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Old 14-01-2019, 03:09 PM
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Question C11 main mirror travel

Anybody knows length of C11 mirror travel? Or, how much the mirror moves for one turn of the focus knob?
(I can have a look myself, but maybe this info is already there).


Thanks in advance!
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Old 14-01-2019, 03:16 PM
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Marc, thank you!
That is quite a lot...



I am thinking of modifying the focus mechanism, I do not like the current asimetric, off-axis side-pushing design (and associated mirror flop and tilt)
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Old 14-01-2019, 03:39 PM
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Quote:
Originally Posted by bojan View Post
Marc, thank you!
That is quite a lot...



I am thinking of modifying the focus mechanism, I do not like the current asimetric, off-axis side-pushing design (and associated mirror flop and tilt)
Sorry I deleted the post quickly after realising you asked for one knob turn only. 80mm is the total travel distance before the mirror comes off the baffle tube. I don't know what one turn is in travel. I changed the focuser to a micro-focuser as well on mine.
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Old 14-01-2019, 03:44 PM
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Total travel is around 30 turns of the focus knob.
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Old 14-01-2019, 03:48 PM
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Thank you guys..

Yes, I meant total travel (or per knob turn)
So that means total travel is done with 30 turns, or 80/30 = 2.7mm /turn?
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Old 14-01-2019, 03:56 PM
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Bojan,
I don't think the thread is that coarse....Marc has given a total baffle length, not the travel distance of the mirror..
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Old 14-01-2019, 04:32 PM
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Quote:
Originally Posted by Merlin66 View Post
Bojan,
I don't think the thread is that coarse....Marc has given a total baffle length, not the travel distance of the mirror..
Exactly my thinking...
Thread is probably 1.25mm... or 0.75.
I will have a look...
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