Looking through my printed images in Lightroom, by far the largest number were taken with a 24-70mm zoom, with cluster at 24mm and 70mm (thus proving I am too lazy sometimes to change lenses ). When going for a walk in the mountains I have found my full three zoom kit plus 50mm f:1.4 getting pretty heavy later in the day, so I am plotting to fill out the ends with small pocketable lenses, and just take the DSLR with 24-70mm in a holster. I can pick up on eBay an old Minolta/Sony 20mm for the bottom end and am consider the Sony SAM 85mm for the top end. The problem with the 85mm is the plastic lens mount - a big problem to me. So my questions are, if anyone has this lens, firstly how durable is the plastic mount and secondly, does it look as if it can be removed from the lens and electrical contact strip, and a metal one substituted? I have a few duff lenses I am prepared to cannibalise in pursuit of a lighter load!