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10-23-2013, 12:35 AM   #16
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I am a very big fan of the DAL 18-55 that came with my K-x. The K-x works wonderfully with that lens. I don't think I ever took a photo with it that wasn't sharp.

I'd suggest some more tests and practice. To see that lens at it's sharpest, shoot between the focal lengths 18 and 35mm, at f5.6 or f8.

PS - as has already been suggested, I hope you aren't using any UV or other 'protection' filters on your lens. If you are, remove the filter and try again.

10-23-2013, 04:58 AM   #17
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I've also got the DA L18-55 and 50-200. My 18-55 is a piece of crap, and I've been trying everything I've learned in the 3 years I've had it, on both the K-x and K-30, and nothing improved from when I started using it. The 50-200 on the other hand is a much better lens, almost on par with my DA55-300 at the same focal lengths. My 18-55WR is not much better than the DA L. If you've done all the tests as everybody suggests, regarding front and back focus, and everything else that might be suggested, chances are that you won't see much change. IMO, to prevent endless frustration, and if you need the wide angle on the lens, rather get something else. I can't even get myself to try and sell it somebody else and have them suffer the same fate....even thought of accidentally dropping it but then the insurance will just give me the same crap again...might use it for a bit of target practice if I get a chance
10-23-2013, 05:34 AM   #18
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QuoteOriginally posted by altopiet Quote
My 18-55 is a piece of crap
I guess sample variation then may be to blame. My DAL 18-55 performs about the same as my DA 18-55 II, and both of those are pretty good lenses - and sharper than my DA 18-55 WR.

If you look at the Lenstip resolution chart for the DA 18-55 AL II (which should be similar to it's siblings like the DAL), you can see that it really is an OK performer, or should be, especially at the centre of the frame as indicated below.
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10-23-2013, 05:53 AM   #19
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Hi everyone,
Thanks for all of the really good advice. I guess more thorough testing is needed. I believe that for this shot I let the lens autofocus and then I manual focused using focus peaking, and this was as good as it got. There was a UV filter on the lens.

The link to the calibration is nice, but those are expensive. Would I get reasonable results if I set up something similar with a ruler?

10-23-2013, 06:00 AM   #20
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QuoteOriginally posted by rawr Quote
I guess sample variation then may be to blame
Might be, I remember when I got the twin kit with my K-x, everybody was complaining about the 50-200mm, and mine is still much better compared to the 18-55. I only use the 18-55WR when I get near the sea, which is about 5 days a year; before buying it with my K-30 everything I've seen in the reviews, suggested it would be much better than the DA L, but in my case only marginally. On the other hand, it might be good enough if you don't have anything else. Having had a few old manual lenses when I came to DSLR, like the K35/3.5, M50/1.4, TAK 55/1.8 etc, it might not be fair to try to compare it with anything else but other brand kit lenses, which I'm not able to do
10-23-2013, 06:06 AM   #21
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QuoteOriginally posted by millsware Quote
There was a UV filter on the lens.

The link to the calibration is nice, but those are expensive. Would I get reasonable results if I set up something similar with a ruler?
Get rid of that filter !

My DA 18-55 WR is reasonably sharp - lots of the time the apparent corner softness when near the 18mm end is caused by CA, correct this either in-camera or in post processing.

As for the focus calibration - the Moire method is a good quick check, otherwise a distant contrasty object works well. Beware of trying to calibrate using something nearer that at least 50 x focal length.
10-23-2013, 06:17 AM   #22
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QuoteOriginally posted by millsware Quote
I believe that for this shot I let the lens autofocus and then I manual focused using focus peaking, and this was as good as it got. There was a UV filter on the lens.
The focus in the first image just seems weird - you can see that some of the top spar of the bridge on the top right hand side is pretty sharp and in focus, but as you move your view forward along the bridge, the sharpness declines, suggesting that the lens was focussed too far back on the bridge and your DOF was too shallow to render enough of the rest of the bridge sharply. Probably if you had shot the scene at f8 or f11, like the A50, the result may have been better.

Also ditch the UV filter. It's unwise to draw any conclusions about the performance of a lens if it has a UV filter on it. Too many UV filters are very poor quality optically.
10-23-2013, 07:46 AM   #23
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I've had pretty good luck with mine. It was reasonably sharp and gave decent colors. I sold it for a lens with a bit more range. Otherwise, it's a good lens.

10-23-2013, 09:20 AM   #24
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QuoteOriginally posted by kh1234567890 Quote
Get rid of that filter !

My DA 18-55 WR is reasonably sharp - lots of the time the apparent corner softness when near the 18mm end is caused by CA, correct this either in-camera or in post processing.

As for the focus calibration - the Moire method is a good quick check, otherwise a distant contrasty object works well. Beware of trying to calibrate using something nearer that at least 50 x focal length.
Thanks,
I'm going to try this tonight when I get home.
10-23-2013, 11:09 AM   #25
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My 18-55mm (that I acquired a few years back with my K-x) is crazy stupid sharp on my K-30. The only reason I don't use it often is because I have other, more versatile lenses that overshadow it.

FWIW, my kid snapped a shot of me with the K-30/18-55mm the other night and it was *too* sharp. You could make out the fine hairs on the tip of my nose.

It should also be pointed out that the 18-55 fares much better in the middle of its range - it tends to get a bit soft at the extremes (much like most cheap zooms do, regardless of maker).
10-23-2013, 11:09 AM - 1 Like   #26
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Hello,

What I managed to do with this lens is:














The thing is as it follows:

It is WR (mine is) . It is tele-zoom (18-55 in one lens) . It isn' t the sharpest, but my `greatest` work was obtained with this lens (this photos; they are not much from a professional standards view, but they are much for me, as I' ve seen a growth) . And this leads me to the second thing I noticed: a good photo (or snap) is good for what it shows, not necessarily for the clarity with which it shows it.

Some of the nicest photos I' ve seen, are on a grainy film, not very sharp but as I' ve said, they are nice.
Bottom line, it' s a good lens, and although I' ve bought many of the lenses on my `wishlist` and managed to replace it, my camera still misses it sometimes (and my feet, as I do some extra walking to `compensate` the fixed focal length) .

Cheers!

Last edited by urssu; 05-15-2014 at 08:21 AM.
10-23-2013, 11:15 AM - 1 Like   #27
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If we're posting 18-55 photo samples we've managed...








10-23-2013, 11:55 AM   #28
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wr 18-55 kit lens.
All sizes | 1855kitlens | Flickr - Photo Sharing!
Back-Focusing example.

Last edited by OldNoob; 10-23-2013 at 12:13 PM.
10-23-2013, 12:09 PM   #29
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Very Cool guys, I Think the 18-55mm is a lot of bang for the buck.

When I bought my K-5 IIs body I ordered the 18-55mm WR just to have an affordable bad weather walk around lens.

My copy has been great and sees a lot of use.


10-23-2013, 12:27 PM   #30
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Nice shots, everyone & I agree the 18-55 is a good lens used within its limitations. FYI, there is already a thread for kit lens photos: https://www.pentaxforums.com/forums/lens-clubs/45425-kit-lens-club.html
It was originally set up to feature shots from the various 18-55's, but recently has been including shots from the 50-200, 55-300, & 18-135 as well.
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