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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 23 Dec 2012 (Sunday) 20:04
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Which lens is better?

 
Sheldon100
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Dec 23, 2012 20:04 |  #1

I have a Canon 70-200mm F4 L and a Canon Extender EF 2X (series 1). My main focus is shooting birds from a distance. I would like to get the 2.8 version of that lens but can't afford it right now. I have also read that the 2.8 version might not improve my picture quality from the F4 I am using as the optics are supposed to be very good on my current lens. As an alternative I was considering getting the Sigma 70-200mm f/2.8 EX DG APO.
Do I stay with what I have or get the Sigma?




  
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EightEleven
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Dec 23, 2012 20:12 |  #2

Some tests the f4 is sharper than 2.8.. Daytime bird shots, f5 or smaller anyway. Save your money and get more reach. A lot of people like the sigma 150-500


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SiaoP
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Dec 23, 2012 20:18 |  #3

If you want the f/2.8 you get it because it can do f/2.8.

But here's a comparison of the f/2.8 (non IS) vs the f/4 (non IS) when both are put to f/4
http://www.the-digital-picture.com …omp=0&FLIComp=0​&APIComp=0 (external link)

They're nearly the same. Maybe the f/2.8 is slightly sharper at f/4.


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Dec 24, 2012 12:24 |  #4

Looks like the f/4 wins out slightly in the center, but the f/2.8 is slightly better in the mid-corner.

SiaoP wrote in post #15401456 (external link)
If you want the f/2.8 you get it because it can do f/2.8.

But here's a comparison of the f/2.8 (non IS) vs the f/4 (non IS) when both are put to f/4
http://www.the-digital-picture.com …omp=0&FLIComp=0​&APIComp=0 (external link)

They're nearly the same. Maybe the f/2.8 is slightly sharper at f/4.


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pdrober2
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Dec 24, 2012 13:29 |  #5

100-400 for birds, save you from messing with TCs


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TSchrief
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Dec 24, 2012 14:49 |  #6
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pdrober2 wrote in post #15403545 (external link)
100-400 for birds, save you from messing with TCs

The 100-400L is kinda pointless if you have a 70-200. Get the 400 f/5.6L instead. I got my 100-400L before acquiring a 70-200. Now, if I use the 100-400, it is generally at 400mm. At 400mm, the IS is next to useless handheld, and unnecessary on a tripod; don't let that be a determining factor. At 400mm, I need 1/500 to guarantee a decent shot, 1/400 starts to get iffy. At faster than 1/800, the IS doesn't matter, I shut it off.


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rick_reno
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Dec 24, 2012 14:54 |  #7

i found the f4 sharper than the 2.8's (i had 3 of them) i had. the 300 f4 is very sharp, as is the 400 f5.6




  
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RPCrowe
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Dec 24, 2012 18:22 as a reply to  @ rick_reno's post |  #8

My 70-200mm f/4L IS lens is so sharp that I have to be careful not to cut myself when I open the images shot with this lens;)

It does a decent job with a 1.4x TC with reasonable image quality and AF speed but, I have tried two different 2x tele extenders (1 Canon and 1 Kenko) and I was not satisfied with the IQ from either.

I have no experience with it but apparently, the 70-200mm f/2.8L IS ii lens and the 2x TC iii produces VG-excellent IQ.

OTOH: you can get a used 300mm f/4L IS and a 1.4x TC for a lot less than a 70-200mm f/2.8L IS ii lens and 2x TC iii. My 300mm f/4L IS lens wearing the 1.4x Canon Mk i TC provides VG IQ and AF speed...

A 400mm f/5.6 is also less expensive than thew 70-200mm f/2.8L IS ii and 2x TC iii combo but, doesn't have IS and the MFD is greater than the 300mm f/4L IS lens...


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Which lens is better?
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