Nope, I'm sure these screws are fucked up and stuck there.
They were treadlocked. Apply a drop of lacquer thinner to each screw slowly a few times and see if it works. Acetone evapours too quickly so doesn't work.
I screwed loose the back section of the lens and got a little space to look around.
It seemes there's a small spring beneath the thingy that closes down the diaphragm. A part is missing from that spring.
Now, i figured, hell, even if i can remove the bayonette and open everything, i still dont have a spring like that. Where the hell am i supposed to find a teeny little spring that fits exactly?
Pentax parts department, where else? The truth is, you don't need the exact match. Just similar length & maybe width will do.
I give up for now, i hope it's atleast a bit good full open.
Don't give up so soon. :-)
Alan Chan http://www.pbase.com/wlachan
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