Mirror shift/flop on SCT, What you say?

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hhzhang
Posts: 340
Joined: Sun May 10, 2020 4:11 pm
Favourite scope: 115mm APO

Mirror shift/flop on SCT, What you say?

Post by hhzhang »

Am considering a purchase of SCT either conventional or EdgeHD/ACF. It is an attractive option -- for the same aperture, the weight is lower (friendly to my EQ mount) and the cost is much more friendly, and the provision of focal flatterner+ reducers by original manufacturer or Starizona alike also adds much to the versatility.

But I am quite worried about the mirror shift and flop problems. How do you go around it?
akdwivedi
Posts: 23
Joined: Sat May 06, 2017 1:01 am
Favourite scope: celestron

Re: Mirror shift/flop on SCT, What you say?

Post by akdwivedi »

will adding an external focusser like crayford focusser behind the optical path work for SCT? that will reduce the need to use the traditional focusser which moves the mirror.

something like this - https://agenaastro.com/articles/guides/ ... r-sct.html
hhzhang
Posts: 340
Joined: Sun May 10, 2020 4:11 pm
Favourite scope: 115mm APO

Re: Mirror shift/flop on SCT, What you say?

Post by hhzhang »

akdwivedi wrote: Mon May 03, 2021 5:44 pm will adding an external focusser like crayford focusser behind the optical path work for SCT? that will reduce the need to use the traditional focusser which moves the mirror.

something like this - https://agenaastro.com/articles/guides/ ... r-sct.html
A very comprehensive article. Thanks!

It is just that the SCT has been no stock for a long time.
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