Omegon SCT Adapter Bundle: 3.25 in to 2 in (C11 to C8)

Omegon SCT Adapter Kit: 82.5 mm to 50.8 mm (C11 to C8): your Crayford focus on a C8 or C11

Anyone who wants to bypass the mirror shift on a Schmidt-Cassegrain mounts an external Crayford focuser behind the SC thread. This bundle provides that connection for C11 and C8 telescopes: from the SC screw thread to the 78 mm ring clamp of the Omegon focusers.

This is how you perform the coarse focusing with the main mirror and the fine focusing with the Crayford, without distorting the image.

For both sizes in one bundle

The adapter bridge from 82.5 mm (C11) to 50.8 mm (C8) allows the same set to fit on both telescope sizes.

Monitoring Backfocus

The optical length is 34 mm. Behind a SC with a reducer, that is a measurement post; check the remaining working distance of your setup.

Featured accessories

For Schmidt-Cassegrain telescopes with C11 or C8 rear screws and focusers with 78 mm ring clamp, such as the Omegon Hybrid Crayford SC.

For whom yes and for whom no

• ✓ SC owners who install an external focus lens
• ✓ Whether you grow from C8 to C11 or vice versa: the bundle covers both
• ✓ Astrophotographers who want to exclude mirror shift
• ✗ Configurations with minimum backfocus: the beam is 34 mm wide
• ✗ Telescopes without SC-thread

Specifications

You can find more adapters for this brand on the Omegon brand page.