Backfocus oag-8300

Discussion in 'General' started by Eric U, Jul 8, 2016.

  1. Eric U

    Eric U Standard User

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    Jun 28, 2016
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    I want to use an off axis guider with my f3.6 Newtonian. I will be using a Televue Paracorr 2 which has a backfocus of 57 mm. Can anyone tell me how the oag-8300 works as far as backfocus. That is, with the relay system, is the backfocus of the oag-8300 going to the guide camera identical to the backfocus going to my st-8300 color camera.

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  2. Eric U

    Eric U Standard User

    Joined:
    Jun 28, 2016
    Messages:
    2
    Never mind. It looks to me as though the backfocus of the OAG, plus spacer (or filterwheel), plus camera backfocus is greater than 57 mm.

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