AweSky is your free astrophotography gallery Miscellaneous > Equipment > Collimation Mask
Thank you for supporting this wiki project
Maybe it is the first time you see a mask like this one. It is the first time for me at least. If you have a big Schmidt-Cassegrain telescope and had problems trying to collimate it due to atmospheric turbulence, you should try this mask.

Samir Kharusi employs it to reduce the effective aperture of the optical tube and soften turbulence. More details in his webpage; below you'll find the link.

 
 
2015-11-13 14:13:41       
Definitely pimp-alicious and trashy, and will be whloly embarrassing as Boise State throws a beat down on the Dawgs.And Oregon has the hands down most hideous unis in College football, so at least you got that going for you, UGA, or should that be UGA-lee, now
 
2015-10-18 17:53:35       
Fantastic Website Print extra, the correct way all Should cntariely convey. Really concerning, it looks once you actually depended inside the training video with regard to manufacturing a personal component. One truly obviously uncover exactly what youre showing concern
This is AweSky astrophoto free gallery
Homepage | Top 10 | Last additions | Upload | C9.25
[Website created in the IYA-2009: International Year of Astronomy]