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01-10-2012, 09:45 PM   #1
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For DA*60-250mm owners, is it too soft?

Hi DA*60-250mm owners, I bite the bullets and got the lens a couple of weeks ago. The image at 250mm f4 seems a bit soft. While softness is fine, I do NOT want to have a defect. See attached photos which are cropped at about 1:1. Is it too soft?





The whole photo.



I use Kx.

Thanks much!!!!


Last edited by yyyzzz; 01-11-2012 at 06:39 PM. Reason: typos
01-10-2012, 10:28 PM   #2
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To me it.looks.like camera shake. The first two are blurry. That is indicitive of a long focal length and not using a tripod or something to keep the camera still.
01-11-2012, 01:55 AM   #3
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With due respect

With due respect, I know the differences between softness due to CA and softness due to hand shake. I do not see the same softness for f5.6 or smaller aperture at 250mm.
01-11-2012, 02:08 AM   #4
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Way way way too soft (times 100). What was the shutter speed?

01-11-2012, 04:45 AM   #5
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That is exactly the same result I got from the 60-250mm I tested in store, with my K20D. I was set on buying that lens but after seeing the results I was left feeling disappointed.

Suffice to say, I ended up buying a Tamron 70-200mm f2.8
01-11-2012, 05:52 AM   #6
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Those weren't due to camera shake. They look diffused. Whether it was due to BF/FF or optical misalignment is uncertain.
01-11-2012, 06:53 AM   #7
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wlachan hit it on the spot I think - I've seen a lot of 60-250 shots (had to compare when deciding to get that or the Tamron 70-200) and it is no slouch at any focal length or aperture. What your shots are showing is not typical to the lens.

For example:



That is from the lens review section testing the 250mm at F4. It has none of the "softness" your shots show (and is damn sharp to me).
01-11-2012, 08:27 AM   #8
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I would guess either OOF or blur due to SR not ready.

01-11-2012, 05:51 PM   #9
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QuoteOriginally posted by wlachan Quote
Those weren't due to camera shake. They look diffused. Whether it was due to BF/FF or optical misalignment is uncertain.
I've seen more than one example of this already and if what you state is correct, then the QC of Pentax is a bit lackluster.
01-11-2012, 06:15 PM   #10
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QuoteOriginally posted by yyyzzz Quote
Hi DA*60-250mm owners, I bite the bullets and got the lens a couple of weeks ago. The image at 250mm f4 seems a bit soft. While softness is fine, I want to have a defect.
Well, if you want to have a defect, there are plenty around, you shouldn't have to look hard.
Repeat your "test" on a sturdy tripod, ensuring the focus is spot on and that you are using the self timer. 250mm on APS-C is a very long focal length. You are way out of easy hand holding territory, shake reduction or not.
01-11-2012, 07:42 PM   #11
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OK OK OK! Here are two more with tripod and 1/3200 sec. shutter.

I used tripod when taking this one. Shutter speed is 1/3200 sec. which is no slow. ISO 200. Shot at 250mm f4. It is almost as soft my old 85mm at f1.8. I think there is evidence of aberration.

I am particularly looking for suggestions from those who HAVE this lens. Is this normal? I have 7 days to get this replaced.

Despite the possible problem, I LOVE the color from the lens. Would not hesitate to get a replacement if it is a defect.



1:1 crop


Last edited by yyyzzz; 01-12-2012 at 01:55 PM.
01-11-2012, 07:49 PM   #12
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I think your lens has a defect, it looks familiar with the issue im having with my F*300:
https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/168224-f-fa-30...rformance.html
01-12-2012, 07:00 AM   #13
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hmmm...now I'm wondering if my 60-250 is defective too. I don't find it that sharp wide open. It sharpens up nicely if you stop it down a little though...
01-12-2012, 10:10 AM   #14
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What is 1:1 crop? If that is a 100% crop, I think its fine. If it is just resized its a tad soft. Your top shots are extremely soft. I own the lens.
01-12-2012, 10:19 AM   #15
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QuoteOriginally posted by kenyee Quote
hmmm...now I'm wondering if my 60-250 is defective too. I don't find it that sharp wide open. It sharpens up nicely if you stop it down a little though...
Well it does need a little stop down at 250mm to get real sharp, but it is still good at 250m and f4.

Did a test with it when I bought mine:
https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/143968-da-60-250mm-f4-test.html
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