Collimation of the secondary mirror after replacing the spider on Newton.
Single frame photo of Deneb, made after the rework on the Facebook page https://www.facebook.com/photo?fbid=2...
For my torn years ...
https://send.monobank.ua/jar/21myYzoASF
Mono Bank card 4441 1144 4419 8608
Bitcoin crypto - 1GeMKbf4H24oXA7uUw92CPjcDD8jxxLJPT
My astro photos will be here https://deepskyhosting.com/justvolkov or
https://telescopius.com/profile/kamer... or https://www.astrobin.com/users/justvo...
My Facebook page https://www.facebook.com/profile.php?...