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New wo gt71 focus issues

ninjageezer

By ninjageezer
in Getting Started With Imaging

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david_taurus83
david_taurus83

It's correct. If you undo the knurled ring and wind it back to the front section you would see that the rear section is on around 9mm on the scale.

StevieDvd
StevieDvd

Looking at the data for the reducer and your scope as you have it setup then my calculation for the adjuster setting is about 8.7mm Reducer Back focus 64.1

Laurin Dave
Laurin Dave

As @scotty38 says to start with you need to adjust the flattener to 9.1mm.  I found with mine that in-order to fine tune the flattener spacing (from 9.1) I needed to remove the rotator to get some ext

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ninjageezer

ninjageezer

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11 hours ago, Laurin Dave said:

Indeed I do..  focuser could be better though in terms of flex 

Can I ask what camera you use is it APS-C size or full frame. and are you happy with the edge to edge stars.

I'm beginning to think I have an issue with mine, got anther couple of hours in last night and got nowhere. I had the Z73 before this same camera no issues at all.

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Laurin Dave

Laurin Dave

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21 minutes ago, ninjageezer said:

Can I ask what camera you use is it APS-C size or full frame. and are you happy with the edge to edge stars.

I'm beginning to think I have an issue with mine, got anther couple of hours in last night and got nowhere. I had the Z73 before this same camera no issues at all.

Its good at APSC size and pretty good at full frame when pointing high in the sky (wobbly focuser).   The original one purchased in 2020 had very poor corner stars even with an ASI1600 and was diagnosed as suffering from the objective pointing off centre with respect to the reducer. It was replaced by FLO.   

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