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04-21-2008, 08:51 AM   #1
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Who has the fastest lens on a DSLR?

Hello everyone,
I seen the post about the oldest lens and got the idea to ask about the fastest lens on a DSLR. I broke out my Canon 50mm F0.95 normal lens from my Canon 7S rangefinder camera of the late sixties. The registration distance at 28.95mm is not even close to the 45.5mm of my Pentax. Even the 4/3rds bodies are much to far at 38.67mm. I tried it anyway. I couldn't focus further then six inches from the subject and the depth of field is paper thin at F0.95. As you can see, I have too much free time. What is the fastest lens that you have tried on your DSLR and what were the results?

DaveAttachment 11123

Attachment 11124


Last edited by Big Dave; 08-10-2008 at 03:44 PM.
04-21-2008, 09:00 AM   #2
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Well unless someone here has an X-Ray lens, I don't think any Pentax shooter can beat that insane 0.95. And strictly speaking, that's not even an SLR lens . Most insanely fast 35mm lenses are RF type anyway.
04-21-2008, 09:15 AM   #3
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Now there is a lens I'd love to get my hands on! If I'm not mistaken, there isn't a 'faster' lens out there. How... did you mount that on the K100? Love to see some more shots with it Dave!
04-21-2008, 09:24 AM   #4
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I think that Zeiss made a f0.7 for Stanley Kubrick's Barry Lindon, but it was for a movie camera. I am used to f0.75 or f0.8....on microscopes

04-21-2008, 09:27 AM   #5
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I want one.
04-21-2008, 10:20 AM   #6
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I'll be willing to bet, the fastest most can claim to is f1.4 (SMC 50mm f1.4 in my case) some have an F1.2

With respect to the cannon lens, did you ever consider an extension tube?

my set is 12, 20 and 26.

the 20mm would get you close to the right distance you actually need 17.55mm
04-21-2008, 12:19 PM   #7
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You could buy the camera below, modify it similarly, and mount your canon lens on that -- you'd have a super fast super telephoto. I'd be curious to see what kind of resolving power you could acheive with such a extreme crop.

Instructions for Converting Logitech Quickcam Pro 9000 Webcam for Telescope Use -by Gary Honis
04-21-2008, 12:27 PM   #8
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QuoteOriginally posted by Lowell Goudge Quote
I'll be willing to bet, the fastest most can claim to is f1.4 (SMC 50mm f1.4 in my case) some have an F1.2

With respect to the cannon lens, did you ever consider an extension tube?

my set is 12, 20 and 26.

the 20mm would get you close to the right distance you actually need 17.55mm
This is just for fun. The lens is about 20mm further from the sensor now then it should be. This is why the lens focuses at six inches when set to inifinity. The depth of field is about 3/32" at F0.95. The lens is fine on the range finder, but it does block part of the view finder.

Dave

04-21-2008, 12:34 PM   #9
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QuoteOriginally posted by thePiRaTE!! Quote
Now there is a lens I'd love to get my hands on! If I'm not mistaken, there isn't a 'faster' lens out there. How... did you mount that on the K100? Love to see some more shots with it Dave!
I just mounted it with a M42 adapter. The lens seated in the adapter and held in place with large rubber bands. It worked ok for a couple shots in the backyard. I thought that it would look cool on a DSLR body.

Dave
04-21-2008, 12:42 PM   #10
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QuoteOriginally posted by konraDarnok Quote
You could buy the camera below, modify it similarly, and mount your canon lens on that -- you'd have a super fast super telephoto. I'd be curious to see what kind of resolving power you could acheive with such a extreme crop.]
I think that from now all of my shooting with this lens will be with the RF body that it came with. It takes great pictures in very low light. I have had this system for over thirty five years now. The 35/f2 is very small and the 135mm about as long as found on any range finder. It has become a classic with the fast lens.

Dave
04-21-2008, 01:06 PM   #11
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QuoteOriginally posted by Big Dave Quote
I just mounted it with a M42 adapter. The lens seated in the adapter and held in place with large rubber bands. It worked ok for a couple shots in the backyard. I thought that it would look cool on a DSLR body.

Dave
haha, brilliant! It does look great, one very serious prime.
04-21-2008, 04:20 PM   #12
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QuoteOriginally posted by Lowell Goudge Quote
I'll be willing to bet, the fastest most can claim to is f1.4 (SMC 50mm f1.4 in my case)
So far the fastest that I've used is a 55mm f1.8.

However I'll be given a 50mm f1.4 in a couple of days. The old saying "You get what you pay for" is honest in this case. I'll have to take it apart and clean it before I can use it
There's literally a dead bug in it, along with a bunch of sand
04-21-2008, 05:21 PM   #13
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i have tried rodenstock TV-Heligon 42mm F/0.75 heh it was the sweetness (sadly mounted on a canon camera)

i will liberate it from its shackles some day!
04-21-2008, 05:32 PM   #14
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How did you get those Rodenstock? I looked for them on eBay, but I couldn't find them. There are several other Rodenstock cine lenses that I tried to find, no luck as well.
04-21-2008, 05:34 PM   #15
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FAST LENS!! Rodenstock TV Heligon F0.75!!! 50mm .. - eBay (item 120248471419 end time Apr-23-08 21:56:13 PDT)

there you go. buy it if you can find a way to mount it.

(just to make it clear: i do not own one myself, i only tried one from my friends crazy lens collection. he is worse than me!)
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