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Geoff45
03-11-2009, 12:23 PM
Nice globular in Pavo, taken last new moon.
Telescope: WO 4" APO
Camera QSI 540 wsg
Exposure; 10 min each RGB, 22 min L (2 min subs)
renormalised
03-11-2009, 12:33 PM
Nice shot, Geoff, but watch your rig....looks like you have a bit of flexure or misalignment there. Nice to see the core resolved:D
multiweb
03-11-2009, 12:35 PM
As said previously a slight drift but it doesn't distract from the beautiful resolution and the overall shot. Very cool. :thumbsup:
Geoff45
03-11-2009, 12:47 PM
Yes I've noticed that. I'm currently upgrading so that all the camera attachment gear will have threaded connexions.
Geoff
lacad01
03-11-2009, 02:19 PM
That's a stunning image:thumbsup:
Dumb question but how can you work out there's flexure? I can only make out some elongated stars toward the left edge, is that one of the symptoms :shrug:
telecasterguru
03-11-2009, 02:48 PM
Fabulous resolution.

It looks like there could be a bit of sag in the focuser. How much does the QSI weigh?

Frank
Geoff45
03-11-2009, 03:25 PM
Yep. If there's some sag the camera sensor is tilted, so some parts are away from the focal plane. The elongation would be across the whole pic, but it is too small to notice on the right hand edge. It gradually gets worse as you move left and eventually becomes noticeable.
Geoff
Geoff45
03-11-2009, 03:32 PM
1.35 kg. I don't think it's the moonlite focuser as much as the extension tubes between focuser and camera. The basic problem is the OTA of the WO ZS110, which is too short. However I have taken steps to resolve the problem. Moonlite sell an extension flange (http://www.focuser.com/cgi-bin/dman.cgi?page=productdetail&plugin=dstore.cgi&product=CFL-FE25) which will effectively increase the OTA length. I'm also upgrading to threaded parts to connect the camera to the focuser.
Geoff
telecasterguru
03-11-2009, 03:41 PM
Geoff,

I did not know that the scope had a moonlight focuser, sorry. I have just fitted a moonlight to my ED127 as the original focuser was a little sloppy. The moonlight is absolutely awesome.

But as I said, I think the image is very good and resolved beautifully.

Frank
Hagar
03-11-2009, 08:52 PM
Nicely resolved. Looks like your setup and camera are working well together. Background could do with a little work but on the whole a nice image.
strongmanmike
04-11-2009, 12:11 AM
Yeh, the main globular ball look really good Geoff and lovely work revealing the core too :thumbsup:

Mike