Astromania adjustable tube rings for astrophotography.Set of 2 guide scope rings for guide scopes between 48 mm and 100 mm tube diameter. The guide scope rings from Astromania Optics allow a reliable and above all stable adaption of telescopes parallel to the main instrument. Most common use is astrophotography. With the knurled thumb screws, the guide scope is adjustable and you can centre a sufficiently bright star in the eyepiece or the the autoguider. And the tube rings are suitable for bigger finder scopes, too. The adaption of the tube rings to the telescope. The rings have two female M6 threads in a distance of 38 mm. Therefore, the rings fit directly to the TSFDA or TSPKM dovetail clamps. You can also attach the rings to flat support surfaces like dovetail bars, and get a short adaption to your telescope. Technical Details: Inner diameter: 102 mm Outer diameter: 117 mm Support surface: Flat area with 45 mm diameter and 4x M6 threads (female) Distance of threads: Inner pair 20 mm - outer pair 38 mm

Set: pair of two tube rings made of metal.The Astromania guide scope rings are suitable for small and medium-sized guiding telescopes.Ideal for astrophotography for mounting a guide scope parallel to the main telescope. At the base, the rings have a flat surface with four female M6 threads (Inner pair 20 mm - outer pair 38 mm) for easy adaption to dovetail bars or dovetail clamps. Big screws with maximum grip allow easy use - even with gloves. Solid metal guide scope rings for compact telescopes and finders with flat support surface and knurled metal screws. The adjustment crews have teflon inlays for avoiding unaesthetic scratches and pressure marks on the telescope while still ensuring reliable clamping. The inner diameter of the tube rings is 102 mm for Telescopes between 48 to 100mm tube diameter can be mounted adjustable.

Item Weight: 11 Ounces. Finderscope: Reflex. Focus Type: Manual Focus. Objective Lens Diameter: 100 Millimeters. Brand: Astromania. Manufacturer: Astromania. Date First Available: October 31, 2016. Is Discontinued By Manufacturer: No. Best Sellers Rank: #59 in Telescope Finder Scopes. Customer Reviews: 5.0 out of 5 stars 3 ratings 5.0 out of 5 stars. Item model number: SKU_AM_AGSR102C. : B07CMQX9C6. Item Weight: 11 ounces. Product Dimensions: 5.9 x 5.9 x 1.57 inches.