MD Zoom Rokkor 50~135/3.5

Without discipline I have stretched my habitual tacticles onto Minolta MD Zoom Rokkor 50~135/3.5 in Yahoo Auction, I bid it at 741 yen then no competitor appeared. Switching over period to New MD model has often green colored "feet" indication and it's specific barrel design makes it easy to disassemble focusing module lens grass removed thoroughly just only by removing decorating and indicating front ring. Mold colony was observed in the chamber between focusing module and zooming front as usual. Green feet indicator MD model do not have Maco construction and it relates on some disadvantage of close-up shooting, 1.5m is the limitation for 135mm condition is applied in 50mm setting. As I have no experience to come across with MD 50~135/3.5 in the market, this model with yellow feet letter indicated had not been produced by Minolta as a matter of fact? Result of shooting test revealed the capability of this new commer, sharpness, resolution and color are good enough for me except excessive close-up shooting distance. As I am keeping standard focus lenses at hand that cover upper disadvantage, inconvenience in the specific close up would be compensated?