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mamonmon · 03-09-2012, 12:48 AM

Hi all,

i own a Pentax DA* 50-135mm lens for my k7. is the Tokina atx 28-70 f2.6-2.8 Pro a great compliment to it?

Thanks!

rob1234 · 03-09-2012, 03:04 AM

Not half as sharp wide-open in my experience, but a match by f/5.6...

mamonmon · 03-09-2012, 06:00 AM

Originally posted by rob1234

Not half as sharp wide-open in my experience, but a match by f/5.6...

Oh i see. In terms of focal length? Tokina has a crop factor so 42mm at wide.

hcc · 03-09-2012, 06:19 AM

Originally posted by mamonmon;1859752.:

.Tokina has a crop factor so 42mm at wide.

On your K-7, 50mm is always 50mm for all the lenses, and 28mm is always 28 mm. Full stop.

The DA*50-135mm and Tokina 28-70 have hence very different focal length coverage on your K-7.

DSims · 03-09-2012, 06:35 AM

From my research in the past I decided that the Tokina AT-X 280 AF PRO 28-80mm f/2.8 is better. But I didn't end up getting either one, and eventually I got the DA*16-50 (after I'd already filled in that focal range with primes).

I think the price is bit higher, but not that much (as the lens review database average would have you believe - my guess is the 1300 price is actually in a different currency).

The DA*16-50 is not as good as the 50-135 (but few lenses are). However, it's still good, and it's a good compliment to it. Just take a look at the huge number of DA*16-50 photos on the Pentax Photo Gallery, if you don't believe me. I'm glad they're updating it, but it gets the job done. It's a little weak from ~16-20mm, but good after that. I have a DA15 so I don't mind. It sounds like you wouldn't mind either, since you're looking at 28-70.

rob1234 · 03-09-2012, 06:41 AM

No, I meant with the aperture wide open - pretty soft across the entire zoom range. However, as I said, very sharp at f/5.6 up; maybe good for portraiture, but I prefer sharpness.

Have you tried a Tamron 17-50/2.8 or 28-75/2.8? Both very sharp and cheap.

mamonmon · 03-09-2012, 08:29 AM

I also have the tamron 17-50mm. I want somewhere in between the 17-50 and 50-135mm. Is the iq of 17-50 better than the tokina?

rob1234 · 03-10-2012, 04:40 AM

Much better (although can only compare my copies).

mamonmon · 03-11-2012, 06:02 PM

Thanks! i'll just keep my tamron 17-50 and da* 50-135 setup. i'll just wait for pentax to release a 20-80 range DA* lens.

03-09-2012, 12:48 AM	#1
mamonmon New Member Join Date: Feb 2009 Location: Philippines Posts: 16	*Pentax da 50-135mm and Tokina atx 28-70 f2.6-2.8 Pro question** Hi all, i own a Pentax DA* 50-135mm lens for my k7. is the Tokina atx 28-70 f2.6-2.8 Pro a great compliment to it? Thanks!

03-09-2012, 06:35 AM	#5
DSims Veteran Member Join Date: Sep 2009 Location: Southern California Photos: Gallery \| Albums Posts: 3,236	From my research in the past I decided that the Tokina AT-X 280 AF PRO 28-80mm f/2.8 is better. But I didn't end up getting either one, and eventually I got the DA16-50 (after I'd already filled in that focal range with primes). I think the price is bit higher, but not that much (as the lens review database average would have you believe - my guess is the 1300 price is actually in a different currency). The DA16-50 is not as good as the 50-135 (but few lenses are). However, it's still good, and it's a good compliment to it. Just take a look at the huge number of DA16-50 photos on the Pentax Photo Gallery, if you don't believe me. I'm glad they're updating it, but it gets the job done. It's a little weak from ~16-20mm, but good after that. I have a DA15 so I don't mind. It sounds like you wouldn't mind either, since you're looking at 28-70. Last edited by DSims; 03-09-2012 at 06:41 AM.*

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03-09-2012, 03:04 AM	#2
rob1234 Veteran Member Join Date: Apr 2010 Location: Wiltshire/Hampshire Photos: Albums Posts: 1,760	Not half as sharp wide-open in my experience, but a match by f/5.6...

03-09-2012, 06:00 AM	#3
mamonmon New Member Join Date: Feb 2009 Location: Philippines Posts: 16 Original Poster	Originally posted by rob1234 Not half as sharp wide-open in my experience, but a match by f/5.6... Oh i see. In terms of focal length? Tokina has a crop factor so 42mm at wide.

03-09-2012, 06:19 AM	#4
hcc Pentaxian Join Date: Nov 2009 Location: Brisbane, Australia Photos: Gallery \| Albums Posts: 4,005	Originally posted by mamonmon;1859752.: .Tokina has a crop factor so 42mm at wide. On your K-7, 50mm is always 50mm for all the lenses, and 28mm is always 28 mm. Full stop. The DA*50-135mm and Tokina 28-70 have hence very different focal length coverage on your K-7.

03-09-2012, 06:41 AM	#6
rob1234 Veteran Member Join Date: Apr 2010 Location: Wiltshire/Hampshire Photos: Albums Posts: 1,760	No, I meant with the aperture wide open - pretty soft across the entire zoom range. However, as I said, very sharp at f/5.6 up; maybe good for portraiture, but I prefer sharpness. Have you tried a Tamron 17-50/2.8 or 28-75/2.8? Both very sharp and cheap.

03-09-2012, 08:29 AM	#7
mamonmon New Member Join Date: Feb 2009 Location: Philippines Posts: 16 Original Poster	I also have the tamron 17-50mm. I want somewhere in between the 17-50 and 50-135mm. Is the iq of 17-50 better than the tokina?

03-10-2012, 04:40 AM	#8
rob1234 Veteran Member Join Date: Apr 2010 Location: Wiltshire/Hampshire Photos: Albums Posts: 1,760	Much better (although can only compare my copies).

03-11-2012, 06:02 PM	#9
mamonmon New Member Join Date: Feb 2009 Location: Philippines Posts: 16 Original Poster	Thanks! i'll just keep my tamron 17-50 and da* 50-135 setup. i'll just wait for pentax to release a 20-80 range DA* lens.

Pentax da* 50-135mm and Tokina atx 28-70 f2.6-2.8 Pro question

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