Ever wonder where a Bahtinov mask came from, why it's so popular, and why anyone can 3D print it? Find out! This is a reupload with better audio.

By the way, check out my web app and sharpening tool!

Links from the video: https://astronomy.ru/forum/index.php/...
https://www.cloudynights.com/topic/17...

Other useful information:
https://www.cloudynights.com/articles...

@astro_channel's interview is here:    • Интервью с Павлом Бахтиновым || An in...  

#astronomy #astrophotography #photography #diffraction #telescopes #hubble #focus #telescope nqFI29h8W0Fp9UkKOJry

For those interested, here is the gear I use (or equivalent; Orion has discontinued some of their products, so the equivalent skywatcher products are listed). Most of the links are Amazon Affiliate links. Thanks!
Skywatcher HEQ5 Mount https://amzn.to/3NVrVQi
Skywatcher 80mm F7.5 Doublet https://amzn.to/47mbfZi
ZWO EFW mini filter wheel https://amzn.to/48OxhoN
Optolong LRGB Filter Set (1.25") https://amzn.to/47r23Tw
Orion 0.8x Reducer https://amzn.to/47s64a4
USB RJ45 Cable for Controlling Mount https://amzn.to/4aPlIzu
Raspberry Pi to control mount https://amzn.to/48mTBWH
R Pi case with touch screen https://amzn.to/3HvdNKl
ZWO Autofocuser https://amzn.to/3Skg0hX