Advise Upgrade 550D to 5DMkIII?

Started Aug 13, 2013 | Questions thread
Muresan Bogdan Contributing Member • Posts: 511
Re: Advise Upgrade 550D to 5DMkIII?

Mark my words wrote:


I own a Canon 550D, 15-85 EFS IS USM, 100-400 IS USM, set of 3 Kenco extension tubes & Yongnuo YN565EX Speedlite.

My main photo interest is wildlife although I do other stuff

I am thinking of upgrading to a Canon EOS 5DMk3 (and selling the 550D & 15-85 if I have to)

I only want to carry around 1 body and max 2 lenses - not as young as I used to be


For shots like this...

... will the 5D3 be significantly quicker at focusing and better at AL Servo tracking.

Yes, the 5d3 foucus system is almost as good as the 1DX and the second best in Canon's lineup.


Am I right in thinking that the 15-85 EFS will not work on the 5D3?

No it will not work.


I really like the 15-85 range on the 550D. If I have to lose it, will the 24mm-105mm L lense give me an equivalent range and quality?

The 24-105 will give you the exact same range and better image quality.


Finally, I have just discovered that the 100-400 (just about) works in full sun + flash with a 36mm extension tubes....

Will this combo work on the 5DMk3?

-- hide signature --


Normaly it should work but I am not sure of this one. Good luck.

 Muresan Bogdan's gear list:Muresan Bogdan's gear list
Canon EOS 5D Mark III Fujifilm X-T1 Canon EF 50mm f/1.4 USM Canon EF 85mm f/1.8 USM Canon EF 24-105mm f/4L IS USM +1 more
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