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09-15-2012, 08:02 PM   #1
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Pentax mid level zoom quality

Hi apart from waiting for the eventual K-3 type camera to come out someday I have been thinking about Pentax lenses lately. I am awaiting Pentax's next move before I move up on a new body because the next body I will keep for atleast a few years and I want to be ahead of the K5ii.


My coworker shoots Canon and we do a bit of weddings together throughout the year. She actually only has a 20d, she too is awaiting what Canon's entry level FF will be like. Anyway she uses this lens, Canon EF 24-70 2.8 and we both agree, as does seemingly everyone else, that it is an amazing lens. The second gen one that just came out seems to be even better. I was wondering is there a lens Pentax produces that matches or atleast is similar to this lens?

I feel like if I am going to wait for the next new Pentax I should make sure I will be well rounded with both lens and body. I need to start saving money ahah.

Thank oyu.

09-15-2012, 08:36 PM   #2
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The Canon 24-70 ƒ/2.8 costs $2300 and Pentax currently offers only rumors of a full frame body.
Lensrentals indicates that the new 24-70 is astonishingly good, LensRentals.com - Canon 24-70 f/2.8 II Resolution Tests, in some cases better than Canon's top primes with top quality construction to boot.

If you want something like the 24-70 with a full frame body, your best bet is to switch. Nothing Pentax makes can match or be similar to this.

However, for about $230 in the marketplace you can get a Pentax 16-45mm ƒ/4.0 lens, which is a standout example of Pentax bang-for-buck and great quality.
09-15-2012, 08:36 PM   #3
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I think the FA*28-70 compares favourably.

I know that the Sigma and Tamron midrange zooms for FF are a bit weaker wide open compared to the Canon one, but the FA*28-70 has some fantastic reviews.
09-15-2012, 10:33 PM   #4
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Pentax? No, nothing similar. However, others produces lenses for K mount. The Sigma 24-70 has excellent reviews: Sigma 24-70mm f/2.8 IF EX DG HSM Autofocus Lens for Pentax

09-15-2012, 11:28 PM   #5
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None of the options mentioned are viable replacements even if only because of range. The DA16-45 does indeed come close at least from a range POV but I'd hesitate to call it a stellar performer. The DA17-70mm comes close. As said, if you need that range at that performance level, you'd have to switch. If and when Pentax eventually brings out a FF, the Sigma would come closest IMHO.
09-16-2012, 01:29 AM   #6
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I don't know why a Sigma 24-70/Pentax 28-70/Tamron 28-75 on a K-5 is much different in term of range than a 24-70 on a Canon 20D. ;-)
09-16-2012, 07:33 AM   #7
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QuoteOriginally posted by Aegon Quote
If you want something like the 24-70 with a full frame body, your best bet is to switch. Nothing Pentax makes can match or be similar to this.
QuoteOriginally posted by Zav Quote
I don't know why a Sigma 24-70/Pentax 28-70/Tamron 28-75 on a K-5 is much different in term of range than a 24-70 on a Canon 20D. ;-)
Uhhh, crop factor, maybe? The post was talking about a 24-70 on a FF body.
09-16-2012, 08:02 AM   #8
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QuoteOriginally posted by newmikey Quote
Uhhh, crop factor, maybe? The post was talking about a 24-70 on a FF body.
If we're talking about crop factor equivalent lenses, the Sigma 17-50 performs equally with the Canon 24-70. The Tamron 17-50 comes close, but is weaker on the long end.

If we're talking about the same FL lenses, the Sigma and Tamron 24-70/28-70/28-75 fall short, especially on the long end. I assume the Pentax 28-70 performs as well in sharpness, but I don't have any metrics that say so.

The 17-70s will not compare, and the 16-45 performs close to the Tamron 17-50, but not as good. The DA*16-50 definite does not have as good sharpness as the Tamron/Sigma 17-50.

09-16-2012, 08:25 AM   #9
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Hummm the way I read it, the op says that his co-worker uses at the moment a 24-70 on a 20D. But maybe it's just me. I don't want to argue here.
09-16-2012, 08:35 AM   #10
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QuoteOriginally posted by Zav Quote
Hummm the way I read it, the op says that his co-worker uses at the moment a 24-70 on a 20D. But maybe it's just me. I don't want to argue here.
You're right, I didn't read far enough up. Sigma should cover that as well as the DA17-70. On FF the search becomes harder.
09-16-2012, 08:54 AM   #11
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QuoteOriginally posted by Billium28 Quote
and we both agree, as does seemingly everyone else, that it is an amazing lens
I'm not sure everyone agrees that the Canon 24-70 is an amazing lens. There's been complaints about it for years because it's not as good as the Nikkor 24-70 or the Sony-Zeiss 24-70, which is why Canon probably decided to update it.

I've seen very large prints (i.e., 48 x 32) from the Canon 24-70, and while they were impressive for their sharpness and clarity, I wasn't overwhelmed. At more normal printing sizes, I don't think you'd notice much difference between that Canon lens and the Tamron 28-75 or the Sigma 24-70.

QuoteOriginally posted by JinDesu Quote
I think the FA*28-70 compares favourably.
The only complaint I've ever heard about the FA* 24-70 (other than the price) is that some claim it's "soft" wide open, particularly at the wide end of the lens (and the Pop Photo tests seem to bear this out). So it's possible the Canon is sharper wide open. But from the images I've seen from each lens (admittedly, mostly at web resolution) it's no contest: the FA* 28-70 seems better: better microcontrast, better color rendition, better looking images all round.
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