Miner’s Coveralls + Moiré with Leica SL

2016-07-21 Zeiss ZM 35mm f/1.4 Distagon Aperture Series: DeChambeau Barn (Leica SL)

2016-07-21 Leica SL: Hot Pixels + Pattern Noise at ISO 100

2016-07-20 Zeiss ZM 35mm f/1.4 Distagon Aperture Series: Cerro Gordo Relief for Women and Men + 5 More (Leica SL)

2016-07-20 Zeiss ZM 35mm f/1.4 Distagon Aperture Series: Cerro Gordo Mining Store Cabin (Leica SL)

2016-07-20 Zeiss ZM 35mm f/1.4 Distagon Aperture Series: Cerro Gordo Cash Register (Leica SL)

2016-07-19 Leica 50mm f/2 APO-Summicron-M ASPH in Silver Anodized Finish

2016-06-18 Reader Comment on Inquiries

2016-06-17 Leica SL a Replacement for M240 when Shooting M lenses?

2016-06-11 Zeiss ZM 35mm f/1.4 Distagon on Leica SL — a Joy to Focus and Still the Best Overall M Lens

2016-03-29 Zeiss Rebates for DSLR and Rangefinder Lenses + New Products from Sony

2015

2015-05-22 Zeiss ZM 35mm f/1.4 Distagon Aperture Series: Green Lichen on North Side of Barn (M240)

2015-05-20 Zeiss ZM 35mm f/1.4 Distagon Aperture Series: Rusty Barn (M240)

2015-05-20 Zeiss ZM 35mm f/1.4 Distagon Aperture Series: Plants Eking Out Light Inside Barn (M240)

2015-04-29 Zeiss ZM 35mm f/1.4 Distagon Now IN STOCK

2015-03-31 Zeiss ZM 35mm f/1.4 Distagon Shipping, and Its Lens Shade

2015-02-17 6-way Shootout at 35mm: Zeiss ZM 35/1.4 Distagon, 35/2 Biogon, 35/2.8 C-Biogon, Voigtlander Nokton 35/1.2 II ASPH, Leica 35/1.4 Summilux, Leica 35/2 Summicron

2015-01-20 Sony Kolarivision A7R.MOD: Performance with Zeiss ZM 21mm f/4.5 C-Biogon (a worst case)

2015-01-11 6-way Shootout at 35mm: Zeiss ZM 35/1.4 Distagon, 35/2 Biogon, 35/2.8 C-Biogon, Voigtlander Nokton 35/1.2, Leica 35/1.4 Summilux, Leica 35/2 Summicron

2015-01-05 Zeiss ZM 35mm f/1.4 Distagon Lens Rendering Aperture Series: Rocky Hillside

2014

2014-11-16 Leica M Typ 240 is $750 off, plus $250 off Leica M Lenses

2014-10-18 Zeiss ZM 35mm f/1.4 Distagon: Ideal Match for the Leica M Typ 240

2014-10-14 Zeiss ZM 35mm f/1.4 Distagon: a Study in Quaking Aspen

2014-10-13 Zeiss ZM 35mm f/1.4 Distagon: More Field Examples

2014-10-11 Zeiss ZM 35mm f/1.4 Distagon: I rate it the best M Lens Available

2014-10-11 Zeiss ZM 35mm f/1.4 Distagon: Aperture Series 'Exfoliating Granite and High Cloud Sun Drama'

2014-10-11 Zeiss ZM 35mm f/1.4 Distagon Aperture Series: Granite Glacial Polish to Cloud’s Rest

2014-10-10 Zeiss ZM 35mm f/1.4 Distagon: More Field Examples

2014-10-10 6-way Shootout at 35mm: Zeiss ZM 35/1.4 Distagon, 35/2 Biogon, 35/2.8 C-Biogon, Voigtlander Nokton 35/1.2, Leica 35/1.4 Summilux, Leica 35/2 Summicron

2014-10-07 Zeiss ZM 35mm f/1.4 Distagon: Aperture Series 'Rotten Chair'

2014-10-05 Zeiss ZM 35mm f/1.4 Distagon: Examples at f/1.4 in Eastern Sierra and White Mountains

2014-10-02 Zeiss ZM 35mm f/1.4 Distagon: Rendering Style Sets New Benchmark

2014-09-30 Returning from Trip

2014-09-24 Zeiss ZM 35mm f/1.4 Distagon In the Field

2014-09-17 Zeiss ZM 35mm f/1.4 Distagon: Aperture Series 'Fading Maple Leaves in Backlit Creek'

2014-09-17 Zeiss ZM 35mm f/1.4 Distagon: Aperture Series 'Backlit Redwood Grove'

2014-09-16 Zeiss ZM 35mm f/1.4 Distagon: Aperture Series 'Underwater Maple Leaf'

2014-09-16 Zeiss ZM 35mm f/1.4 Distagon: Aperture Series 'Redwoods and Ferns'

2014-09-16 Zeiss ZM 35mm f/1.4 Distagon: Aperture Series 'Big Leaf Maple'

2014-09-16 Zeiss ZM 35mm f/1.4 Distagon for Leica M: Best 35mm M Lens Yet?

2014-09-04 Zeiss Loxia vs Zeiss ZM 35mm f/2 Biogon on Sony A7R

2014-09-02 Zeiss Loxia: Manual Focus All Metal Build Lenses for Mirrorless Full Frame

2014-06-07 Sony A6000: Outsize Value with Instant Savings — and is the A6000 an Enabling Platform for Zeiss ZM Lenses?

2014-05-28 Which 50mm Lens for Leica M?

2014-04-15 Future Sensors: Will they be Friendly to Rangefinder Lenses? (Ray Angle)

2014-03-31 Secondary Color Correction with Leica 90/2 APO, Zeiss ZM 85mm f/4 Tele-Tessar, ZM 85/2 Sonnar: Barn Interior (Leica M240)

2014-03-28 Zeiss ZM 85mm f/4 Tele-Tessar Aperture Series: Teak Bench (Sony A7R)

2014-03-20 Zeiss ZM 85mm f/4 Tele-Tessar and the ZM 85mm f/2 Sonnar

2014-03-20 Zeiss ZM 85mm f/4 Tele-Tessar Aperture Series: Teak Bench (Leica M240)

2014-03-20 Zeiss ZM 85mm f/4 Tele-Tessar Aperture Series: Picnic Table (Leica M240)

2014-03-20 Zeiss ZM 85mm f/4 Tele-Tessar Aperture Series: Olympic Bar (Leica M240)

2013

2013-10-22 Sony NEX A7 and A7r: Leica M Lenses to Work Well?

2013-10-22 Eye Detection in Sony A7R: It’s About Time

2013-10-10 Sony NEX A7 and A7r: 24 and 36 Megapixels on Full Frame?

2013-06-29 Which 50mm Lens for Leica M?

2013-06-08 Choosing a Leica M 50mm Lens

2013-06-06 Leica M: Which is the Highest Performing 35mm lens?

2013-04-19 Leica M Typ 240: 35/1.4 Summilux or Zeiss 35/2 Biogon?

2012

2012-10-29 Reader Question: Leica M Lenses/Focusing and Zeiss ZM 35/2 Biogon

2012-09-06 Zeiss Plans a new ZM Lens (Fits Leica M and Mirrorless w/adapter)

2012-07-07 Reader Comment: Zeiss ZM 15/2.8 Distagon on Leica M9, Corner Fix

2012-06-06 Zeiss ZM Lenses on Leica M Digital

2012-03-13 Fuji X-Pro1 Sensor — Prospects for Leica M, Zeiss ZM Wide-angle Lenses

2012-03-10 Which 28mm Leica M Lens is Best? 28/2.8 Elmarit or 28/2 Summicron?

2012-02-05 Fuji X-Pro1 — Coming Soon

2012-01-20 Reader Comment: Ricoh GXR With Zeiss ZM Lenses

2012-01-14 Reader Comments on Leica Lens Availability

2012-01-12 Fuji X-Pro1 — Leica M and Zeiss ZM Lenses Will be Possible

2012-01-11 To be tested: Sony NEX-5N, Sony/Zeiss 24mm f/1.8, More Leica M, Zeiss ZM

2012-01-11 Leica Guide: Zeiss ZM 25/2.8 Biogon + 35/2 Biogon Examples

2012-01-08 Sony NEX-7: Zeiss ZM 35mm f/2 Biogon Aperture Series

2012-01-08 Sony NEX-7: Zeiss ZM 25/2.8 Biogon and 35/2 Biogon Examples + Noise Reduction by Downsampling

2012-01-04 Sony NEX-7: Ray Angle for Zeiss ZM Lenses

2011

2011-06-23 Leica M9: Leica 21/3.4 Super-Elmar-M ASPH or Zeiss ZM 21/2.8 Biogon?

2011-03-02 Accuracy of Rangefinder Focusing With Leica M and Zeiss ZM Lenses on Leica M9

2010

2010-02-18 Zeiss ZM 15mm f/2.8 Distagon on Leica M9

2010-02-14 Leica M9 review: examples and more with Leica 75/2 APO-Summicron-M + Zeiss ZM 25/2.8 Biogon

2009

2009-11-19 Leica M9 and off-center color

2009-11-14 Leica M9 learning

2007

2007-07-25 Zeiss ZM (Leica rangefinder) lens review

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