27/10/2025
Sun 24-40mm F3.5, according to the www, one of the first decent small zooms made and gets decent reviews for an 80's lens but as I bought it broken, it needs fixing, so a quick post about it, it needs more work as there is no information on the www about any repairs for this so working blind, this is the first stage.
The little 'aperture' blades weren't moving and the zoom function was jamming at 28mm, also the Auto function wasn't working, and the mount was loose.
Sorted out the loose Olympus mount as it is an interchangable type [YS] and just needed tightening up, what is interesting is that it has 2 mounts, once you remove the attached one it becomes a T Mount, which is another type of interchangable mount originally developed in 1957.
Managed to get in and sort out the aperture blades and get the Auto working, it now Zooms in and out but only in Macro mode so something stilll not right, as I found a bent pin and loose parts inside, it's either been messed with before or mistreated badly, to be continued....