Hello my dear friends, Im a new member here on PF, although i've been here doing research earlier!
Since im a Swede, i want to start off by excusing for my lack of proper english grammar, and hope that you can understand what i mean!
My first thread is going to be about how the aperture works, and how it's constructed inside the lens!
The thing here is that i bought myself a very cheap lens, a
RMC Tokina, 28mm f/2.8 whose aperture had stopped at full opening (f/2.8),
and since im very keen on learning how stuff works and most of all, how to repair them, i set off in order to try to repair the problem with the stuck aperture!
I now have the lens taken apart, all the glass is out from the tube, and left on the barrel is the aperture-mechanics and the focus-ring!
The problem that i now have, is trying to figure out how the little pin that is sticking out in the back of the lens-mount is gonna be able to regulate the aperture-opening!
I tested on one of my other lenses, and when i push that pin, it opens up the aperture inside the lens, but no matter how much i try, i cant figure out how the "lens-mount-part" is going to be fitted in order to work properly!
Is there someone here that has opened up a lens before, and know's how i should attach the aperture-linking in order to get it working properly again!
There are two spokes that iv'e found, one is normally bound to the aperture ring, and the other one seems to have the task of opening up the blades again!
As i said, im sorry that my english isn't very technical, but i hope that you understand what i need help with?
The very best of regards,
// Daniel