What is the purpose of the Baader RT-Adapter for 4.2" Explore Scientific scopes?
This adapter is a custom-machined ring that allows you to remove the stock focuser from an Explore Scientific refractor with a 4.2" outer diameter tube and replace it with a high-precision Baader Diamond Steeltrack focuser. It provides the necessary mechanical connection for the upgrade.
Will this Baader RT-Adapter fit any Explore Scientific refractor?
No. It fits Explore Scientific refractors with a 4.2" outer tube diameter, and other telescopes with an inner tube diameter of 116.8 mm. You must measure your telescope's tube to ensure compatibility before ordering.
Why would I upgrade the focuser on my 4.2" Explore Scientific triplet refractor with this adapter?
Upgrading to a Baader Diamond Steeltrack focuser provides superior load capacity for heavy imaging cameras, eliminates image shift during focusing, and offers finer, more precise control. This adapter is essential for imagers who find their stock focuser flexing or slipping under the weight of their equipment.
Is installing the Baader RT-Adapter a complex process?
After the stock focuser is removed, the adapter connects to the telescope on the lens side (Baader lists a 4.2" thread, 106.7 mm, and an expanding adapter design), and the BDS-RT focuser is clamped into the adapter's S88 dovetail. While mechanically straightforward, it's a process that should be done carefully to avoid damaging threads or optical components.
Can I use this adapter to mount other focusers besides the Baader Diamond Steeltrack?
This adapter is specifically designed to present the correct threads and mounting face for Baader's Diamond Steeltrack line of focusers. It is not guaranteed to be compatible with focusers from other manufacturers.
If I'm imaging faint nebulae like the Veil Nebula (NGC 6960) with a heavy camera, will this adapter prevent focuser sag on my 4.2" refractor?
Yes, that is its primary purpose. By enabling the installation of a robust Diamond Steeltrack focuser, this adapter helps create a rigid imaging train. This rigidity is critical for long exposures on targets like the Veil Nebula (NGC 6960), as it prevents the focuser from sagging under the weight of your camera and causing tilted stars.
