> << I have a 28-135 Canon IS lens. When I point it down, the barrel slides > all the way out. It doesn't fall out on the floor, it just slides out > the lenght of its extension. I'm sure this can be tightened and > corrected but I'm wondering if it's the kind of thing I might be able to > do myself. >> > > Good question because one of my lenses is doing that as well. I have a Tokina > 80-400 and it slides out, too. I would also be interested in hearing from > people about this. Thanks! there were some nice tamron manual lenses in years gone by that had a magical engineering fix to prevent this.. I never pulled one apart to wee how they achieved such a smooth transitional zoom and such a positive lock but it' a shame we don't see this on more modern zooms k
