Bi-Ocular I2 viewer
Posted 13 March 2012 - 09:41 AM
Here's the photos of the PVS-7C in its telescope configuration:
^Original 1x objective lens and housing are seen in the background.
Posted 13 March 2012 - 09:49 AM
Posted 13 March 2012 - 03:09 PM
Posted 13 March 2012 - 08:01 PM
ETA: Bob, adapting the PVS-7C/A (M972/M973) didn't cost more than $10 in parts (ABS fitting for plumbing). Machining those ABS fittings shouldn't cost more than $50, I did that myself on a cheap hobby lathe. The easiest and cheapest way of adapting the 7C/A is to just make a split ring that fits over the objective assembly, see picture below:
The PVS-7B/D is the simplest to adapt since the adapter can be purchased. I think Aurora Tactical may have the adapter. The adapter replaces the objective assembly and is a simple thread off - thread on procedure. I'll post some pictures of the 7B/D with the c-mount adapter once that unit comes back from being loaned out. In the mean time here's a picture of the c-mount adapter:
The diopter range on the Collins is extremely limited, I can't bring it into focus without the aid of glasses. All the other systems I use have more than enough diopter range for use without correction. In my case, the Collins housing needs another 5-10mm of threads to be used without correction. In the absence of extra threads, the ocular will separate from the housing before focus is reached. The best unit for using as an image intensified eyepiece is the Micro monocular from Night Vision Depot
The Micro is available in a kit with everything but the image intensifier. You could simple pull the tube in your Collins and install it in the Micro. I have a video on YouTube of the installation process. The diopter range on the Micro is -2 to +6 and I've never had a problem bringing it to focus.
A true comparison of the Micro and Collins is best left to another thread but here are a few images of the units and their respective oculars:
Posted 14 March 2012 - 01:41 AM
Posted 14 March 2012 - 08:45 AM
Posted 14 March 2012 - 09:30 AM