Geesh, at least clean the nose hairs off that dental pick before you use
it again! ;)
rg
Don Sanderson wrote:
Hi Dave, (Also sent to the PDML for anyone interested or comments.)
Here's a shot of a lens mount with the adapter ring in place:
http://donsauction.com/pdml/53web.jpg (180k)
This shows the lock spring position in relation to the "Red Dot".
I would drill the hole about 2.5mm to the left of the dot.
Here's a shot with the lens mounted:
http://donsauction.com/pdml/59web.jpg (221k)
The tip of the dental pick shows the position and angle that I
would drill to reach the lock spring.
Notice that the _tip_ of the pick is at about a 45 degree angle
to the lens mount, don't go by the angle of the large part of
the pick, just the very tip.
A 1mm to 1.5mm hole should be sufficient, the smaller the better,
less dust.
If you keep blowing the drill dust clear as you work very little
should get inside the camera.
Be sure to rotate the lens as far as possible clockwise (as viewed
from the front) before inserting the needle, this will take the
pressure off the lock spring and make it easier to release.
Try to get the hole in the correct position on the first try,
once a hole is all the way thru you will be getting much more
dust inside the camera if you have to re-drill.
Get ALL of the dust out of the body BEFORE you fire the shutter!
Good Luck!
Don
-----Original Message-----
From: dave g [mailto:[EMAIL PROTECTED]
Sent: Thursday, October 13, 2005 2:50 AM
To: Don Sanderson
Cc: don
Subject: Re: Pentax lens stuck on camera/adapter *Comments*
Hi Don, thanks you're fantastic. I'm a bit worried about sending the
camera off to pentax (price, being without it for 3-4 weeks or more, the
supervisor already said something about not guaranteeing old lenses and
it's probably the lens at fault).
Could you explain to me about drilling the hole and I'll tell my local
guy here, who's wonderful in every respect (he spent about 1.5 hours
yesterday with me for free trying to get the lens off with a feeler
gauge to trigger the pin, but it confirmed what you just said, he
couldn't get "above" the release pin for the auto/manual ring).
Thanks again!
Dave
On Wed, 12 Oct 2005 21:01:25 -0500, "Don Sanderson"
<[EMAIL PROTECTED]> said:
I found an SMC Takumar 50/1.4 to play with.
Here's what I found:
1.) Taking the lens apart from the front doesn't let you get to the pin.
2.) I can see how the pin could catch in the adapter ring but only if
the lens is about almost 1/2 turn unscrewed OR the pin caught when the
lens was being installed and is now bent and jammed between the adapter
and the lens itself.
3.) The pin is small but very hard steel and will be hard to break off,
especially if bent in that direction.
4.) I put the lock spring back on a Pentax M42/K adapter, installed it
and tried to force it back off. I'll *never* try that again, I could see
the entire lens mount flexing on the ist-D!
(I take all the lock springs off before use.)
You have three choices I can see:
1.) Try using moderate (no grunting) force and hope the pin lets go.
2.) Drill a tiny hole in the lens itself so a needle can be inserted
to release the lock spring. I can show you where the hole needs to be.
3.) Let Pentax do #2 for you. In my opinion they should do it for free
for not warning against this possible problem, assuming the adapter is
a genuine Pentax one.
Thanks for the education in what to watch out for, I'm sorry it had to
be at your expense.
Don
-----Original Message-----
From: dave g [mailto:[EMAIL PROTECTED]
Sent: Wednesday, October 12, 2005 6:24 PM
To: [EMAIL PROTECTED]
Subject: pentax lens stuck on camera/adapter
William Robb suggested I contact you regarding my lens problem/camera
problem.
Here's the story:
Takumar 1.4 SMC lens
Pentax K mount adapter
Pentax Ist DS camera.
I can't get the lens off the adapter, which is on the camera (and you
can't take off the adapter without squeezing the springy thing with a
fingernail to release it - which is not possible with the lens on it).
I've had this lens on and off before but something is catching now.
Also, the auto/manual switch is stuck on auto, which must be somehow
related...?
It's stuck, not mis-threaded and I'm a bit at a loss. Do you
know how to
get this lens off (at this point if it involves destroying the lens or
adapter it's ok!). Is it possible to dismantle the lens carefully to
get at the necessary components? We tried getting a feeler gauge in
between to push that pin that releases the auto/manual lens pin, while
simultaneously pushing the auto/manual switch towards "auto". Not
happening. My camera expert here seemed to think that dismantling the
lens would get us to the necessary access but he wasn't sure. A little
while ago, someone suggested just forcing the lens to turn. Correct me
if I'm wrong, but the first thing to break would be that pin
(wonderful), the second thing to break would be the adapter (even
better) and he couldn't think of anything that might break in
the camera
(Digital Ist DS - would be very expensive if something did
break). What
do you think?
Thanks for any assistance, if you prefer I call you (I'm in the UK)
please give me your number and I'll make sure to call at a reasonable
hour. thanks again,
Dave
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