Astromania Adjustable Guiding Scope Rings 90 mm Inside Diameter (Pair) - for Telescope Tube Diameter or Finders 34 to 85mm

Astromania adjustable tube rings for astrophotography.Set of 2 guide scope rings for finder-guide scopes between 34 mm and 85 mm tube diameter. The finder-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 finder-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: 90 mm Outer diameter: 105 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

• The inner diameter of the tube rings is 90 mm for Telescopes between 34 and 85 mm tube diameter can be mounted adjustable
• The adjustment crews have teflon inlays for avoiding unaesthetic scratches and pressure marks on the telescope while still ensuring reliable clamping
• Solid metal finder-guide scope rings for compact telescopes and finders with flat support surface and knurled metal screws
• 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
• Set: pair of two tube rings made of metal; the Astromania finder-guide scope rings are suitable for small and medium-sized guiding telescopes; ideal for astrophotography for mounting a finder-guide scope parallel to the main telescope