I see. WEll perhaps Jerry would consider having a "quiet" mode slew. But honestly, the sound is low enough that in my experience, the sound is compatible with star parties. Slewing more quietly

There are 206265 arc-seconds per radian so the formula is the conversion between an angular value to a linear scale at the image plane. The value is 206.3 (rounded 206.265) because of the FL being in

Doug, here is a table that might help. Otherwise Peter Zelinka on You Tube explains the formula in his video choosing your first dedicated astronomy camera. -- Harry Vero Beach, FL Mounts: ES iExos

Thank you all for your help, I will try switch guiding from my guide scope (162 mm) to my imaging scope (480) and see if guiding improves next time I have clear skies. That will give my a pixel scale

Hey Doug, The formula is:pixel size (microns) x 206.3 /focal length in mm = image scale in arcsec/pixel 206.3 results out of:3.6 * (180 degrees / pi) = 3600/1000 * (180 degrees / pi) = 206.26 Doug

Jerry, Where does the 206.3 in your formula come from, and what are its units? Doug

Thanks for your reply Wes, When in my backyard, the slewing noise is fine, I am thinking about when I'm in a campground, with close neighbors, slowing the slew speed down would reduce the whiling

Rob The pmc8 manages its own slew speed. The ascom driver executed a specific command to the pmc8 which takes it from there. What is it about the programmed speed you feel the need to

Good Afternoon, Using the PMC* connected via \serial, and slewing commands sent by Stellarium, I am trying to adjust the slewing speed a bit slower. Using the ASCOM Profiler, I simply cannot find the

Hi Walter, Yes, I would suggest a 2x Barlow or tele-extender instead of a 3x. The formula for pixel or plate scale is: Pixel Scale = (Pixel Size x 206.3) / FL, So for your combination: Pixel Scale =

Hi Doug, That would work if you get get the camera to the focus position with the Barlow or tele-extender. I would suggest trying it at 2x instead of 3x. -- Jerry Hubbell Vice President of

Hi Jerry, Thanks for looking at the logs. I went for the Orion guiding package because of its popularity. I thought it would be more than enough to guide my ED 80 at a 2 arc-sec/pixel imaging scale,

Hi Jerry and Walter, Would it be possible to use a 3X Barlow in the guiding scope to increase the guiding to the 2 to3 arc-seconds you suggest? Doug Doonan

-- Rob Kitchener, Ontario EXOSII-PMC8 Mount Starwave 80ED Starfield 50mm/ZWO ASI Guide Scope Altair 224c/ZWO 183MC

Hi Walter, I am just starting to look at your guide log, but I did notice that your guide camera (an Orion Starshoot Autoguider) with a 5.8 um pixel coupled with your very short focal length guide

Hi Everyone, I am pretty new to the hobby, jus went out a few times with my EXOS2-GT PMC-eight. My first struggle with this mount was a ~ 3-4" wiggling in RA I could not get rid of. RA basically kept

Parag Nice image! My guess is APT stopped at meridian. Look into that. Wes -- Wes, Southport NC EXos2-GT PMC-8, iExos 100 ES ED 127, 10" LX200GPS+wedge, Astro-Tech 8" Newt, ETX-90, 60mm no-name

My first DSO with iEXOS-100 and just a DSLR unguided. Stack of 55 images 60 sec at 500 ISO and f/8. Very happy with this little mount! Thank you for this forum members for providing guidance to a

Rix: I don't think you are correct. Can't wait to see the outcome. Wes. -- Wes, Southport NC EXos2-GT PMC-8, iExos 100 ES ED 127, 10" LX200GPS+wedge, Astro-Tech 8" Newt, ETX-90, 60mm no-name guide

No guiding. This is only plugged into AC power and controlled with explorestars. This chugging definitely is not adequate for sidereal tracking and from what I have seen in every other example of this