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07-24-2012, 10:56 PM   #1
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What telezoom?

Hello everybody!

I am going to buy a telezoom lens for my K-5 and I choose between a Pentax SMC-DA 55-300/4-5,8 ED and a Sigma 70-300/4-5,6 DG OS. Here in Sweden the price is exactly the same(about 375 ) and both lenses get really good reviews, but i get the feeling that the Sigma lens is a little better.....? Am I right or does anyone think different?

07-24-2012, 11:42 PM   #2
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I think I would go with the Pentax. The reviews here for the Sigma are just ok. But if price and image quality were the same there is still one other difference Sigma weighs 610g and Pentax weighs 440g. I have the DAL version and would not trade it except for a DA version. It is very good, nothing like it in that price range.
07-25-2012, 12:06 AM   #3
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I have noticed the difference in weight. If the image quality is the same i will go for the Pentax lens, but is the omage quality the same?
07-25-2012, 12:06 AM   #4
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+1 on the Pentax. The 55-300 is considered to punch well above it's price point and is one of the bargains in the Pentax range.

Some testing I did with it here, against some much more expensive lenses. Although this is mainly testing with TCs it may still be of interest : https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/139941-lenses-...-x1-4-etc.html

07-25-2012, 12:10 AM   #5
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I haven't owned the Sigma, but I have owned the Pentax. It's a good lens. The 55mm wide end is also an advantage not to be overlooked.

I highly recommend you look at online photos from both if you haven't already. I don't like the look of the photos as much from Sigma lenses in general, and this one appears to follow the pattern.

I would certainly look at pbase.com, Over a million full-size sample photos from SLR cameras with different lenses and digicams., and Welcome to Photozone! for starters.


Personally, I think your real question should be whether to get a DA55-300 or F70-210/4-5.6 (or Takumar equivalent). I believe they both produce better image quality.
07-25-2012, 02:52 AM   #6
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Based on Photozone.de data, Tamron 70-300 is comparable to Pentax 55-300 and much cheaper, with 6 yrs warranty.
07-25-2012, 03:00 AM   #7
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QuoteOriginally posted by kamisu Quote
Based on Photozone.de data, Tamron 70-300 is comparable to Pentax 55-300 and much cheaper, with 6 yrs warranty.
It's an excellent lens (I especially like the true 1:2 macro function) and I had it before the 55-300, but if you check the PF lens database here, or ask any of the many people on this forum who have also owned that lens and then the 55-300, the story is the same. The 55-300 is substantially superior. The Tamron is wonderful value for money, though it does exhibit substantial PF.
07-25-2012, 04:59 AM   #8
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QuoteOriginally posted by peos99 Quote
Hello everybody!

I am going to buy a telezoom lens for my K-5 and I choose between a Pentax SMC-DA 55-300/4-5,8 ED and a Sigma 70-300/4-5,6 DG OS. Here in Sweden the price is exactly the same(about 375 ) and both lenses get really good reviews, but i get the feeling that the Sigma lens is a little better.....? Am I right or does anyone think different?
If I'm not mistaken, the price of the Pentax is lower than what you quote, here: Pentax 55 300 - K May make it easier for you to decide.

07-25-2012, 08:59 AM   #9
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-1 for Sigma.

I am not happy with it... barely using it, mostly just dragging with me. But I got spoiled by primes... If I were me at the moment of buying 70-300, (three years ago, having k200d with kit), I would not do it. I would not buy intermediary lenses.

Think twice why you need these lenses, and maybe you are willing to wait, save and then buy something better? (BTW, saving now for Sigma 70-200 nonMacro 2.8)
07-25-2012, 01:50 PM   #10
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QuoteOriginally posted by Frogfish Quote
It's an excellent lens (I especially like the true 1:2 macro function) and I had it before the 55-300, but if you check the PF lens database here, or ask any of the many people on this forum who have also owned that lens and then the 55-300, the story is the same. The 55-300 is substantially superior. The Tamron is wonderful value for money, though it does exhibit substantial PF.
Since I do not have any of these lenses, I should conclude that data from Photozone is not much reliable, as it says Tamron 70-300 is sharper than Pentax 55-300, but opinion of people that have used both is more reliable BTW, they also say DA40 is not sharper than Tamron 17-50, while according to PF members it is.

I wish there was a really sharp lens like Tamron 70-200 2.8, but not that much heavy.
07-25-2012, 01:56 PM   #11
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QuoteOriginally posted by kamisu Quote
Since I do not have any of these lenses, I should conclude that data from Photozone is not much reliable, as it says Tamron 70-300 is sharper than Pentax 55-300, but opinion of people that have used both is more reliable BTW, they also say DA40 is not sharper than Tamron 17-50, while according to PF members it is.

I wish there was a really sharp lens like Tamron 70-200 2.8, but not that much heavy.
Well definitely not in the same class as the Tamron you just mentioned, which is a superb lens, but there is the much lighter F70-210/4-5.6 that DSims mentioned above. If you check the link above to the testing I did (as I have that lens as well) then you'll see that it is sharper than the 55-300 and also takes a TC better too. It should be cheaper still than even the DAL version of the 55-300 .... but you are giving up the 55 at the wide end.
07-26-2012, 11:33 PM   #12
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I bought the Pentax lens!
I haven't seen the pictures for real yet since i went away the same day, but when looking at the cameras dispaly i must say it looks promising.

Now i must replace the 18-55 kit zoom that came with the camera and wich i am not very happy with.
Here i plan on getting a Tamron lens by the way. The 17-50 f.2,8
07-27-2012, 02:05 AM   #13
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QuoteOriginally posted by peos99 Quote
I bought the Pentax lens!
I haven't seen the pictures for real yet since i went away the same day, but when looking at the cameras dispaly i must say it looks promising.

Now i must replace the 18-55 kit zoom that came with the camera and wich i am not very happy with.
Here i plan on getting a Tamron lens by the way. The 17-50 f.2,8
Which is an excellent lens and a huge improvement on the 18-55.
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