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03-22-2016, 09:11 AM   #1
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Dfa 70 200 vs tamron 70 200

Both copies in my hand.
Dfa 70 200 exhibits focus breathing quiet a bit. I meant a lot. Also, focusing speed feels little slower, too.
I'll be keeping my copy for better iq and wr, but little disappointed to be honest.

Anybody has any first impression on this new lens?

Do you guys think that it's $1000 better than tamron lens?

03-22-2016, 09:24 AM   #2
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Please post examples from both! I have the Tamron, and am not sure if it would be worth an upgrade to me considering what I already have.
03-22-2016, 10:00 AM   #3
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Heck, I was kind of hoping that we would be seeing quite the flooding of the market with used Tamrons, with some deals to be had as a consequence. Now, perhaps not so much.
03-22-2016, 10:16 AM   #4
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QuoteOriginally posted by sjyoon20904 Quote
Both copies in my hand.
Dfa 70 200 exhibits focus breathing quiet a bit. I meant a lot. Also, focusing speed feels little slower, too.
I'll be keeping my copy for better iq and wr, but little disappointed to be honest.

Anybody has any first impression on this new lens?

Do you guys think that it's $1000 better than tamron lens?
I have the Tamron and am very happy with the IQ. I ran into a Pentax Pro who was shooting with the Pentax 70-200 and the K1. He owns Canon gear and has shot with Nikon too. According to him the Pentax is noticeably sharper than the Canon or Nikon offerings. I am not sure myself since I have not tried them side-by-side.

03-22-2016, 10:27 AM   #5
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Very interested in everyone's thoughts on these two lenses. The Pentax looks like an amazing lens in terms of IQ, but the difference in price is staggering. Plus, the weight of the Tamron is much easier to deal with.
03-22-2016, 10:33 AM   #6
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QuoteOriginally posted by sjyoon20904 Quote
Both copies in my hand.
Dfa 70 200 exhibits focus breathing quiet a bit. I meant a lot. Also, focusing speed feels little slower, too.
I'll be keeping my copy for better iq and wr, but little disappointed to be honest.

Anybody has any first impression on this new lens?

Do you guys think that it's $1000 better than tamron lens?
Didn't kenspo post that he found that the pre-production D FA* 70-200mm and D FA 150-450mm lenses both focus noticeably faster on the K-1 than K-3?
03-22-2016, 12:35 PM   #7
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QuoteOriginally posted by pete-tarmigan Quote
D FA* 70-200mm and D FA 150-450mm lenses both focus noticeably faster on the K-1 than K-3?
What on earth makes it focus faster on K-1? Is it the lens or the camera? Since lens is the constant here its the camera body that is lagging fast focus in case of K-3. In that case it isn't very meaningful to own a D-FA 70-200 F2.8 and use it on APS-C. Or Upgrade to K-1 if you want to make the most of it. Sounds like Pentax is pushing users one way or the other.
03-22-2016, 12:39 PM   #8
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QuoteOriginally posted by shardulm Quote
Sounds like Pentax is pushing users one way or the other.
just incremental improvements in technology over time, I think

03-22-2016, 12:59 PM   #9
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QuoteOriginally posted by shardulm Quote
What on earth makes it focus faster on K-1? Is it the lens or the camera? Since lens is the constant here its the camera body that is lagging fast focus in case of K-3. In that case it isn't very meaningful to own a D-FA 70-200 F2.8 and use it on APS-C. Or Upgrade to K-1 if you want to make the most of it. Sounds like Pentax is pushing users one way or the other.
If I remember correctly, Kenspo was referring to the speed at which the body's autofocus hardware and firmware could operate and communicate with the lens. I imagine the DC motor in the lens would be equally fast on the K-3 an K-1. If I could figure out how search Kenspo's posts for specific keywords I might try finding that post.
03-22-2016, 02:17 PM   #10
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QuoteOriginally posted by pete-tarmigan Quote
body's autofocus hardware and firmware could operate and communicate with the lens.
It might very well be true. Full frame sensor read outs need faster processor too and that possibly gives more horsepower to the focusing apparatus making it faster on K-1.
03-22-2016, 02:43 PM   #11
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QuoteOriginally posted by sjyoon20904 Quote
Dfa 70 200 exhibits focus breathing quiet a bit. I meant a lot.
Are you saying that the Tamron is free of focus breathing? Also, could you elaborate as to the focal lengths where you have observed this and whether it breathes "wide" or "long"?

QuoteOriginally posted by sjyoon20904 Quote
Also, focusing speed feels little slower, too.
What body are you using for your comparison?


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03-22-2016, 03:42 PM   #12
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Could you post some shots from both lenses under comparable conditions? Would be a great help for lots of people, I'm sure.
03-22-2016, 03:54 PM   #13
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QuoteOriginally posted by stevebrot Quote
Are you saying that the Tamron is free of focus breathing? Also, could you elaborate as to the focal lengths where you have observed this and whether it breathes "wide" or "long"?
I don't notice my Tamron breathing when focusing or zooming. It's an internally focusing system so something is moving but the overall length of the lens isn't changing.
03-22-2016, 03:59 PM   #14
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QuoteOriginally posted by 6BQ5 Quote
It's an internally focusing system so something is moving but the overall length of the lens isn't changing.
Focus breathing to "wide" at the wide end is a hallmark of internal focus zooms.


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03-22-2016, 04:00 PM   #15
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QuoteOriginally posted by 6BQ5 Quote
I don't notice my Tamron breathing when focusing or zooming. It's an internally focusing system so something is moving but the overall length of the lens isn't changing.
Ah grasshopper, focus breathing doesn't actually require the movement of air, it refers to the mouth of the lens (field of view) changing as focus is changed. So at 200mm the lens might have its mouth open as if it were only 180mm.
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