I love my 135mm and will never rid myself of it. It is also the old double crossed X version that has contributed to Minolta's myriad problems. I shoot with a 600si and 7. My top favorite lenses are the 50mm f/1.7; the 135mm f/2.8; the 28-135mm f/4-4.5 (a beast of a heavy lens, but wonderful) and for traveling my 35-70mm f/4 and 70-210mm f/4. Neither of the last two are extremely fast, but they are stellar performers. My $.02. Luke