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Archive 2012 · 1.4x TC with the Canon 24-105 f4.0L?
  
 
EverLearning
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p.1 #1 · p.1 #1 · 1.4x TC with the Canon 24-105 f4.0L?


I know this is a very unusual question. I find the 24-105 to be a very nice vacation walk-about lens on my 7D. On occasion I wish I had more reach but definitely do not want to bring my 100-400 and do not have anything in between. I am considering a 300 2.8 or 120-300 2.8 for wildlife, in which case I would be buying a 1.4x TC. So I started to wonder if I would be able to take my 17-55 2.8, 24-105 4 and a 1.4x TC on a non-wildlife vacation and basically give me light yet very versatile kit fast on the low end but enough to cover up to 147 on the high end (235 full frame equivalent).

Thanks




Oct 20, 2012 at 11:45 PM
uz2work
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p.1 #2 · p.1 #2 · 1.4x TC with the Canon 24-105 f4.0L?


The Canon 1.4x (all versions) will not fit on any Canon lens shorter than the 135/2. The protruding front element of the Canon converters can only fit on a lens with a recessed rear element, and none of the Canon lenses shorter than the 135 have such a recessed rear element. Some of the third party converters will fit on shorter Canon lenses, but I have no experience to offer any thoughts on how well they work.

Les



Oct 21, 2012 at 12:05 AM
vsg28
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p.1 #3 · p.1 #3 · 1.4x TC with the Canon 24-105 f4.0L?


Consider the Kenko pro 300 DG/DGx which I just tried on the 24-105L for fun now. Surprisingly it not only fit very well, it also worked quite nicely. In decent light, I got good IQ with some increased CA. In poor light, AF hunt got worse as expected but I guess this works well for your needs.

I still can't figure out why my DG version is non-reporting despite no pins being taped, I can AF with this on my 70-200 IS II w/2x II and also the 100-400 L on my 7D fairly well in decent light.



Oct 21, 2012 at 12:14 AM
Gunzorro
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p.1 #4 · p.1 #4 · 1.4x TC with the Canon 24-105 f4.0L?


uz2work wrote:
The Canon 1.4x (all versions) will not fit on any Canon lens shorter than the 135/2. The protruding front element of the Canon converters can only fit on a lens with a recessed rear element, and none of the Canon lenses shorter than the 135 have such a recessed rear element. Some of the third party converters will fit on shorter Canon lenses, but I have no experience to offer any thoughts on how well they work.

Les


Sort of.

The converters will work on all the TS-E lenses (17, 24, 45 & 90), which are all under 135mm. Basically, if the lens has a recessed rear element, the teleconverters should work.



Oct 21, 2012 at 12:26 AM
EverLearning
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p.1 #5 · p.1 #5 · 1.4x TC with the Canon 24-105 f4.0L?


Thanks for the replies.

The TC(s) I get will be 100% driven by the 300mm I get and what is the optimal TC(s) for it. Any other uses of the 1.4x TC would be bonus only. So the Canon TC will not work with the 24-105. Most unfortunate.

Does anybody know if that is the same circumstance with the Sigma TCs? I suspect it is but would like to confirm.

Thanks



Oct 21, 2012 at 02:49 PM
Imagemaster
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p.1 #6 · p.1 #6 · 1.4x TC with the Canon 24-105 f4.0L?


Don,

Do not assume that Canon TC's are better than other brands. Kenko can be just as good or better.

I had a link somewhere showing that the Kenko DGX tested as sharper than a Canon.

The two shots below were taken with the 24-105 with and without the Kenko DGX 1.4x TC. The sun had not come up yet this morning, so note the slow shutter speeds. Handheld with IS on.






  Canon EOS 7D    105mm    f/8.0    1/125s    1600 ISO    0.0 EV  






  Canon EOS 7D    147mm    f/8.0    1/80s    1600 ISO    0.0 EV  




Oct 21, 2012 at 03:25 PM
EverLearning
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p.1 #7 · p.1 #7 · 1.4x TC with the Canon 24-105 f4.0L?


Thanks for the photos and additional comment Imagemaster. I will definitely keep this in mind.

One of the challenges I find out on the prairies is the limited selection at camera stores. It's not like l can walk into a store and try out the Canon 300 2.8, Sigma 120-300 and the Canon, Sigma and Kenko TCs. And they're reluctant to bring anything in because of the cost to them.



Oct 21, 2012 at 04:25 PM
Chris Tylko
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p.1 #8 · p.1 #8 · 1.4x TC with the Canon 24-105 f4.0L?


I've never really been satisfied with TC's largely because they rob me of so much light. Seeing as you seem to have a 40D, if you're not hankering to go full frame in the near future, why don't you look at the EF-S 18-200? Even at 5.6 on the long end that should be faster than the 24-105 with a TC. I've haven't (can't) try the 18-200 but I've read good things about it for use as a vacation lens.


Oct 21, 2012 at 04:40 PM
EverLearning
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p.1 #9 · p.1 #9 · 1.4x TC with the Canon 24-105 f4.0L?


Chris Tylko, I have a 7D, with the 40D being my backup body. I like the reach of the APS-C, so I'm not interested in Canon's FF offerings. I already own the 24-105 and like its IQ and weight/size for packing light. A 1.4 TC is small and < 5 ounces so it would have been a nice way to get a bit more reach with minimal space/weight added to the bag.


Oct 21, 2012 at 05:16 PM
Ian.Dobinson
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p.1 #10 · p.1 #10 · 1.4x TC with the Canon 24-105 f4.0L?


I've tried my 24-105 with a kenko 1.4x , and to be honest it's really not worth it. The gain is not that great over the reduction. In IQ. I found I could crop and resize (if I really needed to) and get a better result. Also that way your not loosing the stop .




Oct 21, 2012 at 05:24 PM
 

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tonywong88
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p.1 #11 · p.1 #11 · 1.4x TC with the Canon 24-105 f4.0L?


Where in the prairies are you? Are you close to Edmonton?

I've got a kenko 1.4 DGX and 120-300 OS if you are looking to try those. Also have the 1.4 III and 2.0 III Canons.

I loaned my DGX to a shipmate on an Antarctica photo expedition after he dropped his 100-400 and 5D2 into a stream. All he had was a 50D and 24-105 so the DGX seemed to be OK enough for him to get by after that.



Oct 21, 2012 at 05:51 PM
Imagemaster
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p.1 #12 · p.1 #12 · 1.4x TC with the Canon 24-105 f4.0L?


EverLearning wrote:
One of the challenges I find out on the prairies is the limited selection at camera stores. It's not like l can walk into a store and try out the Canon 300 2.8, Sigma 120-300 and the Canon, Sigma and Kenko TCs. And they're reluctant to bring anything in because of the cost to them.


Try here, I have rented a 500 f4 from them twice and the service is excellent:

http://www.lensrentalscanada.com/product_info.php?cPath=1_57_6&products_id=154&mcatPath=



Oct 21, 2012 at 07:03 PM
EverLearning
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p.1 #13 · p.1 #13 · 1.4x TC with the Canon 24-105 f4.0L?


Tonywong88, no offence, but not to many prairie folks would consider Edmonton to be the 'prairies'! I am from the Peg. It was very nice of you to offer my trying the combo though. Since you have the Kenko 1.4 and the 120-300 OS, as well as the 1.4 III and 2.0 III Canon TCs, I would be very interested on your thoughts of the IQ natively and with each of those three TCs.

Imagemaster, if I was pretty much locked in on one item and just wanted that final assurance, renting would be an option. But I really don't want to rent a Canon 300 2.8, Sigma 300 2.8, Sigma 120-300 2.8 and the Canon, Sigma and Kenko TCs! I may have to drive south of the border for a look-see.



Oct 21, 2012 at 08:08 PM
alexdi
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p.1 #14 · p.1 #14 · 1.4x TC with the Canon 24-105 f4.0L?


I couldn't resist trying this combination. I have a 24-105, a Kenko Pro DG 300 1.4X, and a 5D II.

24-105 @ 70mm + 1.4X, f/5.6 effective, 100mm effective:
https://dl.dropbox.com/u/163210/share/photo/24105_14x_70mm_f56.jpg

24-105 @ 70mm + 1.4X, f/11 effective, 100mm effective:
https://dl.dropbox.com/u/163210/share/photo/24105_14x_70mm_f11.jpg

24-105 @ 105mm, f/4:
https://dl.dropbox.com/u/163210/share/photo/24105_105mm_f4.jpg

24-105 @ 105mm, f/5.6:
https://dl.dropbox.com/u/163210/share/photo/24105_105mm_f56.jpg

AF performance was the same in daylight with or without the TC. It was slower indoors with the TC. The comparison shots were all manually focused.

Full-frame analysis:

Wide open, center performance hold ups with the TC. Sharpness falls off rapidly at the edges. Upsizing a file from the bare lens at f/5.6 would give better results for most of the frame. Stopped down to f/8 (f/11 effective), the TC gives a much stronger performance that you won't be able to match upsizing.

Crop analysis:

The TC holds up at all apertures, though I agree with the suggestion earlier for an 18-200 or 18-135.



Oct 21, 2012 at 08:46 PM
vsg28
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p.1 #15 · p.1 #15 · 1.4x TC with the Canon 24-105 f4.0L?


Alex, did your camera report f/5.6 with the Kenko Pro DG 300? Mine does not.


Oct 21, 2012 at 08:47 PM
alexdi
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p.1 #16 · p.1 #16 · 1.4x TC with the Canon 24-105 f4.0L?


No, it doesn't. I had to guess which were the TC shots by the exposure. It may report it with my 200/2.8L, I haven't tried. My 40D did.


Oct 21, 2012 at 08:52 PM
Ian.Dobinson
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p.1 #17 · p.1 #17 · 1.4x TC with the Canon 24-105 f4.0L?


vsg28 wrote:
Alex, did your camera report f/5.6 with the Kenko Pro DG 300? Mine does not.



It won't. The lens is not TC compliant , so lacks the 3 extra contacts. The way the TC announces itself to the camera is via the lens. If you look at the 2 mounts of a TC you will see the body end has the same amount of contacts as the body and non TC compliant lens, while the lens end has 3extra pins (assuming its a reporting TC)



Oct 21, 2012 at 08:52 PM
vsg28
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p.1 #18 · p.1 #18 · 1.4x TC with the Canon 24-105 f4.0L?


But why does it not report with any of my lenses, even my 2 white telephotos?


Oct 21, 2012 at 09:47 PM
Ian.Dobinson
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p.1 #19 · p.1 #19 · 1.4x TC with the Canon 24-105 f4.0L?


vsg28 wrote:
But why does it not report with any of my lenses, even my 2 white telephotos?



How many pins does it have on the lens mount end?



Oct 21, 2012 at 09:59 PM
tonywong88
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p.1 #20 · p.1 #20 · 1.4x TC with the Canon 24-105 f4.0L?


Heh, it's not covered in lakes of oil over here.
http://en.wikipedia.org/wiki/Canadian_Prairies

As far as I've known, most Albertans considered themselves to be in the Canadian prairies. Those that didn't want to separate from Canada anyhow.

The 1.4 TCs are pretty close in performance with a slight edge going to the Canon, but the Kenko is more compatible with a variety of lenses because the Canons have a protruding element (and rubber surround) that can interfere with some lenses. Also the Canon is weather sealed and feels way more sturdy.

The 2.0 III TC is pretty good but the hit in AF speed and 2-stop loss means I only use it if I have no other options.

Put up a quick test (sorry about the crooked horizontal plane) but I hope it helps. Lighting sucks too

7D, Live view, contrast AF, 10 second timer, AV, ISO 200, on a gimbal/tripod with OS off. All RAW files. 120-300mm OS with Kenko and Canon TCs. Chart is about 15' away.

Dropbox link



Oct 21, 2012 at 10:07 PM





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