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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 16 Apr 2012 (Monday) 14:05
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Is it pointless to buy a 1.4x teleconverter for 400mm f/5.6 lens?

 
1Tanker
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Apr 18, 2012 14:55 |  #31

hollis_f wrote in post #14287037 (external link)
It's obviously not easy, otherwise they wouldn't have dropped it for the 1Dx.

Do you think it's that, or an underhanded attempt at getting people to buy longer(more expensive) lenses? ;)


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gocolts
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Apr 18, 2012 15:02 |  #32

RPCrowe wrote in post #14286958 (external link)
really wish they would have included AF at f/8 in the 7D...

Agreed. I'd be first in line for the 7DII if such a feature is somehow implemented, however seeing that the full framers are going backwards on this, I'm not holding by breath.

From what I hear the birders are the ones who are most bothered by all this. First Canon takes away their 1.3 crop factor, then they take away AF & f/8...




  
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Apr 18, 2012 16:23 |  #33

gocolts wrote in post #14287910 (external link)
First Canon takes away their 1.3 crop factor, then they take away AF & f/8...

I think you'll find the 1D MkIV ticks both boxes.


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Apr 18, 2012 19:07 as a reply to  @ hollis_f's post |  #34

Most birders shoot with a 1.6 crop body anyway.


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gocolts
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Apr 19, 2012 06:51 |  #35

hollis_f wrote in post #14288422 (external link)
I think you'll find the 1D MkIV ticks both boxes.

Yes it does...I agree. The question is how much longer will the 1DMKIV be available?

I'm not a birder, but for shooting motorsports, I have to say a gently used 1d MKIV could be a very attractive solution for me once the price comes down some.




  
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Mike ­ Smith ­ 01
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Apr 29, 2012 06:08 |  #36

Let me first say that I am quite inexperienced regarding photography having bought my first DSLR last October. Anyway for what it is worth I have achieved what I consider to be some quite good results with the EF400 F5.6 + Kenko Pro 300 1.4 DGX teleconverter. I find the auto focusing to be both very fast and reliable with the outer focusing points but not the centre one. My camera is the 60D which has 9 focus points. Here is a link to my Flickr page with examples of the EF400/Kenko combination (any constructive criticism welcome) :- http://www.flickr.com/​photos/56936486@N08 (external link)

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Apr 29, 2012 08:32 |  #37

Mike Smith 01 wrote in post #14347076 (external link)
Let me first say that I am quite inexperienced regarding photography having bought my first DSLR last October. Anyway for what it is worth I have achieved what I consider to be some quite good results with the EF400 F5.6 + Kenko Pro 300 1.4 DGX teleconverter. I find the auto focusing to be both very fast and reliable with the outer focusing points but not the centre one. My camera is the 60D which has 9 focus points. Here is a link to my Flickr page with examples of the EF400/Kenko combination (any constructive criticism welcome) :- http://www.flickr.com/​photos/56936486@N08 (external link)

Mike Smith

Nice shots Mike, checked out your Flicker pages!


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Apr 29, 2012 09:16 |  #38

Like a lot of others are saying, I used my Kenko Pro300 DGX 1.4x on a 100-400 and still retained AF without having to tape any pins. I bought the TC as I'd read that it was designed to make f5.6 lenses retain AF and even report the FL and Aperture correctly in the EXIF. I've used it regularly on a 550D, 60D,7D, 5D2 and 5D3 with the 100-400 and retained AF on all of them whilst the IQ remains very good, there is a bit of degradation but not enough to not use it. I had a 2x MC7 and a 1.4x MC4 TC's previously and had problems with AF and bad IQ on both, so I was a little apprehensive when I went for the Pro300 but my fears are unfounded, this is a great quality TC and well worth adding to your kitbag.


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Apr 29, 2012 09:32 |  #39

I have the Tamron non-reporting 1.4 and have been satisfied with the autofocus it's achieved with the 100-400L on multiple crop bodies (20D and 40D) I have a 7D now and will try it on that. I don't know how the IQ compares to the other Tamron, Kenko, and Canon models, but do appreciate not having to cover pins.


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May 06, 2012 03:35 |  #40

just got 400 5.6. Tried it out along with kenko 1.4x on 7D. It works for all focus points given enough light; but outer eight points locks AF fast while center 11points only lock focus when there is maximum contrast.


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rick_reno
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May 06, 2012 11:00 |  #41

i tried my 1.4x on a friends 100-400, I'd describe the exercise as pointless.




  
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Swede ­ Kevin
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May 29, 2012 12:32 |  #42

I have both a 5DIII and a 400 mm f/5.6. I have considered buying a Kenko 1.4X to work with this combo. Are you saying that Canon's 1.4X III will also provide autofocusing with this combo? I already use Canon's 2X III with my 70-200mm IS II, with acceptable results.

N.V.M. wrote in post #14277375 (external link)
i have the Canon 1.4 III and the Canon 400mm f/5.6. here's my thoughts. IQ is slightly "degraded", no doubt, but its still very good, and its a grittier kind of quality. it's quite nice, actually.

i can't speak for the Kenko, but i always read/hear that the Canon 1.4x II is as good, and much cheaper than the version III i splurged on.

the upside is, that you get shots you wouldn't be able to get. AF is also not affected. couple of samples:

[IMAGE TOO SMALL, NOT RENDERED INLINE]

[IMAGE TOO SMALL, NOT RENDERED INLINE]

[IMAGE TOO SMALL, NOT RENDERED INLINE]




  
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Roy ­ C
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May 29, 2012 16:13 |  #43

Swede Kevin wrote in post #14500766 (external link)
I have both a 5DIII and a 400 mm f/5.6. I have considered buying a Kenko 1.4X to work with this combo. Are you saying that Canon's 1.4X III will also provide autofocusing with this combo?

No your combo will not AF with the Canon 1.4x III - NVM was using a 1 series camera which AF up to f8, your 5DIII only works up to f5.6.


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Roy ­ C
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May 29, 2012 16:19 |  #44

I am surprised no one has mentioned live view AF on the 7D - I have had AF up to f11 with no problems, obviously slower than normal phase AF but providing you have reasonable contrast it is very accurate. If you roughly manual focus to begin with AF is fairly quick. I often use a 400/5.6 + Canon 1.4x like this on the 7D, no need to tape any pins. I have also used a 20 year old teleplus tc with the 400/5.6 and that AF in live view as well.


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May 29, 2012 17:31 as a reply to  @ Roy C's post |  #45

IMAGE: http://farm9.staticflickr.com/8026/7271474726_462ed51226_b.jpg

shot with my 100-400L + 1.4x Kenko Pro3oo @ 560mm

Twin 1DX, 5D mk III - EF 16-35 f/2.8L II USM - EF 24-105 f/4L IS USM - EF 70-200 f/2.8 L IS USM II - EF 100-400 f/4.5 L IS USM - EF 100 f/2.8 L Macro IS USM - EF 85mm f/1.2 L II USM - Tam 24-70 f/2.8 Di VC - 580EXII - Einsteins & CyberSync System - Vagabond Mini -
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Is it pointless to buy a 1.4x teleconverter for 400mm f/5.6 lens?
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