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What is this?

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dawson's picture
Last seen: 7 hours 38 sec ago
Joined: 15/03/2014 - 11:08
What is this?

Someone on an amateur astronomy Facebook group has asked what this is, apparently it came with a second hand telescope. Does anyone have any ideas what it could have been used for?



djswan2002's picture
Last seen: 4 days 9 hours ago
Joined: 20/04/2017 - 19:58
Telescope add-on

I would guess this is an attachment to facilitate afocal photography? The two eyepiece clamps are placed differently with respect to the camera screw to allow different set-ups.