Re: [ATM] Baffling Wynne corrector

[Polaraligned <polaraligned@optonline.net>]

>
>>I have already moved the corrector back 2.5" but because of the large
>>size of the focuser opening and large corrector lens, stray light still
>>has a clear shot at the first lens.
>
> It would help me to see a drawing, to prevent any misunderstanding or
> confusion.  If nothing else, email me a drawing and I'll see what advice I
> can offer.

Tom,
I am going to try to get some of my AutoCad drawings posted in the
near future.


>
>>Do I really need to be able to have this corrector placed so
>>no stray "rays" of light hit it?  I don't mean by reflection, I mean
>>direct "rays".
>
> Probably not, unless you have the moon or streetlights shining on the 
> front
> lens.  Think of a camera lens...stray rays shine on it all the time while
> you take photos...and unless a very bright source (that is not in the 
> field
> of view of the film frame) is shining on it...you don't complain about the
> resulting image quality.


Right.  And I guess the same could be said about a refractor telescope-
because the objective is out in the front for all sorts of "indirect" rays
to hit it.  Stray light has to follow the laws of optics and most rays will
never make it to the sensor.  I was worried about baffling the first
Wynne lens because so much has been made of baffling focusers, and
I assumed that this is so that no light hits the first eyepiece lens.
I think I understand now.
Thanks very much for the help here.  Seems that most of the optical
guru's on this list were very "baffled" by my question.

Thanks again,
Scott



>
> Tom Krajci
> Cloudcroft, New Mexico
> http://overton2.tamu.edu/aset/krajci/
>
>
>
> -- 
> No virus found in this outgoing message.
> Checked by AVG Free Edition.
> Version: 7.1.362 / Virus Database: 267.13.11/191 - Release Date: 12/2/2005
>
> _______________________________________________
> ATM mailing list http://www.atmlist.net/ 

_______________________________________________
ATM mailing list http://www.atmlist.net/