Re: Question regarding an homebuilt focusing schlieren system

Frímann Kjerúlf <kjerulf@xxxxxxxxx> · Thu, 23 Feb 2006 22:16:33 +0000

Looking forward to hear from you. 

I'm putting togeather a list of books related to this study. Seems like those Sidney Ray books would be quite helpful.  I'm currently considering two books of his called "
Applied Photographic Optics" and "Scientific Photography and Applied Imaging".  Any thoughts on these two books?  Anyone?

On 2/23/06, 
EErnest Hoeldtke <fred@xxxxxxx> wrote:

I have added your name to my address 
book.   Will postpone for now, but lens engineering was more on an art 
than engineering
and after a thousand definitions you could end 
up  starting to understand   "THE CIRCLE  of  
CONFUSION"  what a load of .. and remember that overexpose_underdevelop 
leads to blank and underexpose_overdevelop leads to blank and the circle 
of
confusions leads to blank blank blank it e 
blank.  not my ideas fred@xxxxxxx

  ----- Original Message ----- 

From: 
  Frímann Kjerúlf 

  To: 
List for Photo/Imaging 
  Educators - Professionals - Students 
  Sent: Wednesday, February 22, 2006 7:24 
  PM
  Subject: Re: Question regarding an 
  homebuilt focusing schlieren system

  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 

-- 

Best Regards
Frímann Kjerúlf