this post was submitted on 02 Nov 2024
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Astrophotography

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Would this even work? (sh.itjust.works)
submitted 3 weeks ago* (last edited 2 weeks ago) by einfach_orangensaft to c/[email protected]
 

Or would the tolerances needed in the hinged mirror make the whole thing unusable?

I was looking at modern "smart telescopes" recently and noticed some are sideways and wondered if that would be possible for a normal hobby Newtonian telescope.

Possible upsides:

  • no tripod needed for use
  • mirror is light so smaller motors can be used for movement

Possible downsides:

  • maybe mirror flatness?

EDIT/UPDATE: so i tryed it with a 75mm first surface mirror, it kinda worked, at least better than a normal mirror, but i wasnt able to get it as sharply focused as i like. I suspect the mirrior i use has micro ripples because its just 2mm thick and doesent look like its seen a polishen process....guess thats how far a budget of 25bucks gets ya

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[–] einfach_orangensaft 2 points 3 weeks ago (1 children)

entrance pupil isn’t well defined

oh right, i didnt thought about that, maybe i could add some sort of shroud to the light inlet

[–] [email protected] 2 points 3 weeks ago (1 children)

To be effective, it would have to be like a telescope tube, which is what you're trying to eliminate in the first place.

[–] einfach_orangensaft 1 points 3 weeks ago (1 children)

thats what i was thinking :/

Tubeless telescopes exist tho, i saw some big diy newtonians that did not have any

[–] [email protected] 4 points 3 weeks ago

There are good reasons to not use a tube: tubes limit airflow over the mirror, increasing "mirror seeing", and they add weight. But then you need an alternative way of rejecting off-axis light. One way of doing that is a dome or similar enclosure.