Explore Scientific 52 degrees 40mm Eyepiece 2" Torch and each ring has three

and each ring has three adjustment points

50 on eBay (look for packs of 10 or 20 batteries)

The latest from William Optics is the MiniCat 51 APO WIFD

75) thread on the telescope side

25" cylinder type guiding cameras

Explore Scientific 52 degrees 40mm Eyepiece 2" Torch and each ring has threeThe longest focal length in the 52 Series with the longest eye relief, the 40mm is also the only 2. 0 inch O. D. eyepiece in this series. Explore Scientific now has three 40mm eyepieces in its collection, the other two are the 40mm 62 Series, and the 40mm 68 Series. At this focal length, this eyepiece is generally reserved for deep sky observers who challenge themselves to observe near the faintest observable limit of their telescopes. The huge true