Vivitar and Soligor did not make T4 or TX mount adapters for this Mamiya. I also don't remember Tamron making any adapters for it. The earlier TL and DTL Mamiya SLR cameras had the M42 mount so Mamiya made two adapters for M42 lenses. One has a wider flange than the other but they both work the same and allow for stop-down metering. The other choice would be T mount lenses. There were T to ES adapters made. You don't get auto diaphragm operation but you do get correct infinity focus. The two standard lenses, the 28 (both versions), the 135, the 200 and the 90-230 are reasonably priced. The 21, 35, 60 Macro, 85 and 105 cost more. The 400, which shows up occasionally, can be high or low. My favorite must be the 60 Macro. I don't think anyone, including Mamiya made Auto extension tubes in ES mount and I don't remember seeing a reversing ring either, unless it comes with the bellows.