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SV503 80ed and Uranus-C Back Focus Questions

Astrophotography Refractor
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#1 PJB9166

PJB9166

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Posted 29 September 2023 - 02:51 AM

Greeting all. I think this will be the first post I'm making on this forum. I've had the account forever though. I'm currently using an SVBony SV503 80ed with it's dedicated 0.8x field flattener\reducer. My camera has been a Canon 1300D. Back focus was not an issue. Simply screwed the T rind right to the reducer. I'm looking at the Uranus-C from Player One. I'm thinking it's not going to be that easy. I don't know where I found it. But SVBony has a diagram with thier version of the 533. It shows that from the threads of the reducer to the camera's needs 55mm (measurement endnig at the threads of the extension tube). I don't know much about the Uranus-C. If anyone has experience with my setup and has been through this can you please share some wisdom? Thank You and Clear Skies.



#2 Tapio

Tapio

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Posted 29 September 2023 - 04:46 AM

There's always (or nearly always) a diagram of dimensions in camera web pages.
It's there too in here (bottom of page).
https://player-one-a...-camera-imx585/

In this case it's 12.5mm and it's a m42*0.75 thread or the so called T2. So you need 55-12.5mm T2 extension.
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