Lacerta Octo focuser with M74x1 thread for refractors

The Octo eyepiece focuser series is being expanded further!

This rotatable 2.7 inch focuser with 95mm adjustment range and over 65mm free opening is designed for large refractors.

All 8 ball bearings can be adjusted independently of each other to ensure optimal running of the extension tube.

The original model BTrL27 has been further developed in the following points: - The extension is guided on 8 ball bearings (the previous model only had 4 ball bearings) - All 8 ball bearings can be adjusted independently of each other (the previous model had no ball bearing adjustment option) - The M74x1 thread at the front has a rotation unit (the previous model had no rotation option) - This allows you to rotate your zenith mirror without unclamping it, without having to rotate the entire OAZ - Increased wall thickness (now 6mm, which is 1mm thicker than the previous model) - MFOC adaptation prepared on BOTH sides (the previous model only had it on the microfocus side) The technical data: Eyepiece-side connections: - Rotatable M74x1 external thread - Reduction to 2 inch eyepiece socket, - Further reduction to 1.25 inch eyepiece socket - ​​Weight: 1808 g Telescope side

Connections: - from the inside 90mm dovetail mount (eyepiece extension body including finder holder is rotatable) - from the outside 99mm outer diameter (eyepiece extension body including finder holder does NOT rotate, but the M74x1 thread remains rotatable.

Minimum length: up to the rotating M74x1 thread: 114mm up to the 2-inch clamp: 138mm Maximum length: up to the rotating M74x1 thread: 209mm up to the 2-inch clamp: 233mm Stroke / adjustment range: 95mm Total weight with all reductions: 1789 grams Free opening at the narrowest point of the light trap: 65.3mm (2.57 inches) Free opening at the widest point of the eyepiece extension: 68.5mm (2.7 inches) Wall thickness of the extension tube: 6mm