Yeah, in my last I was speaking of the possible dust on the primary. Concerning your last, you are probably seeing the shadow from the secondary. I can see it when I look for it with a 40mm plossel, but have calculated that my eye can't use more than a 26mm. Can't remember for sure but that works out to something like 1.5 degrees true field. Out of curiosity, how many rings can you see on a star test? I consistently loose count at around 10. Also did they get rid of the primary clips covering the edge of the mirror? Stan Clark webmaster saguaroastro.org ---------- Original Message ---------------------------------- From: "Stanley A. Gorodenski" <stan_gorodenski@xxxxxxxxxxxxx> Reply-To: az-observing@xxxxxxxxxxxxx Date: Tue, 31 May 2005 18:31:58 -0800 >Stan, >I'm wondering if it could be the eyepiece. I'll do some testing tonight. >I was told by one of the sales reps that with a 50mm eyepiece I would >see an image of the diagonal and that how high up one can go on the mm >of the eyepiece depends on the age of the observer. The eyepiece that >comes with it is a 26mm plossel. This afternoon I noticed I could >distinctly see a dark concentration at the center of the field which I >could not make disappear no matter how far away I moved my eye. I tried >my 26 mm orthogonal and was able to find an in between distance where >the dark concentration disappeared. I went to my 32 mm erfle and could >make it disappear by hugging the eyepiece with my eye. I tried my 55mm >plossel and it gave a great image with no dark concentration over a wide >range of distance from the eyepiece. >Stan > >cvsc1 wrote: > >>Stan, >>I had the same thing happen on my 10" LXD55, it caused me to freak out. >>happened about a week after I got the scope. At first I thought it was >>something on the corrector, as i had got it dewed up pretty good. Then upon >>closer inspection the next morning I realized it was actually on the primary. >>Funny thing is I have no clue what caused it. 3 days later the optics were >>clear & it has never happened again. >> >>Stan Clark >>webmaster >>saguaroastro.org >> >> >> >> >> > >-- >See message header for info on list archives or unsubscribing, and please >send personal replies to the author, not the list. > > -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.