John Knuhtsen

John Knuhtsen

Lives in Denmark Copenhagen (north), Denmark
Works as a engineer, software developer
Joined on Oct 20, 2004
About me:

Started shooting with my fathers Kodak Retinette 1B (45 mm F/2.8 Rodenstock lens, half automatic) in about 1966. Then I got my first camera in 1971, a Canon QL19. Went to SLR as a student with a Nikkormat with 55 mm Micro Nikkor, 28 and 135 mm in 1974. Darkroom experience with black & white and color positives. Then went digital in 2003 with a Sony V1 bought at B+H Photovideo in New York. After that 2 other point-and-shoot cameras (Panasonic and Nikon). Then got my Nex-6 in 2012. Of lenses I have the SEL1650, E16 F/2.8 plus VCLECU1 for 12 mm, Sigma 30 and 19 F/2.8 and then 25 selected legacy, manual lenses. I have about 10 selected russian lenses (m39 and m42) and also some Konica Hexagon.
I was a consultant within technical optics from 1977-1993, then I had to change to software.
My passions are people and travel, snapshots and landscapes.

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Snapshot of threads updated recently in which you have recently participated.

Subject Forum Last post
Still worth getting a Contax 35-70 f3.4? Adapted Lens Talk 2 weeks ago
Mirror lens Sony Alpha / Nex E-mount (APS-C) Talk 2 months ago
a6500 focus lock chirp Sony Alpha / Nex E-mount (APS-C) Talk 2 months ago
Not much of a birder Adapted Lens Talk 2 months ago
Olympus OM 85mm f2 or Samyang 85mm f1.4? Sony Alpha / Nex E-mount (APS-C) Talk 2 months ago
Sony A7 II or A6500 Sony Alpha / Nex E-mount (APS-C) Talk 2 months ago
Need Some Help Adapting a 1911/1912 Zeiss Tessar 7,5cm f/3.5 Lens Adapted Lens Talk 3 months ago
Anti reflex coating development over the years? Adapted Lens Talk 4 months ago
Request for a decent 70-300 APS-C e-mount Sony Alpha / Nex E-mount (APS-C) Talk 4 months ago
Gear for Iceland Sony Alpha / Nex E-mount (APS-C) Talk 4 months ago
Tamron 150-600mm G1 + Sigma 1.4x teleconverter Third Party Lens Talk 4 months ago
Sony A6300 + MC-11 + TC-1401 + Sigma 150-600 Contemporary Rocks Sony Alpha / Nex E-mount (APS-C) Talk 4 months ago
Largest print size from sony A6xxx Sony Alpha / Nex E-mount (APS-C) Talk 4 months ago
Switching from Sony FF to 6500...need lens help Sony Alpha / Nex E-mount (APS-C) Talk 4 months ago
CK’s Lens Post: A Tale of Three Argus C3 Lens to NEX Adapters Adapted Lens Talk 5 months ago
How quiet is the a6500? Sony Alpha / Nex E-mount (APS-C) Talk 5 months ago
Nikon Micro Nikkor 55mm f/2.8 on a6000 Sony Alpha / Nex E-mount (APS-C) Talk 8 months ago
best value for money 50mm legacy prime for a7? Sony Alpha Full Frame E-mount Talk 8 months ago
Konica AR Hexanon 40mm f/1.8 pancake lens on E-mount. Sony Alpha / Nex E-mount (APS-C) Talk 9 months ago
Zoom lens on focal reducer? Adapted Lens Talk 11 months ago
Minolta 70-210 f4 on a Fuji XE1, Adapted Lens Talk 11 months ago
Argus C3 (The Brick) lens on a7 Adapted Lens Talk Nov 30, 2016
Anyone use the Minolta MD 28mm f2.8 on a sony a6000? Adapted Lens Talk Nov 4, 2016
What's the most universal focal reducer? Sony Alpha / Nex E-mount (APS-C) Talk Sep 23, 2016
does pixel pitch matter? Sony Alpha Full Frame E-mount Talk Aug 29, 2016
A7 Mark 2 vs A7R Mark 1 Sony Alpha Full Frame E-mount Talk Aug 23, 2016
Ye olde mirror lens Adapted Lens Talk Aug 13, 2016
Mir 1 vs Jupiter 12 Sony Alpha Full Frame E-mount Talk Aug 11, 2016
Mirror Lenses: Canon FD 500mm f/8 vs. Nikon 500mm f/8 (new) vs. Tamron 500mm f/8 (55BB) Adapted Lens Talk Jul 23, 2016
MIR 10A 28mm f3.5 (M42) Adapted Lens Talk Jul 11, 2016
Lens help for a Leica novice Leica Talk Jul 7, 2016
Using the Sigma 60 f/2.8 on a6300 Sony Alpha / Nex E-mount (APS-C) Talk Jun 29, 2016
A7rii in Iceland Sony Alpha Full Frame E-mount Talk Jun 23, 2016
Commlite EF-NEX AF Converter, Mini review Sony Alpha Full Frame E-mount Talk Jun 23, 2016
Canon NFD 400mm f4.5 Not as Sharp as Expected Adapted Lens Talk May 31, 2016
Jupiter-9 controversy Adapted Lens Talk May 9, 2016
A7RII for African photo safari? Sony Alpha Full Frame E-mount Talk Mar 30, 2016
Third party lens comaprison Adapted Lens Talk Mar 18, 2016
Samples of the NEX6 and Canon FD 400mm f4.5 lens Sony Alpha / Nex E-mount (APS-C) Talk Mar 2, 2016
Which legacy, manual-focus, zoom lens (24-70) would you recommned for the A7? Sony Alpha Full Frame E-mount Talk Feb 27, 2016
Minox lenses for Nex? Adapted Lens Talk Dec 30, 2015
Should I sell all my vintage gear ? Sony Alpha / Nex E-mount (APS-C) Talk Dec 29, 2015
Not your usual portrait lens Sony Alpha / Nex E-mount (APS-C) Talk Dec 20, 2015
Sigma 30mm for the a6000 user experience Sony Alpha / Nex E-mount (APS-C) Talk Dec 19, 2015
Nikkor lens on Sony Sony Alpha / Nex E-mount (APS-C) Talk Dec 11, 2015
Legacy 35mm lens suggestions Sony Alpha / Nex E-mount (APS-C) Talk Nov 30, 2015
Random Legacy Lens Question Sony Alpha Full Frame E-mount Talk Nov 13, 2015
lens turbo adapters for Sony e-mounts. Sony Alpha / Nex E-mount (APS-C) Talk Nov 12, 2015
Zoom vs Primes Sony Alpha / Nex E-mount (APS-C) Talk Nov 10, 2015
Vintage Lens Suggestions Sony Alpha / Nex E-mount (APS-C) Talk Nov 9, 2015