Is the gap between the etalon and the objective critical.
Alan
Etalon to objective gap
- marktownley
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Re: Etalon to objective gap
Don't think so. I've never really payed much attention to it when mounting external etalons on my scopes, and have never noticed any adverse results.
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Re: Etalon to objective gap
Thanks Mark I was worried that I had a friend make an adapter to mount a SM90 to a SkyWatcher scope not giving any thought if there is a set distance.
Al
Al
Alan
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Re: Etalon to objective gap
No, there's no critical spacing required with an external etalon.
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Re: Etalon to objective gap
Hi Alan
exact what Mark and Ken wrote
exact what Mark and Ken wrote
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