I have a Sony A7II and a variety of lenses in other mounts and their respective adapters. I've noticed some serious loss of contrast from some of the faster lenses when wide open which I am wondering may be at least partly due to flare and internal reflections in the adapters.
I'd like to try adding some flocking to the adapters and test for improvement. There seem to be a number of far-flung suppliers on ebay and at optical / astronomy suppliers in the US but I haven't found anywhere in Australia. Self-adhesive felt / velour is available at Bunnings and other hardware stores but I suspect that (at least some of) the special purpose material would work better.
Does anyone have any tips about obtaining adhesive flocking or the relative quality of different sources?
*removed - refer to the site rules, in particular rules 3 and 4*