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Old 24-08-2018, 01:09 PM
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darrellx (Darrell)
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Join Date: Dec 2007
Location: Kulgun, Queensland
Posts: 278
Esprit 150 Focuser

Hi All

I have an Esprit 150 with the standard focuser. The focuser seems to be “loose”.

When I put on a light load, all is good. By a light load I mean using either my DMK21, ATIK 314 or ASI 224, with or without a PowerMate.

When I start to load up the focuser with my ASI 1600 and Filter Wheel, the focuser will not stay in place and slowly winds out. Not a lot, but more than enough to totally go out of focus. There is not enough friction in there to hold the load in place.

The knobs do turn quite easily.

When I look under the focuser (Pic 2) I have checked each of the bolts and they seem quite firm. There is a small locking lever towards the front of the focuser. Is it normal for the focuser to slip out under load, and should I be using the locking lever once I am in focus? Seems to be a PITA way of doing it.

Also, on the right hand knob there is a “plastic sleeve”. (Pic 3) I cannot use that knob when the sleeve is on. But this knob turns very easy when the sleeve is removed. This is also a hugh PITA to hold the left hand knob once in focus and slip on the plastic sleeve.

Any suggestions?

I have also been in touch with MoonLite with a view to upgrade the focuser. This could turn out to be an expensive option, but will be another question.

Thanks
Darrell
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