I’m considering buying your M68 diagonal as part of a project to widen my optical path. It is clear how to connect this to a refractor that has various MXX connections. I also have a legacy 6 in Celestron SC and am not sure how to connect the M68 diagonal to the 2 in screw. It would be obvious which of your adapters to use if I had eg a 9.25 Edge but the step down to the smaller one on the C6 is not clear. I do not want to use the 2in diagonal.
Hello, Several people have asked about using the M48 thread for use with Nikon F to M48 Mount adapters. You suggest using the EOS adaption which is no use at all. I would like to use the MPCC's M48 with an 8300 CCD system that has a 55mm Back Focus. How critical is the 55mm Back Focus? Would it still provide a sharp flat field for an 8300 sensor (22.5mm diagonal) at 57.5mm??
I'm not sure if I understand your problem correctly - in M48-configuration, the MPCC needs 2mm *more* of back focus. So, if your setup has got 55mm of backfocus, you are too close to the MPCC, at a distance of 52.5mm. By adding 1.5-2mm, you get into the specified distance. You can bridge this gap e.g. with our M48 spacer rings https://www.baader-planetarium.com/en/m48-fine-adjustment-rings-(03--05--1-mm)---aluminium.html in 0.3, 0.5 and 1mm thickness. But more than about .5mm does not work - and this is only possible if the thread of your camera adapter is not recessed. Depending on how well the threads fit to each other, it might be a good idea to secure the camera with the camera strap at the telescope, so that it can't fall down.
On the other hand, if you have a camera adapter with S52-ring-dovetail, you can try the Baader M48 Spacer Ring for MPCC III / Protective EOS T-Ring # 2458405 - often, you can remove the T-2-thread and access a ring-dovetail.
But as the Nikon-F-bajonet has got a diameter of only 44mm, which is smaller than the lens of the MPCC and smaller than the sensor of the 8300, you can also use T-2 instead of M48.
To make full use of the larger diameter of M48 - e.g. for an Off-Axis-Guider or if you have a large camera bajonet - take a look at the RCC I, Rowe Coma Corrector # 2956800 which provides a much larger back focus and is designed to allow for an off-axis-guider between camera and coma corrector.
Answer by: Baader Web Team (Admin) on Oct 23, 2019 9:32:00 AM
If you can use the eyepiece with barlow for visual use, there is usually also no problem with attaching a camera. This is mostly a problem with refractor spotting scopes, where you often can't focus to infinity with the Barlow lens.
Our company exists now for more than 50 years. In this time, more than 15.000 Baader Planetariums (the first patented product of our company) help all over the world to give students an understanding of astronomical correlations. In our own manufactory, more than 500 observatory domes have been produced and delivered turnkey-ready. Instruments and telescope accessories from "Baader" are known for their high qualities by many astronomers and universities. We consider it our duty and obligation, not only to sell telescopes, but an indivdually selected telescope system, that brings you a lifetime of joy.