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20190602 angle sight adapter (1)
© Fabien COUTANT

20190602 angle sight adapter (1)

DIY adapter for vintage right angle finder

First tried duck tape but it wasn't stable.

So I sawed a section of thick PVC tube which inside is a bit larger than 1", then
drilled 2 x 2 holes along, each pair separated by 120° approximately, and
finally threaded them.

Now one side is assembled to the angle finder, and I can assemble the other
side to:
* my polar finder for my EQ mount
* my 2 scope finders, 6x30 for the MAK and 9x50 for 130PDS.

PS: the angle finder is from Asahi Pentax and has proven of very good
optical quality; The effective FoV is about the same as the original finder I
assemble it on.




© Fabien COUTANT

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Photo Information for 20190602 angle sight adapter (1)


  • 82 mm
  • 1/40
  • f f/4.8
  • ISO 3200
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Hi Rotatux,

do you just mount that straight onto the focusing eyepiece of your finders or do you have to remove the eyepiece from the finder first?


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This kind of optics is designed to be mounted where an eye would go (initially, a reflex camera's finder). So it's straight onto the focusing eyepiece of my finders.

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