Thanks everyone for your positive comments.
davidpretorius, I'll give Mitchell resampling a try and back off the wavelets (I actually kind of understand what wavelets are!). I thought the white ring around the planet might have been me overprocessing an image taken with poor seeing.
Mike, I'll take you up on your offer. I'll try and zip up my images tonight at home and send them to you (though it looks like clear skies tonight - I'll try to get them to you this weekend
) No pressure though, I'm sure you have a few other things you need to be doing! I have to thank you for getting me this far as I followed your Registax instructions - I didn't think there was that much detail in the images I took. It was great comparing my image to Mars Previewer II and seeing the features that were supposed to be there!
What resolution am I using with the LPI? If you're asking if I'm using 2x2 binning or some other strange digital imaging technique, then the answer is 'I don't think so'! I'm just capturing all images from the Autostar Envisage application - I'm not letting Envisage do any combining or any other processing (though maybe I'd better have a closer look at the settings)
As far as image scale goes I am using a 10" LX200 with a 2.5 m FL with a 2X barlow - this should give me a 5m FL. A 20 arcsec object (Mars) imaged by a 5m FL system should give an image size of 0.5mm at the focal plane. An image 0.5 mm wide on the LPI with 8 micron pixels should cover about 63 pixels. In my image I measured about 71 pixels so with the inevitable error introduced by my white ring I think I'm in the ball park. Does this make sense - I don't have too much experience as far as astrophotography goes - I could have made a glaring error!
)
![[1ponders]'s Avatar](../vbiis/customavatars/avatar45_9.gif){kind=avatar}
