This is a t-mount Vivitar 800mm F/8 lens with adjustable Fstops from F/8 - F/32.
The objective lens is 100mm in diameter.
The lens is approximately 32" long and weights about 7 lbs without a camera attached.
Can be used with any camera that has a t-mount (t-ring) adapter.
It has a standard 1/4" tripod mount with a rotate-able collar.
The lens dissasemble for storage and comes with storage case.
There is a dust cap for the objective lens and the t-mount end.
The coatings and lens are in good condition except for a few very fine cleaning marks.
I will sell it for $195.00 shipped in Continental USA.
Payment can be Paypal or money order.