Discuss non-DSLR models (e.g. Coolpix cameras), other camera brands, your latest cool photography gadget, computer stuff and other photography related issues that don't fit in the Vintage Kodak and Nikon DSLR forums.
What can you do when it is cold outside and you're free? Just play a bit with strange optics: here one of the world's fastest lenses ever build on my Nikon D1.
This lens was made for X-ray devices; there are versions with focal lengths of 65 mm and 150 mm., all with a maximum aperture of f/0.75. Optical formula is 7 elements in 4 groups, no aperture and fix-focus. For close-ups interesting, as you may see below.
Hi Kiu, I used a BR-2 ring with a rubber clamp. I am still working on a serious mount. I need a (step up/down) ring with 80mm. thread. DOF is almost non-existing and infinity isn't possible when mounted on a SLR. Maybe I'll convert an old Coolpix. The difference between the Rayxar and the f/1.2 - Nikkors is just 1.5 stop...........and 400 gram!
Regards,
Nico
As the working distance is extremely short I've removed the rear lens group (2 elements) and replaced it by a Nikon eyepiece correction lens (+1) in order to increase the exit pupil (aka Ramsden disc) and working distance, which is 50 cm. now. See below the results. I am going to try to use other lenses to obtain infinity. (German Black Wood 'Rauchermännchen')
Regards,
Nico
