Fastest lens? (f/0.75 x-ray lens)

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nikonnl
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Fastest lens? (f/0.75 x-ray lens)

Post by nikonnl »

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.
Image
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.
Image

Regards,
Nico

http://www.nicovandijk.net
Last edited by NikonWeb on Mon Dec 20, 2010 1:25 pm, edited 1 time in total.
Reason: Modified subject
D1/D1X/D1H/D2H/D2X etc.
NIKON KIU
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Joined: Fri May 20, 2005 9:25 pm
Location: Washington DC USA

Re: Fastest lens?

Post by NIKON KIU »

Hi Nico,
How did you mount it? Is it F mount? :o

Kiu
Lets talk Nikon
nikonnl
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Re: Fastest lens?

Post by nikonnl »

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

www.nicovandijk.net
D1/D1X/D1H/D2H/D2X etc.
nikonnl
Posts: 163
Joined: Sun May 07, 2006 2:51 pm
antispam: No
Location: South-Holland
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Re: Fastest lens?

Post by nikonnl »

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.
Image
(German Black Wood 'Rauchermännchen')
Regards,
Nico

http://www.nicovandijk.net
D1/D1X/D1H/D2H/D2X etc.
NIKON KIU
Posts: 327
Joined: Fri May 20, 2005 9:25 pm
Location: Washington DC USA

Re: Fastest lens? (f/0.75 x-ray lens)

Post by NIKON KIU »

The difference between the Rayxar and the f/1.2 - Nikkors is just 1.5 stop...........and 400 gram!
Let's not forget the ever important focus ring and aperture control...

:lol:


Kiu
Lets talk Nikon
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