This is a 63 mm male to 48 mm male adapter that adds 3.1 mm of length. The internal 48 mm female to 48 mm male connection adds 8.6 mm of length. The 63 male and 48 mm female threads are 5.5 mm long. The 48 mm male thread is 4 mm long.
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Well-made, hard to find adapter that I use between my rotator and 48mm spacers on my telescope.
was able to use this to thread a flattener on my scope rather than to use a compression ring.
My Stellarvue 80mm APO triplet has produced some very nice images for me using some of my small sensor cameras over the years. I recently used a larger sensor and noticed for the first time some star elongation in a couple of corners. I assumed camera tilt and asked Alex about it. He thought maybe it was a small tilt due to the compression ring on the drawtube so he suggested to try this male to female adapter in place of the drawtube compression ring. I also was using a second drawtube extension to provide a greater focus range. Well, I removed both compression rings and installed this simple adapter. Perfect!!!!!!! No more funny shaped stars in the corners and no need to hassle with a camera tilt adjuster.
Thanks once again, Alex! I simple solutions for a big problem. Those are the best!
Nicely machined adapter, but the flange thickness is 3 mm, not 4 mm as described. For anyone concerned with the length of the male threads, on my example, the M63 thread length is 5.5 mm and the M48 thread length is 4.0 mm. The OD of the flange is 68 mm.
And, as another reviewer noted, the user may want to apply some flat black paint to the interior surfaces.
Reply from Stellarvue: Chuck, thank you so much for pointing out that we had the added length wrong at 4 mm. Yikes! We have changed the website with the correct spacing. Let me know if you need a 1 mm spacer ring and I will gladly send it to you no charge. So happy you pointed out our error. Best Regards, Vic Maris
Received my adapter and it does screw into the focuser tube (m63) just like I was hoping it would and allows me to attach my filter wheel that's m48. The main issue after going out for the first time imaging with it, is that the internal side of the ring is pretty reflective and I have a huge ring reflecting on image after stacking. Can't use until I find a way to matte the ring so it's not so shiny
You can spray paint the part with ultra flat black spray paint and let it dry fully. This will remove any reflections you are experiencing. Please email us if you have any other questions!