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Understanding Modulation Transfer Function (MTF)

Understanding resolution and contrast graphs..

Fujifilm GF 23mm f/4 R WR

Ultra wide angle equivalent to 19mm f/3.3. .

Fujifilm GF 30mm f/3.5 R LM WR

Compact wide angle.

Fujifilm GF 30mm f/5.6 TS

Wide angle tilt/shift lens.

Fujifilm GF 45mm f/2.8 R WR

Moderate wide angle equivalent to 37mm f/2.3..

Fujifilm GF 50mm f/3.5 R LM WR

Slightly wide compact normal lens equivalent to 41mm f/2.9..

Fujifilm GF 55mm f/1.7

State of the art normal lens..

Fujifilm GF 63mm f/2.8 R WR

Standard normal lens equivalent to 52mm f/2.3..

Fujifilm GF 80mm f/1.7 R WR

Standard normal lens equivalent to 66mm f/1.4..

Fujifilm GF 110mm f/2 R WR

Ultra high speed telephoto equivalent to 90mm f/1.6..

Fujifilm GF 110mm f/5.6 TS

Telephoto tilt/shift macro lens.

Fujifilm GF 120mm f/4 Macro R LM OIS WR

High performance macro photography on medium format, equivalent to 99mm f/3.3..

Fujifilm GF 250mm f/4 OIS R WR

Telephoto equivalent to 200mm lens. .

Nikon NIKKOR Z 20mm f/1.8 S

Fast ultra wide angle for Nikon Z..

Nikon NIKKOR Z 24mm f/1.8 S

Fast wide angle for Nikon Z..

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

Pancake zoom, wide angle to normal..

Nikon NIKKOR Z 85mm f/1.8 S

Fast portrait telephoto for Nikon Z..

Sony FE 24mm f/2.8 G

High performance, high speed..

Sony Planar T* FE 50mm f/1.4 ZA

Fast high performance normal lens of Zeiss design..

Sony FE 40mm f/2.5 G

High performance, high speed..

Sony FE 50mm f/1.2 GM

High performance, high speed..

Sony FE 50mm f/2.5 G

High performance, high speed..

Sigma FE 14mm f/1.4 DG DN Art

Super-fast ultra-wide astrophotography lens..

Sigma FE 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


2023-03-14 Lens Sharpness, and Why Optical Focus Shift is the #1 Suckiest Lens Compromise

2023-01-17 Sony FE 20-70mm f/4G: Appealing Zoom Range, How Good Will It Be?


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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