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07-05-2012, 03:00 PM   #1
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Pentax DA* 60-250mm @ 250mm vs DA 55-300mm @ 300mm resolution

With both lenses wide open and stopped down by one stop, does the DA* 60-250mm lens at 250mm produce output with more detail than the DA (or DA L) 55-300mm lens at 300mm (after accounting for the focal-length difference to ensure consistent magnification)?

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07-05-2012, 03:13 PM   #2
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Never used the 55-300, but the 60-250 stopped down is a very nice sharp lens.

The sweetspot is f7.1 at 250mm.
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07-05-2012, 03:15 PM   #3
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QuoteOriginally posted by DragonLord Quote
With both lenses wide open and stopped down by one stop, does the DA* 60-250mm lens at 250mm produce output with more detail than the DA (or DA L) 55-300mm lens at 300mm (after accounting for the focal-length difference to ensure consistent magnification)?

--DragonLord
Yes it does
07-05-2012, 03:19 PM   #4
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The Photozone MTF figures on the K10D, with the lenses at f/8,
suggest that the DA* cropped should do better than the DA(L) at the edge,
but a little worse at the center.

07-05-2012, 03:23 PM   #5
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QuoteOriginally posted by DragonLord Quote
With both lenses wide open and stopped down by one stop, does the DA* 60-250mm lens at 250mm produce output with more detail than the DA (or DA L) 55-300mm lens at 300mm (after accounting for the focal-length difference to ensure consistent magnification)?
My DA*300 wide open is literally light years ahead of the 55~300 at any aperture or focal length combination in sharpness/IQ - I mention the DA*300 as some users note the 60~250 is pretty close in IQ to it, so yes, I would think it resolves quite a bit better.
07-05-2012, 06:35 PM   #6
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QuoteOriginally posted by stormtech Quote
Yes it does
No more discussion needed.
07-05-2012, 07:31 PM   #7
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QuoteOriginally posted by panoguy Quote
No more discussion needed.
Do you truly want me to ask for the thread to be closed, or is this a joke?

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07-05-2012, 08:53 PM   #8
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QuoteOriginally posted by DragonLord Quote
Do you truly want me to ask for the thread to be closed, or is this a joke?
Joke, of course, but with some truth to it. You asked a very specific question and got the answer, and I highly doubt you'll get much dissenting opinion. The 55-300 starts to shine at f/8-f/11, not at the wider apertures you're asking about, where the 60-250 will clean it's clock! I guess that's what you get for an extra $1000...

07-07-2012, 05:01 PM   #9
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I used to own the DA 55-300mm, as well as the FA J 75-300mm and Sigma 70-300mm. Of those three, I think I liked the image quality of the Sigma the most and the FA J the least, but IQ was really very similar on all three. They're all nice portrait lenses in good light, and can do some light-duty wildlife work as long as the pictures are down-sampled sufficiently. But none of them are made for pixel-peeping.

I've never used the 60-250mm f/4, but the image quality is supposed to be almost as good as my Sigma 100-300mm f/4 (I'll keep the Sigma, please), so I would expect to get more detail from those lenses at 250mm than the cheap lenses at 300mm.

Now Tamron has a new consumer 300mm zoom lens in the form of the Tamron AF 70-300mm f/4-5.6 SP Di VC USD that is actually very sharp, even at 300mm. Unfortunately, Tamron seems to be boycotting Pentax-mount in their recent designs, so it is not available in K-mount. This is particularly frustrating since we don't have an abundance of good telephoto options. I've emailed Tamron a couple times, but haven't gotten encouraging responses.
07-07-2012, 05:16 PM - 1 Like   #10
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I have both.
The DA*60-250 is *much* sharper wide open and *infinitely* faster focusing. And weather proof.
I still use the DA55-300 for lightweight travel. It's an excellent performer for the price.
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