Mike,

I had some debris in my OTA and was able to get it out very quickly. Use a
small diameter plastic tube connected to a vacuum cleaner...use tape to get
a good seal. Go in from the back of your OTA and turn the vacuum cleaner
on. Hope this helps.

Al
----- Original Message -----
Sent: Saturday, January 01, 2000 9:11 PM
Subject: [M]: How Much Dirt is Too much Dirt


> Hi Mapugers,
>
> This is a strange question, but maybe some of you guys can help out a rank
> novice. I just received shipment of a new 8" SCT tube which I am mounting
on
> a Losmandy CG8 mount.
>
> There two problems. (1) The mounting plate is skewed so that the optical
> axis of the tube is skewed by a little over a degree from the polar axis
of
> the mount. The angle is quite visible visually, but the company I got it
> from says no big deal. I guess the mount can compensate, but it seems
> excessive to me. (2) The bottom of the tube has a lot of aluminum
shavings,
> maybe 15-20 sizeable slivers, apparently from the holes used by the
> manufacturer to put on the mounting plate. Also the primary appears
visibly
> dirty. Not finger prints, but dozens, perhaps hundreds, I don't know, a
lot,
> of dust specs. I know it sounds like a dunb question, but is this stuff
> normal in a mass market tube? It comes from a reputable company but they
> were downright rude when I questioned them. I know it's a strange
question,
> but if someone could enlighten me OFFLINE as to whether I am being
> unreasonable or not, I would appreciate it. I would have thought that a
> primary mirror straight from the factory would be clean enough that it
would
> be difficult to find dust on it.
>
> Thanks,
> Mike
>
>

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