I have a similar image train on my C8 SCT. Starizona focal reducer, Celestron OAG, ASI174mm mini, ZWO filter drawer and ASI071MC Pro. I use an Antlia Quad Band filter and sometimes just an Optolong IR/UV filter. I agree it's sometimes hard to find a guide star, you just have to rotate the OAG sometimes. I don't have your mount and I find short guide exposures help guiding for me (1" or less) which sometimes cause lost star alarms in guiding. I found using a parfocal ring around my guide camera allows me to adjust focus easier and to keep the guide camera centered when tightening the two set screws . I wish Celestron designed it with compression rings. I found some videos from James Lamb youTube helps in planning for locating guide stars around a target. What kind of guiding RMS are you getting from the ASIAir on your C8 with OAG now? Thanks
Hi, the weather has not helped at all since setting up the new gear with wind just about every night and a lot of cloud. So when it’s windy there is no point in comparing results. I did have one clear still night a couple of days ago and the results were pretty pleasing. With the 174mm guide scope I could regularly get sub .5 RA and sub .25 Dec but as the OAG is at 1280mm = 7X the low 1s on each is actually better, the results look a lot better and with dithering on the old set up it could take
@@KJRitch I had a still night last night, patchy cloud and a very bright and high moon. So got about an hour of guiding in and the result was about .7 RA .3 Dec and total between .7 best and 1.0 worst over that time and bounced back from a dither in a few seconds. With the bright moon it was still not ideal guiding conditions. How does that compare with your system?
I have a similar image train on my C8 SCT. Starizona focal reducer, Celestron OAG, ASI174mm mini, ZWO filter drawer and ASI071MC Pro. I use an Antlia Quad Band filter and sometimes just an Optolong IR/UV filter. I agree it's sometimes hard to find a guide star, you just have to rotate the OAG sometimes. I don't have your mount and I find short guide exposures help guiding for me (1" or less) which sometimes cause lost star alarms in guiding. I found using a parfocal ring around my guide camera allows me to adjust focus easier and to keep the guide camera centered when tightening the two set screws . I wish Celestron designed it with compression rings. I found some videos from James Lamb youTube helps in planning for locating guide stars around a target. What kind of guiding RMS are you getting from the ASIAir on your C8 with OAG now? Thanks
Hi, the weather has not helped at all since setting up the new gear with wind just about every night and a lot of cloud. So when it’s windy there is no point in comparing results. I did have one clear still night a couple of days ago and the results were pretty pleasing. With the 174mm guide scope I could regularly get sub .5 RA and sub .25 Dec but as the OAG is at 1280mm = 7X the low 1s on each is actually better, the results look a lot better and with dithering on the old set up it could take
@@KJRitch I had a still night last night, patchy cloud and a very bright and high moon. So got about an hour of guiding in and the result was about .7 RA .3 Dec and total between .7 best and 1.0 worst over that time and bounced back from a dither in a few seconds. With the bright moon it was still not ideal guiding conditions. How does that compare with your system?