Can someone recommend a teleconverter?

HughHowey

EOS 80D
Mar 29, 2011
102
0
44
Boone, NC
www.hughhowey.com
I'm looking at either the 1.4X III or the 2X III from Canon. I'll be using them on a 5DIII primarily with a 70-200 2.8 II. It's for the times I'm shooting wildlife, which isn't often, but I do have a trip coming up in December.

How mushy are pics with the 2X? Is the little extra reach on the 1.4 worth adding? Or am I just as well off to crop a sharp image?

Thanks in advance.
 
Mar 14, 2012
2,329
207
The 1.4x affects IQ almost imperceptibly in real photos, but the 2x is discernable at 100%. In both cases, it's better than cropping, but the 2x definitely affects IQ more. With either, you have to re-AFMA with the extender(s) installed. Even with 2x, the photos should be fine at normal sizes if you don't crop it too much.

From what I've read, the 70-200 II with a 2x is nearly a match for the 100-400 (I've used the 70-200 with 1.4 and 2x but not the 100-400). If true, you don't really have another way of getting to 400mm without jumping to much more expensive primes.
 

neuroanatomist

I post too Much on Here!!
Jul 21, 2010
24,635
2,142
HughHowey said:
How mushy are pics with the 2X?
Depends on the lens. With the 70-200 II, they're not mushy at all. (Click through and View All Sizes for a 1600 pixel version).


EOS 7D, EF 70-200mm f/2.8L II IS USM + EF 2x II Extender @ 400mm, 1/160 s, f/5.6, ISO 3200


EOS 5D Mark II, EF 70-200mm f/2.8L II IS USM + EF 2x II Extender @ 260mm, 1/250 s, f/5.6, ISO 400

The crane was in an enclosure, so I was shooting through wire.

The above are with the 2xII, but the 2xIII isn't really much different optically (AF is better). I'd get the 2xIII in your position...
 

yablonsky

EOS T7i
Nov 14, 2012
50
0
I would prefer cropping.

With my 5D II I found the resolution is sufficient for cropping. I used the Canon 1,4x, a Kenko 1,4x and a Kenko 2,0x with the 70-200 4L IS and the 300 4L IS. I didn't like all of them. The 1,4x TCs are better IQ wise, but the 1.4x ratio is poor. The images are hazy. Contrast is missing.

The dragon fly is a 1920 x 1200 crop. 5D II + 300 4L IS.
 

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neuroanatomist

I post too Much on Here!!
Jul 21, 2010
24,635
2,142
HughHowey said:
I'm looking at either the 1.4X III or the 2X III from Canon. I'll be using them on a 5DIII primarily with a 70-200 2.8 II.
As you look at the examples, keep in mind that the lens the TC is used with plays a big role. Put a 2xIII on a 70-200/2.8 MkI (the worst of the three 70-200/2.8's), you get mush. Put it on a 300/2.8L IS II, you'll have better IQ than many bare lenses.