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11-19-2011, 09:43 AM   #1
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50-200mm kit lens ( DA L )

anyone have an idea/opinion as to the sweet spot for this kit lens? aperture and focal lengths where it is sharpest, etc. ? thanks.

11-19-2011, 09:46 AM   #2
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I do not have the DAL version, I have the DA WR version - the sweet spot for that one seems to be between 9 and 11, not sure if that helps you any though...
11-19-2011, 09:51 AM   #3
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The DA L and the WR versions use the same optics, so that advice should work! The 50-200mm isn't the sharpest tool in the shed, but stopped down it'll definitely get the job done.

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11-20-2011, 02:16 AM   #4
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QuoteOriginally posted by dh4412 Quote
anyone have an idea/opinion as to the sweet spot for this kit lens? aperture and focal lengths where it is sharpest, etc. ? thanks.
I've got some test shots at Collection: SMC Pentax DA 50-200mm f4-5.6 ED WR.
Things may be different for the DA L or even just for a different sample of this lens.

11-20-2011, 12:28 PM   #5
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I have the DA WR version too... I think I have a good copy (many complain about the 50-200) as it's fairly sharp throughout but 'Sharp' from f8...
11-20-2011, 05:27 PM   #6
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QuoteOriginally posted by dh4412 Quote
anyone have an idea/opinion as to the sweet spot for this kit lens? aperture and focal lengths where it is sharpest, etc. ? thanks.
Isn't this what the Program Line is good for in these digital cameras? Set your camera in Green Mode, select the lens parameters, (slow, medium, fast) use the 50-200 and note what apertures the camera suggests.
Does this sound practical? Maybe not reasonable but...
11-20-2011, 05:47 PM   #7
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QuoteOriginally posted by Nowhere Matt Quote
Isn't this what the Program Line is good for in these digital cameras?
No - all lenses have different characteristics (even copy to copy can change), the sweet spot generally means at what settings will provide the absolute best balance between Resolution, Sharpness, and IQ (sat,con); current focal and aperture play the key roles in this.





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11-20-2011, 05:56 PM   #8
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Here are a few pics taken earlier this evening with the 50~200 WR version. I was out hoping for some "fire in the sky" multi-exposure shots with the K5 - I was thinking of this thread so also took a Kx and the 50~200 with me just to pop some IQ samples:

(NOTE: Keep in mind all of these were shot with relatively high ISO with the Kx and also these were uploaded to the photo album here so they are compressed)

f/8, 1600ISO


f/8, 1600ISO


f/11, 1600ISO


THIS ONE WAS SHOT IN HEAVY DOWNPOURS LAST WEEK (only one not shot earlier today)
Green Heron
f/5.6, 1000ISO








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11-21-2011, 07:30 AM   #9
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this is what i've suspected, looks like a pretty good lens for sharpness , autofocus works well ?
11-21-2011, 07:37 AM   #10
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QuoteOriginally posted by dh4412 Quote
autofocus works well ?
As far as I can tell it's as fast as any of my AF lenses and no BF/FF issues
11-21-2011, 07:45 AM   #11
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Well, the AF speed is zippy (due to its small design), AF is screw mount so it works just as well as the other screw mount zooms. Obviously like most others on pentax bodies the zoom hunting is there in very low light but that is more the pentax's AF system fault and not really the lens. I purchased the lens for a beater lens, something that can be used and abused in all types of conditions (wet, muddy, etc) and I wouldn't have to constantly worry about having to replace a very expensive lens - a little over $200 is mere pocket change these days...










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11-21-2011, 07:46 AM   #12
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for long zoom then, this looks pretty good; now for wide angle, any one have opinions on 12-24, vs 15mm, vs 21 mm, if i can get only one which one ? and which is the best autofocusing of those? thanks
11-21-2011, 08:01 AM   #13
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QuoteOriginally posted by dh4412 Quote
one have opinions on 12-24, vs 15mm, vs 21 mm, if i can get only one which one ?
I don't have either... But I do suggest you search flickr.com... Nearly every lens you can think of has its own group on flickr, so it's a great place to see what they can do...
11-21-2011, 09:35 AM   #14
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QuoteOriginally posted by joe.penn Quote
Well, the AF speed is zippy (due to its small design), AF is screw mount so it works just as well as the other screw mount zooms.
I think you mean screw DRIVE, not screw MOUNT. Haven't seen many AF M42's lately...
11-21-2011, 11:03 AM   #15
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Yes rio, you know what I mean...
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