Ok, Let's not get too excited about this, there was no need to shout or warn people, these are simple focal reducers, not explosives.
It's a focal reducer in two different mounting options. The one on the left has the 2" nose piece, the other has an SCT threaded ring. There is nothing particularly special about them but they are a clever packaging of multiple off the shelf focal reducers and adapters (it's a compound optical design with two reducers stacked together) with a little custom work.
http://www.astro-vid...l-reducers.html This website is interesting for historical purposes but I would highly recommend that you not attempt to do any business with the folks behind it. If you are curious just search on Astro-video systems in the EAA forum (get yourself a coffee and get comfortable before reading, there's been lots of discussion about the company and individual behind it).
There's nothing special about the LN300 camera originally used with this reducer, it's just a nice sensitive security camera with CS-mount spacing on the front end. You could use ANY 1/3" sensor CS-mount camera with these focal reducers (there are lots of analog video cameras with that sensor and mounting). That also means the popular Revolution series, Mallincam Micro, and even many of the popular AS130 and IMX 224 sensor based CMOS USB cameras. Just be a bit careful about the camera's specification, for example some of the IMX224 cameras in many of the ToupTek versions (from Mallincam, and RisingCam) are C-mount, not CS-mount and this means the sensors are 5mm farther away which will likely show some optical problems when used at f1.8. If I had one of these reducers and some of these more popular 1/3" sensor cameras with the C-mount spacing (which I do) I would look into removing that 5mm from the focal reducer's body.
Edited by mclewis1, 05 November 2018 - 11:34 AM.