Pentax DFA 100MM macro

missmarple
Posted 27/12/2010 - 14:41 Link
Does this lens appear to zoom whilst adjusting the focus. I mean when it focuses real close does this appear to crop the image a tiny bit.Perhaps due to the front element moving so far forward.I have never noticed this before on other primes,but this is the first time I have used a proper macro lens.I have just picked this up from Currys and was going to put it straight on Ebay but thought I would have a little play first, just want to check all is well before passing it on, if I decide not to keep it.

Regards mm
johnriley
Posted 27/12/2010 - 14:59 Link
Many lenses change focal length slightly depending on the focus distance. It isn't really a problem.

If you have an issue with the lens, can you post some pictures to show us what is wrong?
Best regards, John
missmarple
Posted 27/12/2010 - 15:17 Link
Thanks John.

It is not that I have an issue as such. It is just that I had not noticed the effect before and that the box is a little less than perfect. I think I am worrying a little too much. It is also a little noisy when rotating the focus ring. It seems to work by drag,you can keep rotating the focus ring forever at either end of the range,perhaps a property of the quickshift.I am sure if I was not considering selling on, none of this would have concerned me.

Many thanks mm
johnriley
Posted 27/12/2010 - 15:30 Link
The focus ring does continue to move past the end stops, it's normal. If the lens performs well, I wouldn't worry too much. A lot of the boxes that came with the Curry's offer were a bit battered, if indeed that's where it came from!
Best regards, John
Oggy
Posted 27/12/2010 - 15:36 Link
This lens does does feel a bit clunky, but it produces beautiful pictures.

Comment Image
missmarple
Posted 27/12/2010 - 15:54 Link
Thanks Oggy

Just what I wanted to hear. I think I will try to convince myself to keep it tomorrow. I know I shouldn't but might just anyway.

Regards mm
fatspider
Posted 27/12/2010 - 22:38 Link
I would think actually using it and seeing the results would be enough to convince anyone

My Avatar was taken with the 100mmDFA
My Names Alan, and I'm a lensaholic.
My PPG link
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Oggy
Posted 27/12/2010 - 22:42 Link
It along with the 50-135 is my reason for keeping a Pentax body.
Blincodave
Posted 27/12/2010 - 23:10 Link
These reviews might persuade you to keep it mm. I think I might nip down to Currys tomorrow. What are they asking for them?

http://www.pentaxforums.com/lensreviews/SMC-Pentax-DFA-100mm-F2.8-Macro-Lens.htm...

Dave
johnriley
Posted 27/12/2010 - 23:13 Link
You will be very lucky to find the Currys/Dixons/PC World offer now as the web offers have finished.
Best regards, John
doingthebobs
Posted 27/12/2010 - 23:23 Link
I know what you mean about it feeling a bit strange, especially the focus ring continuing to move after the end stops. When I got mine I thought it was broken but after being reassured by the chaps here that it was supposed to be like that I got on and used it.

That's the best thing to do is get out and use it, you won't want to get rid of it then!

Must be one of my most used lenses and would probably be one of the last to go, if I had to sell up my kit.
Bob
doingthebobs
Posted 27/12/2010 - 23:34 Link
By the way I've had mine about 18 months and it came from PC world/Currys on a previous offer.
Bob
missmarple
Posted 28/12/2010 - 09:08 Link
Blincodave, if you can find one they will cost £250. They are very rare now though. I saw this after looking for weeks and picked it up as I thought I could make a little profit to go towards a 12-24.Good luck in your search.

Thanks all for your comments, I am much happier now, either way I decide to go.
Regards mm
Blincodave
Posted 28/12/2010 - 12:08 Link
Predictably, nothing in my local store. I notice somebody has 4 on E Bay at the moment at £345. I wonder where they came from!?

Dave

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