David Kilpatrick wrote:One small difference - the Samyang/Vivitar is manual focus and has no chip, therefore offers no focus confirmation and no SSS control...
I was talking about price/optical quality.
manual focus isn't a huge issue (nor the Minoltas or the Zeiss focus fast enough for considere it fopr sport photography) but if you add no focus confirmation and no SSS... I'll go for a 135 2.8 or a 100 macro (second hand market) for that price and I'm still doing the job for 300US$ and I can keep the other 4200 US$ for the holidays or the kid's college fund.
I'm not a collector and I consider I have too much equipment already. I dont GAS anymore.
PS: GAS = Gadget Adquisition Syndrome