What is the primary purpose of the BDS-SC Adapter S88i to M48i?
Its primary purpose is to convert the large S88 thread on a Baader Diamond Steeltrack SC (BDS-SC) focuser to the widely used M48 accessory thread. This allows you to securely attach imaging equipment like filter wheels, off-axis guiders, and cameras directly to the focuser drawtube.
Which focusers are compatible with the BDS-SC Adapter S88i to M48i?
This adapter is specifically designed for Baader Planetarium's Diamond Steeltrack focusers made for Schmidt-Cassegrain telescopes (BDS-SC). It matches the S88 thread found on these specific models.
Why should I use this BDS-SC adapter instead of a standard 2-inch visual back?
A threaded connection is mechanically superior to a push-fit adapter held by thumbscrews or a compression ring. The BDS-SC Adapter S88i to M48i prevents:
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Flexure: Sagging of heavy imaging equipment is eliminated.
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Tilt: The camera sensor remains perfectly perpendicular to the optical axis.
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Rotation: The imaging train cannot accidentally rotate or slip.
What kind of accessories can I attach using the BDS-SC Adapter S88i to M48i?
You can attach any astronomical accessory that has a male M48x0.75 thread. This includes most 2-inch filter wheels, off-axis guiders, camera rotators, and dedicated astronomy cameras that use an M48 nosepiece or adapter plate.
Will this BDS-SC adapter improve my images of the Orion Nebula (M42) taken with an SCT?
Yes. For deep-sky imaging of targets like the Orion Nebula (M42), maintaining a rigid optical train is critical for sharp stars across the field. By using the BDS-SC Adapter S88i to M48i to thread your camera and accessories to your BDS-SC focuser, you minimize flexure that can cause elongated stars, especially in the corners of your images during long exposures.
Is this adapter useful for planetary imaging of Jupiter with a C8 and a BDS-SC focuser?
Absolutely. While flexure is less of a concern with short planetary exposures, maintaining perfect collimation and alignment is key to capturing fine detail on Jupiter's cloud bands. A secure, threaded connection via the BDS-SC Adapter S88i to M48i ensures your camera and Barlow lens are held rigidly on-axis, preventing any optical tilt that could soften the image.