astroman001

It's edge rind - Google it. Caused by optical diffraction, hard to get rid of. A major issue imaging small bright planets. Peter

Mars now only 9.6" diameter. Thought I would still have a go, managed to get reasonable detail sowing Sinus Meridiani near centre and Hellas Basin at upper left. No sign of South Polar Cap. Also horrible edge rind on bright LH limb. Peter

It's edge rind, Google it. Quite normal I'm afraid. It's caused by diffraction and always affects the bright high contract limb of small bright planets. You can see it on my image just posted. Peter

Well captured. Such a great sight. Peter

Close up of terminator 20th December

DSLR mosaic of 3 images on a C14 Peter

Just about make out a belt on Jupiter. Single frame shot. DSLR on C14. Peter

Crescent Moon DSLR on ED80 at f/15 Peter

Now less than 0.5 degree apart. A couple of images from a DSLR on an ED80 at f/7.5 and f/15 Peter

ED80 at prime focus so 600mm f/7.5

Keith, If you mean the strange left edge curved features, this is edge rind, a well known phenomena. It's caused by diffraction patterns from the optics. It's a real pain and hard to avoid. Google it. Peter

Managed to get about 10 mins on Mars between the clouds. Only 12.9" diameter now. Some nice high altitude clouds on the terminator side. Elysium is very bright at lower left. Mare Cimmerium and Sinus Gomer prominent at centre. Peter

Getting closer now in ED80 field of view - DSLR 1/100sec at ISO 400 Peter

Hi Craig, I have read somewhere that the edge rind stays the same size, so therefore looks worse on smaller disks. Peter

A quicky Mars image in jittery seeing from between the clouds. It's getting much smaller now at only 13 arc secs diameter. Syrtis Major on show. Peter