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Old 16-06-2021, 10:24 AM
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rustigsmed (Russell)
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Question Strong focuser options

Hi all,

I have a asi6200mm and 7x2" filter wheel hanging off a moonlite focuser for my 130mm refractor - and i get focus slip very quickly, i have tightened the clutch very tight and applied the pressure/lock screw at the bottom very tight to no avail. I am not sure i can really tighten anything any further without fear of breaking it. worked fine when i was just using a filter draw and not a full filter wheel.

what are my options for upgrade? i know of feathertouch as a possible and atlas as probably the best option. are there others? is feathertouch really that much of an upgrade over moonlite?

Open to other suggestions.

thanks
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Old 16-06-2021, 10:27 AM
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Wilsil (Wilco)
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A rack and pinion would definitely work.
I am in the same situation, my image train from adapters to OAG plus CFW plus camera weighs 2.2 kg.
I am looking at the 2" Esatto from Primaluce
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Old 16-06-2021, 10:40 AM
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rustigsmed (Russell)
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Quote:
Originally Posted by Wilsil View Post
A rack and pinion would definitely work.
I am in the same situation, my image train from adapters to OAG plus CFW plus camera weighs 2.2 kg.
I am looking at the 2" Esatto from Primaluce
thanks wilco will check that out - haven't heard of that option before. oh yes i forgot to mention the OAG as well.
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Old 16-06-2021, 10:49 AM
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Camelopardalis (Dunk)
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I have a Baader Diamond Steeltrack on my SCT and it's up there with the other options. It's rack-and-pinion but with very smooth motion. Their motor option is prohibitively expensive, so you'd prolly want to roll your own solution on that front.

I'm sure it goes without saying that you should check the specs before clicking the "buy it now" button
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Old 16-06-2021, 05:48 PM
AstroApprentice (Jason)
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Another option very similar to the Esatto 3” is the soon to be released Pegasus prodigy https://pegasusastro.com/products/prodigy-microfocuser/



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thanks wilco will check that out - haven't heard of that option before. oh yes i forgot to mention the OAG as well.
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Old 16-06-2021, 06:43 PM
AdamJL
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Esatto or the Pegasus Astro. Both should be good
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Old 17-06-2021, 06:40 AM
gregmc (Greg)
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I have a MoonLite CFL 2.5 inch Large Format Crayford Refractor Focuser on my 120ED Skywatcher ESPRIT holding a QHY600M-PH with a QHY 7 x 50mm filterwheel and I have no issues.
The clutch wheel between the focuser and the motor needs to be tightened (by hand). That's intended to allow a manual focus if loose.
Perhaps talk to Moonlite about it as it sounds like some form of adjustment
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Old 17-06-2021, 08:43 AM
garymck (Gary)
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Quote:
Originally Posted by Camelopardalis View Post
I have a Baader Diamond Steeltrack on my SCT and it's up there with the other options. It's rack-and-pinion but with very smooth motion. Their motor option is prohibitively expensive, so you'd prolly want to roll your own solution on that front.

I'm sure it goes without saying that you should check the specs before clicking the "buy it now" button
+1 for the Diamond Steeltrack. Best focuser I've ever used, and unlike most is fully collimatable. Don't like Moonlights - have had several and every one of them developed grittiness when the anodizing broke down under the bearings.

FWIW
Gary
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Old 17-06-2021, 12:23 PM
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I was also looking at the Prodigy but after asking some questions and getting no answers, not so sure.
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Old 18-06-2021, 06:45 AM
AstroApprentice (Jason)
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Quality focuser options may decrease with the current issues at Starlight Instruments (FTF) & the purported change of direction at Moonlite:
https://www.cloudynights.com/topic/7...t-instruments/
Particularly for those who like the manual focus option…
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Old 18-06-2021, 04:18 PM
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rustigsmed (Russell)
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thanks for all the comments and suggestions everyone
i'll probably decide over the weekend on what I will go with.
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Old 18-06-2021, 08:28 PM
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Want the best? Try the rest, then get a FLI Atlas.
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Old 18-06-2021, 09:41 PM
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Logieberra (Logan)
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Quote:
Originally Posted by rustigsmed View Post
thanks for all the comments and suggestions everyone
i'll probably decide over the weekend on what I will go with.
I’d add Optec to the list if I was you. I have their TCF-S 3” and TCF LEO focuser and love them. They also have the Gemini w’ rotator. Give Don a call at BINTEL on Saturday - he sells Optec. Some history - the TCF has been their workhorse for over 20yrs: https://youtu.be/OwhifHeay-I They had the 1st temp compensation focuser patent which no doubt all those brands mentioned above have “bummed” off lol.
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Old 19-06-2021, 12:13 PM
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rustigsmed (Russell)
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Quote:
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Want the best? Try the rest, then get a FLI Atlas.
So I contacted fli and the atlas was discontinued at the end of 2020! They don’t make/sell focusers anymore!

Quote:
Originally Posted by Logieberra View Post
I’d add Optec to the list if I was you. I have their TCF-S 3” and TCF LEO focuser and love them. They also have the Gemini w’ rotator. Give Don a call at BINTEL on Saturday - he sells Optec. Some history - the TCF has been their workhorse for over 20yrs: https://youtu.be/OwhifHeay-I They had the 1st temp compensation focuser patent which no doubt all those brands mentioned above have “bummed” off lol.
Thanks for the additional option
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Old 19-06-2021, 02:06 PM
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So I contacted fli and the atlas was discontinued at the end of 2020! They don’t make/sell focusers anymore!
I am gob-smacked.

They could lift a bus with absolutely zero image shift.
I'll be treating mine like a silk-worm form here on...
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