On Thu, Feb 11, 2021 at 10:20 PM, Peter Nagy wrote: Bob, With or without pointing model using APCC Pro? Peter Hi Peter With a pointing model. I would assume several minutes would be achievable? How

What the hell are you doing bringing common sense to the party! The perfect, simple, cost effective solution to the problem! Brilliant! Steve 8>)

Probably not. I was doing unguided imaging with an encoder mount. I apologize if I misled anyone. A mount that does not have shaft encoders is open loop and is at the mercy of the periodic error that

Bob, With or without pointing model using APCC Pro? Peter

On Tue, Feb 9, 2021 at 11:15 PM, Roland Christen wrote: I have gone up to an hour with 1000mm FL and 5.4 micron pixel camera. -- Roland Christen Astro-PhysicsFirst, excuse me for asking for

As per Roland a year ago answering one of my questions regarding APPM and camera rotation between sessions: Quoting Roland: (That is correct. The camera does not do anything as far as mount

Great job Dean! Don Anderson On Wednesday, February 10, 2021, 11:19:50 a.m. MST, Dean Jacobsen <deanjacobsen@...> wrote:

Thank you Roland and Christopher. Encoder measurement is the obvious choice in hindsight.

A precision encoder is attached to the RA axis and the resultant PE error is measured using software similar to PEMPro. We do about 5 cycles for each mount (takes about 1/2 hour for that measurement).

On Wed, Feb 10, 2021 at 10:39 AM, Roland Christen wrote: Looks good. What is the pixel size binned 2x2?Yes, this was with the 4.63um 2x2 binned pixel configuration. Gain 120 and 240s exposures taken

My guess is a custom bench top jig with an absolute encoder. -Christopher Erickson Observatory engineer Waikoloa, HI 96738 www.summitkinetics.com

This question is simply to satisfy my curiosity. To create the factory installed PEC curve I assume each mount must be tested and track a star like source moving at sidereal rate for several worm

Thats the 4.63um mode (14 bit) on the camera. Bin 1x1 on the camera is 2.3um pixels (but 12 bit). It is kind of like two cameras in one in a way. Specs:

Looks good. What is the pixel size binned 2x2? Roland

My trusty Mach2 kept me right on the mark. -- Dean Jacobsen http://astrophoto.net/wp/ Image Gallery - http://astrophoto.net/wp/image-gallery/ Astrobin Image Gallery -

wonderful detail!-- Brian Brian Valente portfolio brianvalentephotography.com

Here is the final iteration: https://www.astrobin.com/full/0ffdnz/E/ The full res version is viewable by clicking on the button at the upper right corner. I really like the amount of detail that can

And, don’t forget 2.5 hour drives to a dark site!🥺 //Marty is mobile Ad Astra

Brian, Oh yeah, you’re missing out on all the “fun” of portable observing – which includes sore muscles, barked knees and elbows, dust, insect bites, wild animals, dust, cold – and did I

People use counterweights? Sent via the Samsung Galaxy Note9, an AT&T 5G Evolution capable smartphone