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 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. Focal reducers (Zhongyi) for EOS and Minolta MD/MC. Then use mechanical adapters for eos to Olympus, M42 and Nikon F.
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
Is this Minolta Reflex 500mm F8 sharp? Sony Alpha/NEX E-mount Talk 1 day ago
Sony a7II Real world review Sony Alpha/NEX E-mount Talk 2 days ago
Nordstjernen - new signature Sony Alpha/NEX E-mount Talk 1 week ago
A7mkII - Any good Canon telephoto lens? Sony Alpha/NEX E-mount Talk 3 weeks ago
Who is using the Minolta Rokkor legacy lenses and what focal lengths (SRT) Sony Alpha/NEX E-mount Talk 1 month ago
Schneider Kreuznach 80-240mm Tele-Variogon f4 Sony Alpha/NEX E-mount Talk 1 month ago
Old lenses Sony Alpha/NEX E-mount Talk 2 months ago
A mount lenses Sony Alpha/NEX E-mount Talk 2 months ago
Minolta AF lens article Sony Alpha/NEX E-mount Talk 2 months ago
FE 24-240mm on the way. Sony Alpha/NEX E-mount Talk 2 months ago
A7ll Review Sony Alpha/NEX E-mount Talk 2 months ago
Commlite EF-NEX AF Converter, Mini review Sony Alpha/NEX E-mount Talk 3 months ago
Minolta 35-70/3.5 Sony Alpha/NEX E-mount Talk 3 months ago
The legacy 28mm to rule them all: Zeiss C/Y? Canon FD? Zuiko? (A7) Sony Alpha/NEX E-mount Talk 4 months ago
General question: Manual focus-lenses Sony Alpha/NEX E-mount Talk 4 months ago
How good are Helios 44m-4 and Canon FD 50mm 1.4 on NEX 6? Sony Alpha/NEX E-mount Talk 4 months ago
Teleconverters to work with E 55-210mm, A6000 Sony Alpha/NEX E-mount Talk 4 months ago
NEX-6 Upgrade Path - Decisions, decisions... Sony Alpha/NEX E-mount Talk 4 months ago
do a7II and 55-210mm play nice together? Sony Alpha/NEX E-mount Talk 5 months ago
Sigma 30/2.8 Sony Alpha/NEX E-mount Talk 5 months ago
Zeiss lenses... now made in Thailand as well Sony Alpha/NEX E-mount Talk 5 months ago
Sony VCL-ECU1 ultra-wide converter – Lens corrections? Sony Alpha/NEX E-mount Talk 5 months ago
Russian lens for A7 Sony Alpha/NEX E-mount Talk 6 months ago
Not impressed/happy with A7m2 Sony Alpha/NEX E-mount Talk 6 months ago
Older Landscape lens for the A7 Sony Alpha/NEX E-mount Talk 6 months ago
Teleconverters, NEX5N and vintage Nikkor lenses Sony Alpha/NEX E-mount Talk 6 months ago
At the Park (Hexanon 85mm) Sony Alpha/NEX E-mount Talk 6 months ago
Wide Lenses for Sony a6000 Sony Alpha/NEX E-mount Talk 7 months ago
Photographing paintings in art museums - low-light, hand-held Sony Alpha/NEX E-mount Talk 7 months ago
does pixel pitch matter? Sony Alpha/NEX E-mount Talk 7 months ago
Can someone recommend a cheap full frame a mount to e mount adapter? Sony Alpha/NEX E-mount Talk 7 months ago
Possible new FE normal zoom coming? Sony Alpha/NEX E-mount Talk 7 months ago
best value for money 50mm legacy prime for a7? Sony Alpha/NEX E-mount Talk 7 months ago
Lenses of Alpha A7 Sony Alpha/NEX E-mount Talk 8 months ago
Legacy Tessar-formula, autofocus lenses: do they exist? Sony Alpha/NEX E-mount Talk 8 months ago
Old Photo Help Wanted Leica Talk 8 months ago
why are "some" people so insulting and rude on this forum? Sony Alpha/NEX E-mount Talk 9 months ago
Picking a Prime Lens for the NEX 6 Sony Alpha/NEX E-mount Talk 9 months ago
Any suggestions for Stabilising Nex-6 while shooting pics with manual lenses Sony Alpha/NEX E-mount Talk 9 months ago
Leica Lot Leica Talk 9 months ago
Affordable way to start with Leica Leica Talk 9 months ago
A7 just died! Sony Alpha/NEX E-mount Talk 9 months ago
NEX 6 Lenses... Sony Alpha/NEX E-mount Talk 9 months ago
I'm looking for M42 to NEX Focal Reducer adapter. Any suggestions? Sony Alpha/NEX E-mount Talk 9 months ago
finding a wide legacy lens is killing me (a7)... Sony Alpha/NEX E-mount Talk 10 months ago
NEX, Tamron 17-50 (non VC), Yongnuo smart adapter. An F2.8 zoom lens alternative for APS-C Sony Alpha/NEX E-mount Talk 10 months ago
A7 + legacy lenses: Sailing to Quissett Harbor on Cape Cod Sony Alpha/NEX E-mount Talk 10 months ago
Contax CY 45mm 2.8 Tessar Sony Alpha/NEX E-mount Talk 10 months ago
Nikon G lenses on Nex 6 Sony Alpha/NEX E-mount Talk 10 months ago
Sigma 19 mm F2.8 versus Sony 20mm F2.8 Sony Alpha/NEX E-mount Talk 10 months ago