June 24, 2018, 10:53:55 PM

Author Topic: 100-400mm: Canon vs Tamron vs Sigma  (Read 10123 times)

AlanF

  • Canon EF 400mm f/2.8L IS II
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Re: 100-400mm: Canon vs Tamron vs Sigma
« Reply #15 on: February 25, 2018, 12:57:37 PM »
Thank you for the sharing of your experience! Do you still have the Tamron 100-400? Did you try it also with 1.4x extender? I am trying to find out if it makes any sense or it's just better to crop.
Searching through the reviews of this lens it also seems to have quite a sample variance. The tendency shows that it is easier to find a sharp Sigma than a sharp Tamron considering the performance at 400 mm. Do you have the same experience?

I have been doing many comparisons of my Canon 100-400mm II (I have looked at 3 copies over the years) and my new Tamron 100-400mm, and looking at the records of the 5 copies of the Sigma 100-400mm I have tested.

On the 5DSR and 5DIV, the Canon has the best IS and is the most stable in the viewfinder, the Tamron next best, perhaps a stop worse in practice, and the Sigma the poorest. The AF of the Canon is the fastest, the Tamron next and the Sigma somewhat behind. The IQs are quite similar.

Matters are different on the M5. The Tamron really comes into its own and has at least equal IQ to the Canon at longer distances. The Sigma is hopeless and doesn't focus properly and gives blurred images - something I found early on with liveview but ignored. I have just been told on one of my exceedingly rare visits to Fred Miranda that it is known that some Sigma lenses are not compatible with liveview.

In a big surprise this evening, I found that at 1.6m close up, not only is the Tamron sharper than the Canon on both the 5DSR and M5, the image is 20% bigger in linear dimensions (the Canon is known to have severe focus breathing). At 19m, the Tamton's image is 4.6% larger. In practice, the magnification of the Canon at its MFD is no greater than the Tamron at its longer MFD because of the focus breathing.

I think the Tamron 100-400mm is by far the best long telephoto for the M5. It is light, balances very nicely, the focus speed is limited by the camera and so the faster AF of the Canon lenses is neutralised. The Tamron seems more sensitive to mirror slap on the 5DSR, and this doesn't affect the image from the M5.

It requires the dedicated Tamron extender and I haven't bought it - the Canon won't fit and the Sigma doesn't AF. By the way, I have done more BIF testing and the Canon 100-400mm II is in a different league, whatever Dustin writes. I aim at birds and not a running dog.
5D IV, 5DS R, 400mm DO II, 1.4xTC III, 2xTC III, EF 1.8 STM,  EF 24-105, 100-400 II, EF-S 15-85, Sigma 150-600mm C, EOS-M5 15-45, f/2 22, 11-22, Samyang 8mm f/2.8 fisheye: sold 7D II, EOS-M, Powershot G3 X,  Sigma 10-20, EF 300/2.8 II, 70-200/4 IS.

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Re: 100-400mm: Canon vs Tamron vs Sigma
« Reply #15 on: February 25, 2018, 12:57:37 PM »

exquisitor

  • EOS Rebel SL2
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  • Posts: 76
Re: 100-400mm: Canon vs Tamron vs Sigma
« Reply #16 on: February 26, 2018, 09:03:02 AM »
It requires the dedicated Tamron extender and I haven't bought it - the Canon won't fit and the Sigma doesn't AF. By the way, I have done more BIF testing and the Canon 100-400mm II is in a different league, whatever Dustin writes. I aim at birds and not a running dog.

I see... I had rather the Kenko extender in mind. It is compatible with virtually every EF lens and has a good optical quality. Have you used Sigma 100-400 with an extender? Can you recommend it?
As you indicated a good synergy with M5, I might as well get a M100 to use as an 1.6x extender.

I was also sceptical about Dustin's AF comparison with Canon 100-400. But for my usage (80% landscape + 20% some moving object like animals or people) Tamron would be definitely sufficient. Sigma has obviously more problems with AF, as you indicated and from different reviews. Better IS and AF is the reason I favour the Tamron, even if IQ is a bit worse than Sigma.

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Re: 100-400mm: Canon vs Tamron vs Sigma
« Reply #16 on: February 26, 2018, 09:03:02 AM »