I've been using mostly refractors, so bear with me.
With Jupiter and Saturn headed higher, I wanted more aperture, so I ordered the
8" Classical Cassegrain. Props to Orion for prompt shipping. I ordered it
Sunday evening they shipped it Monday, and arrived yesterday, Tuesday.
I guess I'm lucky that they ship from just a couple of towns over from
where I live.
During the day I pointed it at a distant cedar tree, which is far enough away
that I use it to get a rough set up for optics before the sunset.
I would describe the daytime view through the eyepiece as "soft." With other
scopes I can see detail on the bark and needles, but could not with the CC8.
Also, the range of focus with a 55mm Plossl, and a 25mm ES 100 were wide,
i.e. focus didn't change much as I moved the focuser, i.e. low speed would
be virtually unnecessary. The diagonal was the same Tele Vue Everbrite used
with other scopes, so no problem with the rest of the equipment.
Later in the afternoon, I put in the included collimation cap and
was able to adjust the secondary to center the circle, but could
not see the ring of light supposedly indicating the primary's
collimation. I ordered a Cheshire eyepiece which hasn't
arrived yet, and will give it a go.
I set it up at last night and viewed the Moon. Same thing. I set up my 5"
refractor with the similar magnifications of 44x and approx 100x, and
it wasn´t even close. Tons of easily seen detail with the refractor, but
soft images lacking detail through the CC8. Not even close.
The primary mirror looks fine from the outside, and nothing appears
to be wrong with the scope.
Is this typical for a Cassegrain out of collimation, normal, or am I
Edited by rexowner, 21 July 2021 - 09:41 AM.