If one was interested in the 50-135, would you close the ebay auction early?

Pm Sent

Sorry peter, I haven't had any time to shoot recently...

As soon as I get some free time i'll report back.

Cheers!

THank you all very very much for your help and advice.

I will have time on monday to experiment with MF - other apertures - longer distances.

Will report on results as soon as I can.

thank you in the meantime.

Nathan

Don,
are you drunk again?

Going to sleep now, thank you all for your help, will pick it up tomorrow morning, and try further experiment.

Good night

"If the focusing screen or the mirror were out of position all your images would be out of focus with all lenses.
It may be that this one lens is not hitting the focus point properly because of a slight error in the mechanics of the lens."


This is what I also think -

What do you think I should do in this case?
a - Call Chris at SRS and see if they have any ideas
b - Pentax suggested bringing them the lens, I am doubtful, as I am not ready to spend a lot of money of the repair or clean process.
c- do something on my own?

Ok now we're talking

- I will try to focus to infinity - I have never noticed issues, but I will check tomorrow morning.

- I have not tried MF - mainly because my eyesight is not that good and I wouldn't rely on it for fine adjustment - but what I have done is focus one body with the normal viewfinder, and it seemed in perfect focus (checking multiple times before shooting) and the other body with the magnifying eyepiece I got recently - and this also seemed to be in perfect focus.

I will try both methods again tomorrow -

I appreciate the fact that focus adjustment only fixes AF - but, is it possible as it seems, that the lens is focused correctly in MF and still shows front focus issues? would this be an issue of the focussing screen, and once this flips to capture the image the distance between sensor and lens is indeed not correct?

Dear John,

I know that the K20 has the option of focus adjustment for up to 20 lenses. I will not buy it anyway, cause I will buy the next in line....

I agree with your point about 'normal use' but it is also true that I use the lens a whole lot, and usually at f1.4 for close up portrait work - so as much as it will not bother me in some of its use, it will make a lot of difference on a rather big part of it.

"It would be interesting if you could find another 50mm lens to try out."
Why so? do you think it might be an issue of the focal lenght? because I have tried 3 zoom lenses at 50mm, and they all perform well. Do you think it might be an issue of the 50mm lens construction? - I am pretty sure that it is something that occurred with time, as I hadn't noticed mis-focus issues until about 1/2 months back, and I've had the lens for 2 years.

Thank you for your help

George,

I truly would love to meet you in person.
I am sure you are not really this grumpy!!!!