From: "milton_aupperle" <milton@outcastsoft.com>

Date: January 5, 2010 11:08:23 AM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: mark on Flea 2 glass..

Yes that's what I mean. My Hand lense (from my Geologist days) is 20x power and I use that too look for dust on my optics and cameras.

HTH..

Milton Aupperle

--- In Astro_IIDC@yahoogroups.com, Mark Gaffney <markgaffney@...> wrote:

If you mean a basic magnifying glass I can probably lay my hands on  

one of those...?

Mark.

On 06/01/2010, at 4:07 AM, Milton Aupperle wrote:

Hi Mark;

I finally got back yesterday and now have enough bandwidth here to  

look at your image.

I don't know where that large mark is.

If you have a high power magnifier, you may be able to tell if it's  

a divot / pit on the outer glass cover or a clump of dust on the CCD  

glass cover itself. Basically just shift the focus of the lens from  

one surface to the other.

HTH..

Milton Aupperle

On 30-Dec-09, at 10:20 AM, Mark Gaffney wrote:

Hi Milton,

I`ve added that photo of the mark evident on my Flea 2`s screen at

short FL (somewhat compressed) to my "C9.25 set-up..." page in Photos

on the group...Maybe this link`ll work to it;

http://groups.yahoo.com/group/Astro_IIDC/photos/album/705235801/pic/1256996719/view?picmode=&mode=tn&order=ordinal&start=1&count=20&dir=asc

Mark.