Quote:
Originally Posted by John Hothersall
Those are interesting results Dennis, mistakes get made all the time in the dark, forgetting to remove dew caps etc.
Bigger scopes have smaller airy discs anyway but with your size of scope you may need to experiment on close doubles with/without mask to be certain you are getting some advantage - Antares has a 5th mag blue companion 2.7 arc sec apart and would be very difficult to get a clean split in your scope (I can just manage it with 14" aperture - good collimation essential).
The effect seems to reduce highlights by spreading them out more. I think the excellent detail was down to the seeing on Saturday night not the mask possibly?
After rotating the images 10 degrees CW I used ImagesPlus Local-Line Enhancement and Suppression which reduced vertical lines really well with horizontal width of 5 vert 37.
Very interesting post.
John.
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Hi John
I’ve split Antares with a Vixen 4” refractor and stacked Barlow’s with a Meade LPI several years ago, under almost perfect conditions.
Here is a split from Sun 15th May 2016 with the ASI224MC and Mewlon 180 with TeleVue x2.0 PowerMate under less favourable conditions. I also managed a cleaner split with the B&W ASI120MM back in 2013 using the Mewlon 180.
Agree with your comment re good seeing for the above "accidental" lunar images.
Cheers
Dennis
EDIT:
Just found the old Vixen 4” results from the early 2000’s. I still have that Vixen.