Re: ATM Secondary Mirrors

[Gary Seronik <gseronik@direct.ca>]

At 03:56 PM 6/13/97 -0400, Dave McCarter wrote:
>The other day I was out observing, and noticed while some one else was
>looking at the moon through my scope that a ring of light was passing
>around the diagonal mirror! This is a MEADE STARFINDER 10", and in the
>catalog the secondary is listed as 2.60 inches. I measured it when I got
>home, and found it was 2.25 inches. Mel, run that through your vignette
>program! Man am I steamed!

Dave:

I've seen a few of these.  The story apparently goes something like this...

Meade makes two versions of these scopes:  a strictly visual model with a
small secondary and the mirror dropped back and a photo-visual model with
the mirror pushed up and the larger secondary.  More than a few were
shipped with the wrong secondary for the mirror placement.  If you look at
the back end of the tube, you should see two sets of holes for mounting the
primary.  Your problem might be solved by dropping the mirror back and
using the second set of holes.  All this assumes much, so I could be off
with respect to the scope you have in your hands.  Would dropping your
mirror back allow using the 2.25" secondary?

Regards,
Gary Seronik