I have been looking for some time for a nice 135 to replace an old Wolly with no luck. But now i see a nice 150 for a good price. If I buy that will i notice the difference? For my lens kit i want 90. 135 and 210. I have a good 210, but before i go to italy this summer wanted to replace my 90mm optar and the Wolly with modern lenses and shutters.