From: Alistair Lax [EMAIL PROTECTED]
Date: 2006/04/16 Sun PM 03:44:01 GMT
To: PDML pentax-discuss@pdml.net
Subject: LX focussing problem - update (long)
A couple of months ago I mentioned my LX focus problem, where the top and
bottom of the screen were out of focus in opposite
Alistair Lax wrote:
A couple of months ago I mentioned my LX focus problem, where the top and
bottom of the screen were out of focus in opposite directions. It proved
surprisingly difficult to deal with, although the cause and solution turned
out to be simple in concept and may be of
Hi Alistair,
I didn't snip your post, as many subscribers only seem to read the PDML
through my quotes
On 16/4/06, Alistair Lax, discombobulated, unleashed:
A couple of months ago I mentioned my LX focus problem, where the top and
bottom of the screen were out of focus in opposite
There are rubber bumpers on the mirror supports that are collapsing.
It's a relative of the sticky mirror syndrome. They and probably all
the other rubber parts, including seals, need to be replaced.
Alistair Lax wrote:
I'm delurking for a while, partly to ask the brother- and sister-hood
From: Alistair Lax [EMAIL PROTECTED]
Date: 2006/01/25 Wed AM 07:48:53 GMT
To: PDML pentax-discuss@pdml.net
Subject: LX focussing
I'm delurking for a while, partly to ask the brother- and sister-hood for
their expert advice. I've had an LX for almost 2 years. It doesn't have a
sticky
Thanks Mike. Second one was bought on Ebay - luckily the guy I bought it
from lives on my route home, so I was able to check it over before bidding.
There had been a glut of LX sales, so I got it for a reasonable price.
Alistair
Almost certainly misalignment, possibly a problem with the bumper
- Original Message -
From: Alistair Lax
Subject: LX focussing
I'm delurking for a while, partly to ask the brother- and sister-hood for
their expert advice. I've had an LX for almost 2 years. It doesn't have a
sticky mirror, but it now appears to have a focussing problem. It has the
Hi Peter,
- put the camera onto a tripot.
- glue a transparent tape ( TESA ) over the shutter window or remove the
screen and put it with as much care as possible to the film plane ( with the
correct side ).
- turn the lens to infinity.
- set the camera to B, release and let the shutter stay
Hi,
Here is my take on the LX problem:
1. It cannot be the lens because the peoplem occurs with various lenses.
2. It may be that the screen does not sit properly. Take it out,
inspect it for damage, check the screen bed for dirt or other
obstacles, then put the screen back in.
3. The rubber
At the risk of sounding simplistic could it be the
prism and the diopter settings?
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At the risk of sounding simplistic could it be the prism and
the diopter settings?
Are the labels for the LED's at the right side of the finder clear,
or are they out of focus, too?
Fred
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When I had a split image screen on my LX, *every* single lens that i
have showed (ever so slightly) different inf. focusing (some were
focusing beyond inf. mark, some before). After i put the frid screen,
all my worries disappeared :)
However if the focusing is bad to the point that you can
Thanks for the answer Mishka!
A different screen be a solution of course. It's mostly split image that
shows straight line being non-alligned
But also on the matte screen we can see the lack of sharpness. (Let's say
you focus on some letters on a wall some hundred meters away.) I checked
the
So, please have a check on the alignment of the lens elements. It could be
one reason for out of focus images at infinity.
Could be of course, but we have the same problem with different lenses.
Peter
Peter Smekal
Uppsala, Sweden
[EMAIL PROTECTED]
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This message is from the Pentax-Discuss Mail
At the risk of sounding simplistic could it be the
prism and the diopter settings?
It helps a little to change the diopter settings, but spit image line still
do not align.
Thanks
Peter
Peter Smekal
Uppsala, Sweden
[EMAIL PROTECTED]
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This message is from the Pentax-Discuss Mail List. To
At the risk of sounding simplistic could it be the prism and
the diopter settings?
Are the labels for the LED's at the right side of the finder clear,
or are they out of focus, too?
Fred
Hi Fred,
No. LED's are clear!
Peter
Peter Smekal
Uppsala, Sweden
[EMAIL PROTECTED]
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Danke Heiko!
Your explanations seem plausible! Even if these things are difficult to see.
Peter
Hi Heiko,
on 02 Jul 02 you wrote:
Don't ask me for a source,
Now you can ask;-) Here it is:
http://members.ozemail.com.au/~distudio/lxproblems.html
Hi Antti-Pekka,
Easy to fix? Is it a job for Pentax, or could you do it yourself?
Who is Mr Murphy? Did that apply also to new LX's?
Peter
This problem is related with the sticky mirror problem.
The rubber mirror rest bumpers have too much wear or they are mis-aligned,
making
the mirror rest
My guesses:
0. The finder's diopter adjustment is set to something weird.
1. The mirror can be out of alignment. This can be related to the well-known
sticky mirror bug.
2. The lens mount can be out of alignment. I don't think an LX should have
such problems, but I've seen several (much cheaper)
Peter Smekal wrote:
Who is Mr Murphy? Did that apply also to new LX's?
Mr. Murphy of Murphy's Law fame: If something can
go wrong, it will. The root of countless corollaries,
such as: The likelihood of bread falling jelly-side
down is directly proportional to the cost of the carpet.
My own
At the risk of sounding simplistic could it be the prism and
the diopter settings?
Are the labels for the LED's at the right side of the finder
clear, or are they out of focus, too?
Fred
Hi Fred,
No. LED's are clear!
Then it's most likely due to mirror alignment, which is likely
1. Prism setting(s) have no effect on either film focus or focus screen
focus.
2. Diopter setting have no effect on either film focus or focus screen
focus.
3. Improper focus screen latching will have no effect on film focus, but
will affect focus screen focus.
4. Poorly positioned mirror (the
4. Poorly positioned mirror (the usual problem) will have no
effect on film focus, but will affect focus screen focus.
Actually, Bob, mirror misalignment ~will~ affect film focus, albeit
indirectly. (However, directly or indirectly, the effect is going
to be that the image cast onto the film
I presumed this fact to be intuitively obvious to the most casual observer.
Nevertheless, if the scale on the lens is correct, misalignment of the
mirror will not affect film focus using the scale and a tape measurement.
Regards,
Bob...
From: Fred [EMAIL PROTECTED]
4. Poorly positioned
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