1) If you don't need to fix the A50/1.7 you have now, don't disassemble it !!!
2) If you are bound and determined to disassemble it, then
a) go into the kitchen where you have good light and a vinyl floor.
b) do the disassembly in a big tray with tall sides (like for
breakfast in bed).
c) locate the tiny ball bearing by removing the aperture ring very slowly.
d) find and put the bering and tiny spring behind it in a safe place.
3) When you re-assemble the lens, use the index finger of your third hand
to keep the spring and bearing pushed into it's tiny chamber.
Regards, Bob S.
On Tue, May 1, 2012 at 9:15 PM, Darren Addy <[email protected]> wrote:
> The problem is that the ball bearing is held "high" by a spring beneath it.
> You must compress the spring so the ball bearing is low enough to slip
> the aperture ring over.
> Now imagine trying to keep the ball bearing "down" as you slide the
> ring one. As you slide the ring, whatever you were holding the bearing
> down with is in the way. You need something stiff and THIN that will
> be strong enough to hold the bearing in, and yet thin enough that you
> can pull it out from between the aperture ring and the lens when the
> ring is *in place*.
>
> Haven't figured out what that stiff thin thing is yet and I have a
> couple of repaired lenses patiently waiting in baggies for me to
> figure it out.
>
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