I successfully moved my tube over from the PVS-14 to the Mod3-C housing.
This is doable but you need be mechanical inclined.
I recommend an adjustable O ring tool. I got one on ebay for about 15.00
Insert the gain control with care and wrap with teflon tape as AB nightvision says in their instruction.
This the only tricky part.
I also cut new 32 tpi ( C mount ) threads on the PVS14 lens on the lathe. This works but is not for the faint of heart.
Turn down the old PVS 14 thread area down to 0.992-3 inches. Hold on to lens by using afocal coupler in the chuck.
This will prevent crushing the optics.
Now on to observations. The PVS lens works just as well in the Mod3 ( no surprise ). The new threads fit flush to front of Mod3-C housing a 1x.
Next I tried prime focus in my friends 30 inch f 4.5 with a Paracor.
The view was dissappointing in that the edge correction was no better than afocal with a Russell 65mm.
In fact with and without the Paracor looked very similar. Need to figure this one out. Spacing ?
Next I tried a Rokinon 135mm camera lens. The is noted lens for astrophoto. It is known to give round stars at the edges of a 35mm frame.
The Mod3 C and this lens give a flat field with tight stars to the edge. It is a bit on the heavy side for hand held use but a great lens none the less.
More testing to come.
Edited by maxmir, 16 June 2021 - 10:28 AM.