I guess I could guesstimate the focal point by measuring 43” back from the front of the objective and then measuring how far it is from that point to the focuser barrel. -- Dean

However the various adapters that AP makes adapt the Kenko polar scope to the English threaded holes on various AP mounts. They make more than one bushing adapter. I don't know which one you have.

The PASILL polar scopes are made by Kenko in Japan. Yes, metric threads.

Hi Well it turns out that the diameter of the threads is very different than the Passil4 on the 900. Which is strange...The diameter of the threaded part is 1.016 inches and the threading is not

Thanks Stuart. Sounds good. I figure that having the camera in focus with the focuser barrel about 1” extended would be a good place to be. So I was hoping to avoid that situation I am sure we

Dean, without a rear element in the imaging train, I think you can put the darn thing wherever you want and just bring it to focus. If you have a FF or Reducer/Flattener in play, they only deliver

OK, now I am hearing from the scope's owner that the 86.5 number is the spacing for the flatener - which I do not anticipate that we will need with a 4/3" sized detector (the same size as a 8300 CCD).

The DC connector on the CP5 is a round 2 pin Hirose connector. You received a power supply cord with Hirose connector on one end and power poles on the other. The 24 volt AC-DC supply that came with

Thanks for everyone's suggestions, but humbly I have no idea what a Hirose connector is, and can't find them. The connector on my 24V supply that came with the Mach2 seems to be a standard red/black

Best not to cut the 12 or 24 volt cords because DC at that power level loses voltage for every meter of length added. Best to use an extension cord on the AC side where you can go 100 meters without

My concern is if people cut their power cords to extend them over greater distances to just make sure they don't set themselves up for future problems. -Christopher Erickson Observatory

The Mach2 power supply does not use Anderson power poles. It uses Hirose connectors. This 24 volt supply should never be used to power anything else, no matter how tempting. It is ONLY to be used to

Woops, replied to wrong post. Rolando

The Mach2 power supply does not use Anderson power poles. It uses Hirose connectors. This 24 volt supply should never be used to power anything else, no matter how tempting. It is ONLY to be used to

I have seen it before where bad PEC data causes all kinds of guiding grief. The manual PEC training function in the hand controller, combined with a transient user was the culprit. -Christopher

And MAKE SURE that you use a different style of connectors for the 24V power supply and 12V supply. You don't want to connect 24V to your precious camera or other 12V devices. Anderson makes powerpole

One of my observatory partners has an AP155 EDFS with the 2.7" focuser and are going to put it on the Mach2 and try some unguided imaging with it with my small pixel ASI1600MM CMOS camera. His

If the encoders are turned off, then yes, you will have PE. Drift is not something the encoders can fix. We have a utility that allows you to turn the encoders on or off. Also you can do it in APCC.

Hello Roland, Thanks a lot. That is interesting. So I guess this is PE with drift. I do have encoders on the mount though. Is it possible that encoders are not working? Regards Hemant

By the way, the majority of the tracking error in your images is drift due to polar misalignment and the fact that you are not using a model. For such a large scope and long focal length you really