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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 06 Feb 2012 (Monday) 06:37
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Tamron 24-70 f/2.8 Di VC USD Announced!!! Stabilized 24-70!

 
shaftmaster
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May 05, 2012 00:33 |  #1441

davidc502 wrote in post #14378939 (external link)
the digitalpicture has done some vignetting tests on the new Tamron 24-70 VC. Looks like he has a really good copy because I'm not seeing much at all in his results.

http://thedigitalpictu​re.com …&CameraComp=0&F​LI=0&API=0 (external link)

I guess this proves without any doubt that the vignetting on the Tamron 24-70 VC is actually better than the Canon 24-70L mk1. That makes me feel much better about getting the Tamron 24-70 VC someday as an upgrade from my Tamron 28-75.

Perhaps the reason the initial reports made such a stink about vignetting is that the Tamron doesn't fall off as gradually as the Canon mk1, so the vignetting may seem more noticeable.


Paul

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Charlie
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May 05, 2012 01:02 |  #1442

AF test

IMAGE: http://farm9.staticflickr.com/8144/7144088443_40f9764151_b.jpg
IMAGE LINK: http://www.flickr.com/​photos/charlie617/7144​088443/  (external link)
5D2 AI Servo with tamron (external link) by charlie617 (external link), on Flickr

Might not be the best test since the 5D2 is kinda lame at AI Servo.

Sony A7riii/A9 - FE 12-24/4 - FE 24-240 - SY 24/2.8 - FE 28/2 - FE 35/2.8 - FE 50/1.8 - FE 85/1.8 - EF 135/1.8 Art - F 600/5.6 - CZ 100-300 - Astro Rok 14/2.8 - Tamron 17-28/2.8 - 28-75/2.8 RXD, 70-200/2.8 VC

  
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Charlie
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May 05, 2012 01:04 |  #1443

woos wrote in post #14382119 (external link)
This. lol.

The thing is...if there is an image where it's objectionable, you can solve the issue in seconds:

1. Open ACR/Lightroom
2. Make a brush. Set it to -10 clarity or -18 clarity (somewhere in there).
3. Set sharpness to negative as well, why not.
4. Paint on the objectionable bokeh onion.

Alternatively:
1. Turn down clarity on the whole image.
2. Paint it back onto the subject (this takes all of 15 seconds, it doesn't need to be exact at all).

brush sharpness to -40 or graduated filter is really easy and fast as well.


Sony A7riii/A9 - FE 12-24/4 - FE 24-240 - SY 24/2.8 - FE 28/2 - FE 35/2.8 - FE 50/1.8 - FE 85/1.8 - EF 135/1.8 Art - F 600/5.6 - CZ 100-300 - Astro Rok 14/2.8 - Tamron 17-28/2.8 - 28-75/2.8 RXD, 70-200/2.8 VC

  
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Legion5
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May 05, 2012 02:29 |  #1444

I thought I'd just mention that the-digital-picture.com has posted sharpness charts for the lens:

http://www.the-digital-picture.com …omp=0&FLIComp=0​&APIComp=0 (external link)

For those that don't want to do the comparisons here are the results vs the Canon 24-70mm
(better or worse means noticably so):

Focal Length - Center 10% - Middle 50% - Edge 90%

24mm - Slightly Better - Worse - Worse
35mm - Slightly Better - Worse - Worse
50mm - Equal - Somewhat Better - Worse
70mm - Worse - Worse - Worse

Overall it looks like the Tamron 24-70mm is noticably worse than the Canon 24-70mm in terms of overall image quality but scores slightly better center sharpness. It has particular issues at the corners overall but is actually somewhat better than the 24-70mm at 50mm.

The-Digital-Picture also experienced significant copy variation in the Tamron 24-70mm between their two copies, just something to watch for, it may be a fluke or a real issue.




  
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mafoo
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May 05, 2012 07:49 |  #1445

Legion5 wrote in post #14382436 (external link)
I thought I'd just mention that the-digital-picture.com has posted sharpness charts for the lens:

http://www.the-digital-picture.com …omp=0&FLIComp=0​&APIComp=0 (external link)

For those that don't want to do the comparisons here are the results vs the Canon 24-70mm
(better or worse means noticably so):

Focal Length - Center 10% - Middle 50% - Edge 90%

24mm - Slightly Better - Worse - Worse
35mm - Slightly Better - Worse - Worse
50mm - Equal - Somewhat Better - Worse
70mm - Worse - Worse - Worse

Overall it looks like the Tamron 24-70mm is noticably worse than the Canon 24-70mm in terms of overall image quality but scores slightly better center sharpness. It has particular issues at the corners overall but is actually somewhat better than the 24-70mm at 50mm.

The-Digital-Picture also experienced significant copy variation in the Tamron 24-70mm between their two copies, just something to watch for, it may be a fluke or a real issue.

Just to quantify this a bit....

This was tested on a tripod. Thus, Image Stabilization was not taken into account. The Optical quality of the glass is what was tested.

Hand holding these two lenses will result in different real world results.


-Jeremy
5D Mk II | SL1 | 24-105 f4.0L IS | 70-200 f2.8L IS | S35 1.4 | 40 2.8 Pancake | Samyang 14 2.8 | 430EX II

  
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RDKirk
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May 05, 2012 08:00 |  #1446

Legion5 wrote in post #14382436 (external link)
The-Digital-Picture also experienced significant copy variation in the Tamron 24-70mm between their two copies, just something to watch for, it may be a fluke or a real issue.

Of course, people always said that about the Canon lens, too.


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RDKirk
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May 05, 2012 08:02 |  #1447

mafoo wrote in post #14382937 (external link)
Just to quantify this a bit....

This was tested on a tripod. Thus, Image Stabilization was not taken into account. The Optical quality of the glass is what was tested.

Hand holding these two lenses will result in different real world results.

Choices abound. Die Welt ist schön.


TANSTAAFL--The Only Unbreakable Rule in Photography

  
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KHAWACHEN
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May 05, 2012 10:16 |  #1448

Final conclusion by thatnikonguy
http://www.youtube.com​/watch?v=3fC3IWsQ_Ms (external link)




  
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kevindar
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May 05, 2012 10:23 |  #1449

by the digital picture explanation, they are posting the better copy results. these results are very much in line with my old tamron 28-75. On a cropper, it was brilliant. one a full frame, compared to my 28-70 L, center sharpness was easily as good if not better wide open, but the corners fell apart, esp at the wide end (up until around 50mm). I would call the corners unacceptable, even at f11 at 24mm. any differences in center sharpness is well gone by f4, and they primarily exist on the wide end. this lens would be a no go for me. IS/vr is simply not that valuable on the focal range on a full frame.


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kevindar
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May 05, 2012 10:28 |  #1450

and yet another useful comparison on the digital picture is comparing it to the canon 24-105. its smaller and lighter, has better autofocus, 50% longer, and is optically better, and is 800 bucks brand from those selling it off of their kit, making tamron 50% more. it is one stop slower.


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Charlie
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May 05, 2012 10:48 |  #1451

mafoo wrote in post #14382937 (external link)
Just to quantify this a bit....

This was tested on a tripod. Thus, Image Stabilization was not taken into account. The Optical quality of the glass is what was tested.

Hand holding these two lenses will result in different real world results.

they're results certainly differ from my results, and look possibly different than another poster's result here.

Not disputing center sharpness @24mm, but corner performance
http://www.fredmiranda​.com …/topic/1110337/​1#10602358 (external link)

Center performance @ 70mm should also be better, with equal or slightly better corner performance
Center http://www.fredmiranda​.com …/topic/1110337/​2#10602731 (external link)
Center http://www.youtube.com …-2AnTmqo0&feature=g-all-u (external link)
Corner http://www.fredmiranda​.com …/topic/1110337/​2#10602546 (external link)

sunthing productions? http://img.photobucket​.com …314/Xcellere/co​mpare2.jpg (external link)

that said, I might have a less sharp 24-70L, along with sunthing productions

The center sharpness test should be easily duplicated on my test @70mm where it's disputed. I dont have the 24-70L anymore and cant do anymore tests, but @70, anyone using "FocAl" automatic MFA, can print out that chart on a laser printer and compare 100% crops against my tamron shot.


Sony A7riii/A9 - FE 12-24/4 - FE 24-240 - SY 24/2.8 - FE 28/2 - FE 35/2.8 - FE 50/1.8 - FE 85/1.8 - EF 135/1.8 Art - F 600/5.6 - CZ 100-300 - Astro Rok 14/2.8 - Tamron 17-28/2.8 - 28-75/2.8 RXD, 70-200/2.8 VC

  
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arentol
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May 05, 2012 14:53 |  #1452

Interesting read, possible reason why older 24-70Ls are doing worse than expected in the corners in real-world testing against the Tamron, and a VERY good reason not to bother with the current generation 24-70L when you can get better IQ + VC for less with the Tamron:

http://www.lensrentals​.com …0/the-limits-of-variation (external link)


5D3 | Rokinon 14 f/2.8 | 16-35L II | TS-E 24L | Tamron 24-70 f/2.8 | Tamron 28-75 f/2.8 | Voigtlander 40 f/2.0 | Σ 50 f/1.4 | MP-E 65 | 70-200 2.8L IS II | Σ 85 f/1.4 | Zeiss 100 f/2 | Σ 120-300 f/2.8 OS | 580 EX II | 430 EX II | Fuji X10 | OM-D E-M5 | http://www.mikehjphoto​.com/ (external link)
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cliffwang
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May 05, 2012 15:26 |  #1453

Charlie wrote in post #14383500 (external link)
that said, I might have a less sharp 24-70L, along with sunthing productions

The center sharpness test should be easily duplicated on my test @70mm where it's disputed. I dont have the 24-70L anymore and cant do anymore tests, but @70, anyone using "FocAl" automatic MFA, can print out that chart on a laser printer and compare 100% crops against my tamron shot.

I also have the same feeling. My Canon 24-70L is not as sharp as my Canon 17-55. Many photos from my 7D + 17-55mm are much sharper than the photo form my 5D2 + 24-70L. I sometimes feel the Canon 24-70 is not qualified for the RED ring.




  
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May 05, 2012 18:23 |  #1454

I used to not liking the 3rd party lens because of their quality built and optic wise. But now I have to agree that the 24-70 2.8 VC is building solidly like tank and excellent built of their optics compared to Canon 24-70L.


Bodies: 5D MkIII/ Oly ED-M5/ G10
Lenses: Tamron SP 24-70 2.8 Di VC /and some Panny and Oly lenses.
Flash: Canon600EX RT.

  
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Sunthing ­ Productions
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May 07, 2012 22:53 |  #1455

Just took some pics of my car earlier with the Tamron, these are SOOC + a crop:

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