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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Subject Forum Last post
What's the most universal focal reducer? Sony Alpha / Nex E-mount (APS-C) Talk 1 week ago
does pixel pitch matter? Sony Alpha Full Frame E-mount Talk 1 month ago
A7 Mark 2 vs A7R Mark 1 Sony Alpha Full Frame E-mount Talk 1 month ago
Konica AR Hexanon 40mm f/1.8 pancake lens on E-mount. Sony Alpha / Nex E-mount (APS-C) Talk 1 month ago
Ye olde mirror lens Adapted Lens Talk 1 month ago
Mir 1 vs Jupiter 12 Sony Alpha Full Frame E-mount Talk 1 month ago
Still worth getting a Contax 35-70 f3.4? Adapted Lens Talk 1 month ago
Mirror Lenses: Canon FD 500mm f/8 vs. Nikon 500mm f/8 (new) vs. Tamron 500mm f/8 (55BB) Adapted Lens Talk 2 months ago
MIR 10A 28mm f3.5 (M42) Adapted Lens Talk 2 months ago
Lens help for a Leica novice Leica Talk 2 months ago
Using the Sigma 60 f/2.8 on a6300 Sony Alpha / Nex E-mount (APS-C) Talk 3 months ago
A7rii in Iceland Sony Alpha Full Frame E-mount Talk 3 months ago
Commlite EF-NEX AF Converter, Mini review Sony Alpha Full Frame E-mount Talk 3 months ago
Canon NFD 400mm f4.5 Not as Sharp as Expected Adapted Lens Talk 4 months ago
Jupiter-9 controversy Adapted Lens Talk 4 months ago
CK’s Lens Post: A Tale of Three Argus C3 Lens to NEX Adapters Adapted Lens Talk 5 months ago
A7RII for African photo safari? Sony Alpha Full Frame E-mount Talk 6 months ago
Third party lens comaprison Adapted Lens Talk 6 months ago
Samples of the NEX6 and Canon FD 400mm f4.5 lens Sony Alpha / Nex E-mount (APS-C) Talk 6 months ago
Which legacy, manual-focus, zoom lens (24-70) would you recommned for the A7? Sony Alpha Full Frame E-mount Talk 7 months ago
best value for money 50mm legacy prime for a7? Sony Alpha Full Frame E-mount Talk 8 months ago
Minox lenses for Nex? Adapted Lens Talk 9 months ago
Should I sell all my vintage gear ? Sony Alpha / Nex E-mount (APS-C) Talk 9 months ago
Not your usual portrait lens Sony Alpha / Nex E-mount (APS-C) Talk 9 months ago
Sigma 30mm for the a6000 user experience Sony Alpha / Nex E-mount (APS-C) Talk 9 months ago
Nikkor lens on Sony Sony Alpha / Nex E-mount (APS-C) Talk 9 months ago
Legacy 35mm lens suggestions Sony Alpha / Nex E-mount (APS-C) Talk 10 months ago
Random Legacy Lens Question Sony Alpha Full Frame E-mount Talk 10 months ago
lens turbo adapters for Sony e-mounts. Sony Alpha / Nex E-mount (APS-C) Talk 10 months ago
Zoom vs Primes Sony Alpha / Nex E-mount (APS-C) Talk 10 months ago
Vintage Lens Suggestions Sony Alpha / Nex E-mount (APS-C) Talk 10 months ago
HELIOS 44-2 soft focus mod Sony Alpha / Nex E-mount (APS-C) Talk 10 months ago
got a Helios44 58 2 Sony Alpha / Nex E-mount (APS-C) Talk 10 months ago
What lenses would you choose? Sony Alpha Full Frame E-mount Talk 10 months ago
Olympus OM lenses on A7 bodies? Sony Alpha Full Frame E-mount Talk 11 months ago
Staircases from Istanbul Biennial Venues Leica Talk 11 months ago
Wife dropped the Camera!! Leica Talk 11 months ago
Canon EF 100-400 mm F/4.5-5.6 L IS on A7/A7R...any experience? Sony Alpha Full Frame E-mount Talk Sep 28, 2015
A7 and canon lenses autofocus Sony Alpha Full Frame E-mount Talk Sep 25, 2015
Travels in Rajasthan with the A7RII (mostly) : some observations Sony Alpha Full Frame E-mount Talk Sep 24, 2015
Lookin for decent M42 28mm, 35mm, 50mm lens Sony Alpha Full Frame E-mount Talk Sep 23, 2015
what legacy lenses for A7RII? Sony Alpha Full Frame E-mount Talk Aug 30, 2015
Really enjoying my 35/1.4! Sony Alpha Full Frame E-mount Talk Aug 16, 2015
should i buy a7s or wait? Sony Alpha Full Frame E-mount Talk Aug 14, 2015
Who is using the Minolta Rokkor legacy lenses and what focal lengths (SRT) Sony Alpha / Nex E-mount (APS-C) Talk Aug 13, 2015
which legacy mounts have thin adapters? Sony Alpha Full Frame E-mount Talk Aug 12, 2015
Sony A7RII Image Thread Sony Alpha Full Frame E-mount Talk Aug 11, 2015
How to control apture & shutter of a vintage lense mounted on a NEX body? Sony Alpha / Nex E-mount (APS-C) Talk Aug 9, 2015
Smallest Walkaround Zoom for A7? Sony Alpha Full Frame E-mount Talk Aug 8, 2015
Hello, and another vintage/legacy question Sony Alpha / Nex E-mount (APS-C) Talk Jul 26, 2015