David
That may be part of the problem. I plan to pull the mirror out tonight and
check. I don't think I have an incheck to play with but I may be wrong.
Thanks
Mike
On Apr 22, 2017 3:02 PM, "David Luders" <LudersDG@xxxxxxx> wrote:
Michael, perhaps your Orion 16" Dobsonian's mirror is too far forward. Is
there a way of adjusting your primary mirror so that it is closer to the
ground, away from the secondary mirror? I recently had a similar problem
with my classic Edmund 4-1/4" Reflector, but in that case the mirror was
too far away from the focuser: https://www.cloudynights.com/
topic/573299-classic-edmund-425-reflector-cant-focus-with-
plössl-eyepieces/ . According to the sales literature, your Orion may
actually be f/4.4 (per http://www.telescope.com/Telescopes/Dobsonian-
Telescopes/Truss-Tube-Dobsonians/Orion-SkyQuest-XX16g-GoTo-Truss-Tube-
Dobsonian-Telescope/pc/1/c/12/sc/29/p/102659.uts ).
------------------------------
*From:* sas-bounce@xxxxxxxxxxxxx <sas-bounce@xxxxxxxxxxxxx> on behalf of
Michael Finch <michael.finch96@xxxxxxxxx>
*Sent:* Saturday, April 22, 2017 2:06 PM
*To:* sas@xxxxxxxxxxxxx
*Subject:* [SAS] Foucault Tester
Does anyone in the club have a foucault tester? I have a new 16" f4.5 and
I believe it may actually be f4.7(ish) based on having to rack the focuser
out all the way and insert the eyepiece only about 1/2 way into the
focuser. If if is infact greater than f4.5, I need to send it back but
want to be sure.
Thanks
Mike
_____
Message from:
Michael L. Finch
Spokane, WA 99208
E-mail: michael.finch96@xxxxxxxxx
