The instructions note that you can loosen the 'do not loosen' screws to readjust the reticle if it's moved during shipping,
You can never adjust the reticle, it is permanently affixed inside the eyepiece. However the eyepiece is simply held in the back of the polar scope via a small setscrew, and this entire assembly can be rotated. We made this so you can do fine adjustment of the vertical reticle line in the field. Even if you are off several degrees it has very little if any effect on the actual polar alignment.
From: Terri Zittritsch <theresamarie11@...>
To: main <firstname.lastname@example.org>
Sent: Thu, Apr 16, 2020 12:27 pm
Subject: Re: [ap-gto] RAPAS on Mach2
On Thu, Apr 16, 2020 at 11:17 AM, uncarollo2 <chris1011@...> wrote:
Roland, I didn't expect you to respond. The RAPAS feels like the rest of the kit I have from AP, solid and built like a tank! Being an engineer, I can appreciate it all.
Throughout the instructions I received, in numerous places, are notes to make sure the mount is level which is why I asked. It didn't take long to think about the implications of the mount not being level, or more accurately, the RAPAS not being precisely vertical, on the accuracy on polar alignment. The instructions note that you can loosen the 'do not loosen' screws to readjust the reticle if it's moved during shipping, but doesn't seem to be part of the normal (do every time) alignment process. At least not in the instructions I have, so thanks for sharing this.
I'm just trying to understand whether there is any way to do really accurate polar alignment, 30" or less, in order to do short unguided exposures, without going to the traditional drift alignment.. I've found drift alignment to be a miserable process to go through. Life is too short, and clear skies much shorter! I'm not setting up on a level surface, or on a pier, every night is different. Since I have all of the equipment, guiding is not a terrible thing to have to do. I'm just thinking I have this really really nice mount, and is there any way to take advantage of it's full capability in a portable situation.