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Old 13-02-2018, 03:48 PM
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Merlin66 (Ken)
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Location: Junortoun Vic
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Baader Herschel wedge and ST102

Just an observation....
I wanted to use the ST102 (500mm fl) with the Baader wedge to test a CaK filter set-up with full disk coverage.
Sounds straightforward.....

Hmmm. No, not really. The backfocus requirements of the Baader wedge fitted with the Baader twist lock and the ASI camera was toooooo much for the available focuser inward travel.
Bumma!
The only solution I can think of, is to remove the Baader Twist lock and replace it with a M48>T2 adaptor then a T2> 1.25 adaptor. This should give at least another 20mm to play with.
We shall see......
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Old 14-02-2018, 08:10 AM
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Merlin66 (Ken)
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I measured the wrong thread!
The filter threaded section of the Baader Wedge/ twist lock is actual a M50 thread.
I've managed to cobble up a SCT to T thread adaptor which should do the job.

(If anyone needs a M48 (female) to T thread (male) adaptor for their SW flattener/ reducer - I can probably help!!!)

(Edit) Not as good as I thought - only saving around 12mm - may be enough???
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Last edited by Merlin66; 15-02-2018 at 07:32 AM.
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