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May 4th, 2007, 11:53 AM
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#1 |
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Tourist
Join Date: Apr 2007
Location: Berkeley, CA
Posts: 3
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Relay lens for HD100?
Would this lens work as a relay between the HD100 and 35mm adapters like the Brevis and M2?
Schneider Optics Cinegon 1/3" 5.3mm F2.0 C-Mount Minimum object distance - 70mm (2-3/4") 52mm thread $1525 at RMA Electronics http://www.rmassa.com/manu/schneider.htm http://www.rmassa.com/specsheets/21-036939.pdf |
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May 4th, 2007, 12:26 PM
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#2 |
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Inner Circle
Join Date: Dec 2003
Location: PERTH. W.A. AUSTRALIA.
Posts: 4,477
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I dont think so but I am not a lens tech so don't take too much notice of my comments. For that price you might be better off trying a 28mm or 35mm SLR camera lens. At least you can use them on front if they don't work as relay.
Quyen Le uses 50mm Minolta for the Letus35 HD and that images a smaller area off the GG than his other models for lens-in-camera camcorder types. 40mm - 45mm might be better. 5.4mm may be way too wide. Shorter "in air" distance from flange to focal plane of the c-mount may be a problem. It is 17.5mm. |
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May 5th, 2007, 09:52 AM
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#3 |
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Regular Crew
Join Date: May 2006
Location: harlem ,nyc
Posts: 77
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hd100 relay
these guys are working on one for the hd100 . info@lensmounts.com www.lensmounts.com
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May 7th, 2007, 05:22 AM
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#4 |
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Regular Crew
Join Date: Mar 2007
Location: Paris
Posts: 72
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i'm thinking about using one of those lens as relay: very fast (f0.5 to f0.9)
http://www.muellerworld.com/exhibits/fast_lens/ light matters ! but i need to use a closeup lens with it and ability to focus on the ground plane of the 35mm adapter. what's about it ? |
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May 7th, 2007, 04:51 PM
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#5 | |
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Regular Crew
Join Date: Jan 2007
Location: Tampa, FL
Posts: 195
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Quote:
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May 7th, 2007, 05:47 PM
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#6 |
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Regular Crew
Join Date: Mar 2007
Location: Paris
Posts: 72
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very good question, still searching :)
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May 8th, 2007, 12:27 AM
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#7 |
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New Boot
Join Date: Jan 2007
Location: Norway
Posts: 18
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Shoot me if I'm wrong, but wouldn't just about any slr-lens work as a relay as long as the distance between the lens and sensor is appropriate?
A good slr-lens and an extension tube with the correct mounts would do fine. |
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May 8th, 2007, 04:45 AM
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#8 |
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Regular Crew
Join Date: Sep 2006
Location: Atlantis
Posts: 58
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I posted this some time ago. I got it from google somewhere.
Maybe its useful for someone. Its a selfmade relaislens for the canon xl cameras. http://www.jetsetmodels.info/pics/relaislens_1.jpg best regards Daniel |
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May 8th, 2007, 06:44 PM
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#9 | |
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Regular Crew
Join Date: Jan 2007
Location: Tampa, FL
Posts: 195
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Quote:
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May 9th, 2007, 03:35 AM
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#10 |
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Regular Crew
Join Date: Sep 2006
Location: Atlantis
Posts: 58
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Hi Jon,
no that wasnt for selling. I found this jpg somewhere on the net for do it yourself. Also I saw that lens Schneider Kreuznach 1:0.95 / 25mm some time ago for under EUR 100,- in ebay. |
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May 9th, 2007, 05:44 AM
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#11 |
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Trustee
Join Date: Apr 2005
Posts: 1,269
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Yeah, I remember when that picture was posted here and everybody was saying that the P+S used this Schneider 25mm F0.95 as the Mini35 relay. I even bought one of them. What a waste of time and money. That lens is a C mount, which has a FFD of 17.5mm making it impossible to be used on a XL2 or HD100 unless for extra mega ultra macro close up. I'm talking about having a penny up to the front element touching the glass and only being able to get the letters EN from the word CENT written on the coin. Useless. No C mount lens will work as a relay. The P+S lens is made by them specially for the Mini35.
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May 9th, 2007, 09:17 AM
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#12 | |
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Regular Crew
Join Date: Jan 2007
Location: Tampa, FL
Posts: 195
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Quote:
Does anyone know if you can buy the P+S relay lens separately? From where? How much? |
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May 10th, 2007, 04:39 PM
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#13 |
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Regular Crew
Join Date: Nov 2006
Location: Cary, NC
Posts: 132
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Hey Eric, you ever find out if those lenses from Muellerworld would work?
What we're finding - and i'm not sure exactly how it works. But even if you have a "fast" lens like say 1.7 (not very fast i know) (like the letus 35's minolta) you can't even take advantage of that, because when you open it all the way up, you get serious blooming (chromatic abberation) and it's useless. It basically overloads the little 1/3" ccd (i think). SO what we're working on now, is using the Fujinon as our Relay lens, because it is focusing the right size image the CCD's need, and its actually a fairly fast lens (1.4). However, the macro ability in the Fujinon, isn't substantial enough to focus on the image when you zoom in on the GG to fill the screen. So you need a macro/achromat between the Fujinon and the GG to zoom the image on the GG enough, but prevent chromatic and spherical abberations. We haven't found a suitable macro within our reach yet, and we're afraid of spending 400 dollars on one that may or may not work. We're working on something kind of sketchy now that may or may not solve the problem so i'll let you know how that goes. Has anyone else noticed the blooming/chromatic abberation when using a normal 35mm slr lens as a relay lens with the hd100? Just thought i'd throw our process out there, it may be interesting to some of you. Thanks Dale |
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May 11th, 2007, 09:11 AM
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#14 |
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Tourist
Join Date: Apr 2007
Location: Berkeley, CA
Posts: 3
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What about this lens: http://www.rmassa.com/specsheets/TF25DA-8B.pdf
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May 11th, 2007, 10:26 AM
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#15 | |
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Regular Crew
Join Date: Jan 2007
Location: Tampa, FL
Posts: 195
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Quote:
* min. focus distance is 0.2 meters (not close enough) * C mount (someone said they won't work) |
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