Quote:
Originally Posted by AstroJunk
Here's my aperture mask!
My local seeing is truly rubbish most of the time and it kills definition across a large mirror surface. The aperture mask certainly helps sharpen up the image when those stars are twinkling and reduces glare of that scattered light. On the very odd occasion though, the seeing firms up and a 20" view of the planets is truly stunning  |
Looks great, Jonathan... I also particularly like that you’ve labeled the mask the way you have.
Can I ask, was there a specific reason or calculation that had you make the mask to 6”? That’s a lot of stopping down, which makes sense if the seeing is poor or the object too bright, but is there a reason you didn’t choose, say, 8” or even 10”? 8 inches seems to be a pretty well performing aperture for a lot of scopes under most conditions.