15 replies to this topic

[Tulloch]

I had the Meade 12" SCT out again, hoping for a more pleasant experience than last time. After reseting and training the mount and replacing the straight through finder with my RACI, it was a little easier to find and capture the planet, but the "beep and creep" issue (when the mount moves in the opposite direction after releasing the direction buttons) was still a problem. Maybe a firmware update might help fix this.

 

Anyway, Tethys was transiting Saturn and I was able to capture the end of the passage across the planet with the ASI224MC, and finished with a wide angle shot using my ASI533MC Pro capturing 6 moons. 

 

Here is the Tethys transit shown as an animation, with the moon enhanced a little and its shadow just visible below the rings' shadow.

 

 

Here's the wide angle with (L-R) Iapetus, Rhea, Dione, Enceladus, Titan and Tethys (click to show full size).

 

 

Images captured using a Meade LX-90 12" SCT, ZWO ADC, Televue 2.5x Powermate, ASI224MC and ASI533MC Pro cameras.

 

Andrew

[JMP]

Very nice!

[Dangerdan]

Darn good image of Saturn - thanks for sharing.

[RedLionNJ]

I don't recall my LX200 mount ever doing that "opposite creep" thing when I had my 12" on it. What kind of mount is it on?

 

Any possibility it's just the optics resettling in a slightly different position?

[marvyyk]

Great images!

[Tulloch]

I don't recall my LX200 mount ever doing that "opposite creep" thing when I had my 12" on it. What kind of mount is it on?

 

Any possibility it's just the optics resettling in a slightly different position?

It's on an LX-90, I'm speaking to an expert on the LX-200/90/etc series, he was the one who mentioned it.

[Ittaku]

Beautiful result. Dialled in in no time. Perhaps add backlash compensation.

[Tulloch]

Beautiful result. Dialled in in no time. Perhaps add backlash compensation.

Thanks, but there's no such setting on the LX-90. The closest thing is called Az Percent and Alt Percent, and the recommendation is to set those values to zero. I did this before last night's session, and the scope was better, but still had the same problem.

[dcaponeii]

Thanks, but there's no such setting on the LX-90. The closest thing is called Az Percent and Alt Percent, and the recommendation is to set those values to zero. I did this before last night's session, and the scope was better, but still had the same problem.

Is that the 12" with f/10 optics??  I'm excited to see that you converted to the dark side (dark blue that is).  I guess I missed your acquisition.  Apologies for my oversight.
 

[KMH]

Terrific result - the shadow is very clear to see!

 

Kevin

[Tulloch]

Thanks all for the comments and likes

 

Is that the 12" with f/10 optics??  I'm excited to see that you converted to the dark side (dark blue that is).  I guess I missed your acquisition.  Apologies for my oversight.

Yeah, I pulled the trigger last week on a used LX-90 12" f/10, first light was here.

 

I'm still coming to grips with the different scope, the biggest problem is the scope not staying where it's put but I'm hopeful that I might get it fixed. If not, I can always de-fork it and put it on the CGEM eq mount ...

[Space Cowboy]

Terrific images again with the bigger scope!  As long as your mount does'nt develop a tic like my Dob you'll be ok

[BKMaynard]

Never heard of a beep and creep before. Usually, the issue is the mount moving in the wrong direction slightly before it moves in the intended direction, mostly in declination. In this case the worm/gear mesh is too tight. Maybe the backlash setting is too high. At any rate, definitely some good optics.

[Kiwi Paul]

Very nice images Andrew with very good resolution.

(The rings look rather dark).

Cheers Paul

[sfugardi]

Andrew, excellent animation and image! Details are impressive. The transit is very well resolved. Congrats on the new scope and this set! Thanks for posting

 

Regards,

Steve

[Tulloch]

I don't recall my LX200 mount ever doing that "opposite creep" thing when I had my 12" on it. What kind of mount is it on?

 

Any possibility it's just the optics resettling in a slightly different position?

It's described in a bit more detail here.

http://www.weasner.c...g-percents.html