October 26, 2014, 04:03:45 AM

Author Topic: DxO Review of the Tamron 150-600mm f5-6.3 Di VC USD Canon  (Read 3053 times)

Albi86

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Re: DxO Review of the Tamron 150-600mm f5-6.3 Di VC USD Canon
« Reply #15 on: February 12, 2014, 04:28:43 PM »
Thanks for the link, lycan. Impressive series of pictures, even those at 600mm wide open.

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Re: DxO Review of the Tamron 150-600mm f5-6.3 Di VC USD Canon
« Reply #15 on: February 12, 2014, 04:28:43 PM »

scottburgess

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Re: DxO Review of the Tamron 150-600mm f5-6.3 Di VC USD Canon
« Reply #16 on: February 12, 2014, 04:32:48 PM »
As usual, the rating is one dimensional.  Too bad they don't have some photographers rating the lenses for ALL the reasonably important things to photographers.  They seem to stick to sharpness and a couple of other parameters.  We don't even know if it will autofocus,  from their reviews, it could be a manual focus only lens.

To add to this point for the benefit of the original inquirer one has to ask what the variance is as well, as was pointed out by Roger Cicala a couple years back: http://www.lensrentals.com/blog/2012/01/the-great-50mm-shootout.  As illustrated in the article, the only clear winner was one of the Zeiss lenses and the other "differences" in single numbers given were mostly swamped by variance (though the other Zeiss appeared to average a tad worse than all other lenses).

I do enjoy posts by the lensrentals kin--they seem to accept lens tests as a potentially useful tool, but recognize that what matters are the needs of the photographers.  They test multiple units when reporting about lenses.  They do their best to provide helpful tips and dispel misconceptions.  They willingly share their methodology.  And unlike DxO they don't take themselves and their (queue Boris and Natasha) "zeekret methodz" so ridiculously seriously.  Sometimes a little humility goes a long way.

And speaking of that good humor of theirs, Happy Valentines, everyone!  http://www.lensrentals.com/blog/2014/02/we-love-lenses.




AlanF

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Re: DxO Review of the Tamron 150-600mm f5-6.3 Di VC USD Canon
« Reply #17 on: February 12, 2014, 04:44:47 PM »
The point about variance is well taken. However, Lensrentals actually analysed two copies each of the Tammy and the 100-400.

http://www.lensrentals.com/blog/2014/01/tamron-150-600-telezoom-shootout

They found identical MTFs for the Tammy and Canon at 400mm and f/5.6. It's clear that they are close to being indistinguishable from more than one different testers.

5D III, 70D, Powershot SX50, 300/2.8 II, 1.4xTC III, 2xTC III, 70-200/4 IS, 24-105, 15-85, Sigma 10-20, Tamron 150-600.

scottburgess

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Re: DxO Review of the Tamron 150-600mm f5-6.3 Di VC USD Canon
« Reply #18 on: February 12, 2014, 04:53:41 PM »
The point about variance is well taken. However, Lensrentals actually analysed two copies each of the Tammy and the 100-400.

Ahh!  Thanks, Alan, I didn't even think to look for comparison tests there when writing the post.

lescrane

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Re: DxO Review of the Tamron 150-600mm f5-6.3 Di VC USD Canon
« Reply #19 on: February 12, 2014, 04:58:24 PM »
The point about variance is well taken. However, Lensrentals actually analysed two copies each of the Tammy and the 100-400.

http://www.lensrentals.com/blog/2014/01/tamron-150-600-telezoom-shootout

They found identical MTFs for the Tammy and Canon at 400mm and f/5.6. It's clear that they are close to being indistinguishable from more than one different testers.

agreed. we've had a few 'objective' tests now and there seems to be a consensus that the differences between  these lenses, within their respective ranges is miniscule. 

The Dxo summary says that if you already have the Canon 100-400L, don't go out and buy the Tamron if you are looking for an improvement in IQ.  you won't find it.  But you will find more range, and if you are getting into this range for the first time, a lower price.

There are also a lot of other considerations like focusing and handling.  I have had some issues wthe Tamron focusing that were due to some custom settings I had wrong.  Still, it can be challenging to focus moving subjects in some conditions.  However, the 100-400 L I once owned was not exactly stellar either.  In fact, I had to return it twice to Canon for problem with the focusing motor.  It didn't cost me $$ but it was a p.i.a.    I don't know how the Tamron will hold up, but I think a 6 year warranty is worth some peace of mind.   Years ago, lens warranties were meaningless. Then they added autofocus, IS, etc and you have electro-mechanical issues that will crop up(no pun intended).


Mt Spokane Photography

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Re: DxO Review of the Tamron 150-600mm f5-6.3 Di VC USD Canon
« Reply #20 on: February 14, 2014, 12:02:43 AM »


Now please some of the detractors, design a lab-based BIF test. Of course the lab must be as big as a forest to be realistic, but with tightly-controlled lighting conditions everywhere. Oh, and it has to be reproducible of course, so you'd better think of how to convince the bird to keep flying back and forth the same path and at the same speed over and over again.
They can measure AF speed, tracking ability, and if it works with live view, all in a lab. 
I've run a lab that produced reports for NASA, and they are tough to please.  We used Standardized approved test methods though.  DXO invents their own that no one else uses. 

woodenshoe

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This test is very timely for me, as I have just received my copy of this lens, and I am about to leave on a trip that will include photographing wildlife.  I am lucky enough to own both a 7D and a 5D III.  I assumed I would bring the 7D to use with this lens, but the tests seem to show that would be the wrong choice.

For this question, assume the lens is at 600mm and f8, and the subject would nicely fill the frame (no additional cropping in post) on the 7D.  Do these tests show that if I used the 5D III instead, and then cropped the image to be the same size as from the 7D, that the 5D III image would have more resolution and better detail?

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AlanF

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This test is very timely for me, as I have just received my copy of this lens, and I am about to leave on a trip that will include photographing wildlife.  I am lucky enough to own both a 7D and a 5D III.  I assumed I would bring the 7D to use with this lens, but the tests seem to show that would be the wrong choice.

For this question, assume the lens is at 600mm and f8, and the subject would nicely fill the frame (no additional cropping in post) on the 7D.  Do these tests show that if I used the 5D III instead, and then cropped the image to be the same size as from the 7D, that the 5D III image would have more resolution and better detail?

I have the 5DIII and 70D, having sold the 7D, and have experience of the Tamron on the 5DIII and 70D. My decision is to use the 5DIII - it works very well with the Tamron in terms of AF and image quality. Even with the sharper 300mm/2.8 II + 2xTC III, the 5DIII in general, but not always, outperformed the 7D and the 5DIII AF is just so much better in consistency.
5D III, 70D, Powershot SX50, 300/2.8 II, 1.4xTC III, 2xTC III, 70-200/4 IS, 24-105, 15-85, Sigma 10-20, Tamron 150-600.

AlanF

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Re: DxO Review of the Tamron 150-600mm f5-6.3 Di VC USD Canon
« Reply #23 on: February 17, 2014, 03:22:24 PM »
I did one test: the brick wall! Trinity College's Tudor brick chimney. The 70D and the 5DIII were on a tripod for this test, both at f/8 and 600mm with the Tamron. From top to bottom; 70D scaled down to 1200x800; 5DIII scaled down to 1200x800; 100% crop from centre of the full-sized 70D; very bottom, the centre from the full-sized 5DIII upscaled by 1.5x. If you crop the centre 200x200 the 70D is slightly better, but the image is too small anyway to be of any use.

Both lenses were AFMAd 3xtimes, Dilbert.

I think the 5DIII image is better. But, it's only one example under one set of conditions.
« Last Edit: February 17, 2014, 03:50:06 PM by AlanF »
5D III, 70D, Powershot SX50, 300/2.8 II, 1.4xTC III, 2xTC III, 70-200/4 IS, 24-105, 15-85, Sigma 10-20, Tamron 150-600.

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Re: DxO Review of the Tamron 150-600mm f5-6.3 Di VC USD Canon
« Reply #23 on: February 17, 2014, 03:22:24 PM »