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See also: MTF and Micro Contrast
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Understanding Modulation Transfer Function (MTF)

Understanding resolution and contrast graphs..

Nikon NIKKOR Z 24-50mm f/4-6.3

Pancake zoom, wide angle to normal..

Sony Planar T* FE 50mm f/1.4 ZA

Fast high performance normal lens of Zeiss design..

Sigma 35mm f/1.2 DG DN Art

Ultra high speed native-mount moderate wide angle..

Ricoh GR

Razor sharp 28mm lens on APS-C sensor and outstanding usability and features..

Blog posts, reverse chronological


2020-07-07 Sony FE 12-24mm f/2.8 GM: will it be the ultra wide zoom I’ve been hankering for?


2019-11-15 The Reality of Zoom Lens Performance

2019-09-07 Sigma 14-24mm F/2.8 DG DN Aperture Series @ 24mm: Teak Bench Closeup

2019-09-01 First Look at the Sigma 35mm f/1.2 DG DN Art: Lack Micro Contrast at f/1.2 and f/1.4


2017-02-25 MTF for Fujifilm GFX GF Lenses


2016-07-11 NEW Sony Planar T* FE 50mm f/1.4 ZA for Sony Mirrorless

2016-02-04 Sony Diffraction-Free Computed (not measured) Fantasy MTF Charts


2015-01-26 What does 50 Megapixels mean vs 36 Megapixels?


2013-07-18 Ricoh GR: Lens Quality and MTF

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