If that Vivitar lens requires a "T" mount, it won't unless you already have a "T" mount on the lens. Likely the 600mm is an F8. A 2x TC would make it an F16... Good luck being able to view much thru the viewfinder at that F stop... Has to be in full midday sun just to be able to see...
marc gardner wrote:
I have a vivitar 600 lens that requires an adaptor mount. I"ll bet the price if shipping that your tele converter will work with it. If you still have it, let me know how much shipping and I will get it out.