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09-17-2010, 06:32 PM   #1
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70-300mm Lens Question

Hello All! I am on a tight budget but need to get a long lenses for my K10D camera. I am looking at the Tamron AF 70-300 f/4.0-5.6 Di LD Macro Zoom and the Sigma 70-300mm f4-5.6 DG Macro Telephoto Zoom. Both are in the $150 range. Thoughts?

09-17-2010, 06:58 PM   #2
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Welcome here.
There are many discussions about these two lenses on the forum.
The general consensus is that the Tamron is better quality in terms of image results, but almost rivalled by Sigma's APO version of the DG lens (yes the APO and non-APO versions are different). I have used the Sigma non-APO version and wouldn't ever go back to it.

Of course, if you were able to save up a few more dollars, Pentax's DA 55-300 is a vastly improved telezoom and is the best value for money by far.
09-17-2010, 07:03 PM   #3
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QuoteOriginally posted by HuskerMann Quote
Hello All! I am on a tight budget but need to get a long lenses for my K10D camera. I am looking at the Tamron AF 70-300 f/4.0-5.6 Di LD Macro Zoom and the Sigma 70-300mm f4-5.6 DG Macro Telephoto Zoom. Both are in the $150 range. Thoughts?
I've only had and used (still do at times) the Tamron flavor. I would Readily recommend it to someone in your situation. Do be aware however, that like any other megazoom type lens, it has it's weak spots. Particularly at the long end. It Does get slightly soft. Also, Wide open apertures with this lens, you will see a lot of purple fringing. Not incorrectable with some small effort but it's there. From My copy...

Show Tamron - a set on Flickr

Tamron Di 70-300 pictures by jjkyle - Photobucket

09-17-2010, 09:35 PM   #4
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On your budget - exactly as Jeff said above (pros & cons), the Tamron 70-300. The added bonus is that the Tamron has a very nice 'real' macro ability (if you call 1:2 macro) whereas many other lenses claiming to have 'macro' really only have close-up 1:3 or 1:4. More lens for your money.

09-18-2010, 08:58 AM   #5
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In addition to the *many* existing threads comparing these lenses (and also compring them to the DA50-200 and DA55-300), see the lens review database on this site. One should always check these first, as there have been literally *hundreds* of thoughts already expressed regarding these lenses, free for just the looking.
09-18-2010, 06:22 PM   #6
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Hello Ash!

Please give me the complete description of the Pentax 55-300 lenses that you refer to on your response. Thanks!
09-18-2010, 06:25 PM   #7
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Thanks Marc. I am very new to this site so I appreciate you pointing that out!
09-18-2010, 06:53 PM   #8
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Or hold out and maybe get lucky to find the Sigma 28-300 DG. I'm really glad I did. I have seen more than a few for under $200.

09-18-2010, 06:54 PM   #9
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I chose the Tamron over the Sigma two years ago when I wanted a telephoto zoom. In short, the tammy was said to be sharper though to have worse PF/CA than the sigma. I'd rather deal with PF than softness. The Pentax version does seem to offer better IQ overall though.

I will say I have very much enjoyed the 1:2 macro ability of the Tamron. You get a great working distance of 3-4 feet.

The Tamron is a bit soft at 300mm though it is decent when stopped down. I find it has the slowest, loudest autofocus of all my lenses however. But for the money, I really can't complain.

If you have too much money, then I recommend the DA* 300mm f/4 which I just picked up. I wonder if the Tamron will ever see my camera again...
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