Bill, Andy
When you talk about surplus copy lenses, are you talking about lenses from photocopy machines? I've just opened up an old photocopier machine I had in my garage, and there is no usable lens in there.
Surplusshed.com looks like a good source, but now it comes down to my lack of knowledge in lens engineering. From the little I know then my guess is that two lenses like the
L4146
| from the surplusshed website, stacked together, might do the trick. That lens is: |
TYPE: Double Convex
DIAMETER: 35.5 mm
FOCAL LENGHT: 444 mm
COATED: no
Also, I'm getting pretty curious on lens science. Any good hints on website or books that might be helpful?
regards
Frímann
On 2/20/06, wpettit@xxxxxxxxxxxxx <wpettit@xxxxxxxxxxxxx> wrote:
Frimann,
If you can't obtain surplus copy lenses at your location, check out http://www.surplusshed.com I've bought a lot of surplus optics from them and they are a relible supplier. I'm sure they can ship internationally.
Bill
-----Original Message-----
>From: Fr�mann Kjer�lf < kjerulf@xxxxxxxxx>
>Sent: Feb 20, 2006 4:24 PM
>To: List for Photo/Imaging Educators - Professionals - Students < photoforum@xxxxxxxxxxxxxxxxxxxxxx>
>Subject: Question regarding an homebuilt focusing schlieren system
>
>Hi there
>
>
>I'm currently planning to set up a focusing schlieren system as a
>project at my school.
>
>I'm using the technique andrew davidhazy describes on his website:
>
>http://www.rit.edu/~andpph/text-schlieren-focus.html
>
>My question is: Will this setup work with my Canon EOS / FD lenses ?
>
>What I have is :
>50mm f/1.4 FD by Canon
>50mm f/1.8 EOS by Canon
>100mm f/3.5 by Vivitar
>100-300mm f/4.5- 5.6 by Canon
>
>Andrew says on his site: "It is desirable to use a large aperture,
>relatively long focal length lens for the imaging lens. Some surplus
>copier lenses can be applied for this purpose. "
>
>So I guess my 50mm lenses will not do the trick?
>
>
>Thanks in advance for any answers
>Fr�mann Kjer�lf
>
--
Best Regards
Frímann Kjerúlf
