Re: Bad images _Bouncing stars
As I offered I had some weirdness with my setup. After much fidgeting and greasing the gears and a new PEC curve, I can go 382" (the worm period) and get round stars near zenith unguided. I could go 300", but that wasn't a complete worm cycle. This suggests strongly that the weirdness was not the mount. A good place to start to see what your mount can do.
Mike J. Shade
Mike J. Shade Photography:
In War: Resolution
In Defeat: Defiance
In Victory: Magnanimity
In Peace: Goodwill
Sir Winston Churchill
Already, in the gathering dusk, a few of the stars are turning on their lights.
Vega, the brightest one, is now dropping towards the west. Can it be half
a year since I watched her April rising in the east? Low in the southwest
Antares blinks a sad farwell to fall...
Leslie Peltier, Starlight Nights
International Dark Sky Association: www.darksky.org
firstname.lastname@example.org [mailto:email@example.com] On Behalf Of John
Thompson via groups.io
I apologize. I should have provided more information in my
"bouncing stars"post. It's an AP 1600 mount (no Encoders) with a
TEC140 F/7 scope with a FLI Atlas focuser. It's running Maxim for the main
camera, SBIG STF-8300 and PHD for the guide camera, a SBIG ST-i. I am using
APCC Pro with SkyX for the planetary program. The focus program is FocusMax.
The session runs auto using CCDAutoPilot5. I am shooting LRGB 10 images each
filter @ 600 sec using a 5 pixel dither between images. PHD is running RA and
DEC in Hyperstasis with a 60 aggression setting with 3 sec exposures with
dithering. Actually the guiding looks very good with very few corrections and a
low RMS. I don;t believe the guide star is lost at any time but dithering might
be an issue. I will look at the guide logs for any clues. The only time I see
something "funny" is during the dithers. But the guiding stops during
the dithers and then re-aguires the guide star.