On 5/2/2012 11:11 AM, Toralf Lund wrote:
On 5/2/12 14:45, Walt Gilbert wrote:
Ah, I see.
This is clearly a task best left to people who know what they're
doing. I thought maybe, for once, it might be a reasonably simple fix.
I don't think you ought to be too put off by the comments here. Yes,
the ball bearing thing makes it all a bit fiddly, but what it requires
to get it right falls more in the category of "patience" than "knowing
what you are doing"... Oh, and holding the thing over/inside a tray of
some sort is excellent advice. I believe I used a rectangular ice
cream box (after eating the ice ;-)) on once instance.
- Toralf
Thanks, Toralf!
Now that you mention it, I figure I have nothing to lose by taking apart
the completely useless lens first and, if it looks like it's going to be
too much trouble based on what I see, all I will have lost is a
completely useless lens.
-- Walt
I'll just leave it be and use it as an M lens until I find that "Free
Lens Repair" place nobody's been talking about.
Thanks to all for the input! Maybe someday, when I feel adventurous
enough to risk having two useless lenses, I'll take it up again.
-- Walt
On 5/1/2012 10:44 PM, Bob Sullivan wrote:
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<pixelsmi...@gmail.com>
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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