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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 11 Nov 2010 (Thursday) 23:26
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Evaluating the IQ between a Tamron 28-75 versus a Canon 24-70

 
Gomboman
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Nov 11, 2010 23:26 |  #1

I've owned a Tamron 28-75 for about 6 months or so. I just purchased a 24-70 a few days ago and will probably sell the Tamron. Before I sell the Tamron I want to evaluate or compare the IQ between these two lenses. I own a 1D Mark IIN by the way.

So far, I've taken a few comparison shots at different focal distances and apertures inside the house since it's been dark by the time I get home from work now. I've shot bowls of fruit, people, calendars etc. It's very difficult to distinguish which lens is actually better. Both are very similar but the 24-70 seems to be a little sharper towards the edges of the images. The colors also seem a little better with the 24-70 but it's very subjective shooting these types of images.

This weekend I want to take some comparison shots between the two lenses outdoors in real conditions. I'm not sure the best way to go about this. Does anyone have any reccomendations for me? Any helpful advise would be appreciated.


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Jamesino
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Nov 11, 2010 23:38 |  #2

I own the Tamron 28-75 and have rented the Canon 24-70 on a few okkasions and I have a hard time telling the difference between the two when doing portraits.




  
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afviper
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Nov 11, 2010 23:46 |  #3

I am sure the Canon has advantages over the Tamron but i doubt that sharpness is one unless you like peeping pixels.


30D, 300D, Tokina 12-24mm, Tamron 28-75mm f2.8, 50mm f1.8, 100mm F2.0, Sigma 70-300mm APO macro, Tokina 400mm F5.6, CZ Jenna 135mm f3.5, 18-55mm,

  
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Mac
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Nov 12, 2010 09:22 |  #4

I have the Tamron and have borrowed the Canon from a friend. IQ wise, they are extremely close. The big difference (and it is not THAT big) I found was the Canon was a little more saturated over my Tamron. Focus is slightly faster, and I do love the full time manual focus of the Canon. But I like the weight of the Tamron...:)


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Shockey
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Nov 12, 2010 09:23 |  #5

F4 and above you won't see much difference.
At 2.8 you should definitely see some difference.


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davidfig
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Nov 12, 2010 10:08 |  #6

I have owned both. So here's my two cents.

Canon
1. Has very good edge to edge sharpness
2. beautiful colors and bokeh
3. Nice design with the zoom going inward for the hood
4. overly distorted on the wide end for my taste.

Tamron
1. A full pound lighter
2. has good edge to edge sharpness
3. Colors and bokeh pretty good also
4. hood not so good

For me the Canon was a heft lens to carry around, the hood was so large that there were times when I might not take it. I've become more selective in my L fever.

I still think its a preference thing. I like the tamron and can live with the zoom ring going the other way. But the savings is weight is more important to me. I still get fantabulous shots.


5D | 17-40L | Tammy 28-75 2.8 | 28-135 | 50/1.8 | 85/1.8 | Sony A6000 2-Lens Kit | SEL35 1.8 | EF 50 1.8 on NEX as my 75mm 1.8

  
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bohdank
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Nov 12, 2010 12:22 |  #7

I own the Tamron...I think it was my second lens, after the 70-200 F4IS.

I have acquired and used a number of very good to stellar lenses since then. I still have the Tamron. Everything I have seen, comparisons, etc. between it and he Canon suggest it is 6 of one and a half dozen of the other as far as IQ.

I don't need faster focusing in this range of zoom, nor any "build" differences...my Tamron has served me just fine. So, considering the weight (my bag is more than heavy already) and the price difference, I have never been tempted to get the Canon. I don't expect anything will replace it anytime soon.


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jdang307
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Nov 12, 2010 14:28 |  #8

How is the AF on the Tamron? Fast and silent?




  
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bohdank
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Nov 12, 2010 15:29 |  #9

Fast is a relative word. I shoot concerts in AI Servo and it works for me. A running dog, towards/away from you. I doubt it would be fast enough

It's not silent but why are people so concerned about this. Do you shoot at funerals, in churches, 5 feet from your subject ? Other than the shooter, no one is going to hear it in typical conditions. I would be more concerned about shutter/mirror noise.

Oh, and I have used it in churches and nobody notices.


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jdang307
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Nov 13, 2010 01:43 |  #10

I have a 35/2 so I'm not averse. But if given the choice, I like the way my 135L focuses, compared to the 35/2. So I ask.




  
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K6AZ
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Nov 13, 2010 02:02 |  #11

Jamesino wrote in post #11269577 (external link)
I own the Tamron 28-75 and have rented the Canon 24-70 on a few okkasions and I have a hard time telling the difference between the two when doing portraits.

Really?

I recently thought about buying one to dedicate to my film bodies since I've heard some good things about it. I looked at five different copies being offered here and on FM. In every case the images were very soft from f/2.8 to f/4 which totally defeats the purpose of buying one.


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phreeky
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Nov 13, 2010 06:33 |  #12

My Tamron is stunning from 35mm or so and up, wide open, though I shoot on a crop body so the edges might not be great on FF. At 28mm I do see quite a bit of CA wide open, but just stopping down to F/3.2 fixes it reasonably well.

I love the hood/zoom design of the 24-70, but it's heavy and expensive without much of an IQ advantage so not for me.




  
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argyle
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Nov 13, 2010 06:49 as a reply to  @ phreeky's post |  #13

Tried the Tamron for a bit. My feeling is that is was just 'okay'...nothing about it blew me away. My copy also suffered from zoom creep, where I always had to keep the zoom locked to prevent it from moving. Sold it and switched to the 24-70L. Its a bit heavier, but in my estimation, its that much better of a lens...colors, contrast, bokeh, USM. I also do a lot of outdoor landscape shooting, and the 77mm filter size is consistent with the majority of my other lenses...means less filters to carry around (and no step rings).


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pasm365
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Nov 13, 2010 08:40 as a reply to  @ argyle's post |  #14

Not sure if your camera has AF fine tune feature. If so, I'd suggest adjust focusing accuracy first before doing the comparison. Most online lens reviews haven't take focus accuracy into account, and their findings can be very misleading due to sample variations.

I'd expect 24-70 to be a more consistant performer than 28-75. I handled one before. 28-75 is about as cheap as a f/2.8 lens can be, so is the quality. Nice but nothing worth writing home about.


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SexyRed
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Jan 10, 2011 12:18 |  #15

This thread is great, great alternate to L on a budget.




  
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Evaluating the IQ between a Tamron 28-75 versus a Canon 24-70
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