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CANON 100-400 LENS

FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses
Thread started 02 Oct 2008 (Thursday) 21:23   
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jdcbgc
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I'm considering buying a canon 1.4 teleconverter for the 100-400 canon lens. Some say it won't work on this lens. Others say it will but you woun't have automatic focus. Which is true? If some of you have this combination I would like to hear what you think of it.

Post #1, Oct 02, 2008 21:23:17




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Headshotzx
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jdcbgc wrote in post #6427120external link
I'm considering buying a canon 1.4 teleconverter for the 100-400 canon lens. Some say it won't work on this lens. Others say it will but you woun't have automatic focus. Which is true? If some of you have this combination I would like to hear what you think of it.

Fact #1: It will be mountable
Fact #2: Autofocus will not work on non-1D or professional film bodies
Fact #3: Autofocus can be tricked into working slowly by taping up the pins.
Fact #4: Image quality will not be that good, considering that 400mm on the lens isn't very good (subjective, ymmv) already.

Post #2, Oct 02, 2008 22:53:47


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ed ­ rader
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jdcbgc wrote in post #6427120external link
I'm considering buying a canon 1.4 teleconverter for the 100-400 canon lens. Some say it won't work on this lens. Others say it will but you woun't have automatic focus. Which is true?If some of you have this combination I would like to hear what you think of it.

i have the lens and the 1d mark III. i don't use it with TC because the IQ isn't to my standards.

ed rader

Post #3, Oct 02, 2008 22:57:40


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5D3, SL1, 16-35L f4 IS, 24-70L II, 70-300L, 100-400L, 35f2 IS, 24mm f2.8 ef-s, 15mm FE (sigma), 270ex II, gitzo, markins, benro

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weka2000
Is that a 300mm in your pocket?
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Headshotzx wrote in post #6427612external link
Fact #3: Autofocus can be tricked into working slowly by taping up the pins.

If you use fact #3 remember it can burn out the motor due to the strain of trying to focus.

Post #4, Oct 03, 2008 00:10:35


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S_Egbert
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I have this lens and use it with a Kenko 1.4 converter. With the pins taped it will focus quite well in good light. If it struggles I go to manual focus.
I chose the Kenko because it will fit many more lenses than the Canon due to Canon's protruding element on the front side.

Steve

Post #5, Oct 03, 2008 04:47:46


Steve

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jsinon
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I get excellent results at 400 with mine, my standards must be too low. I've also seen som e really nice pics posted here taken with a 1.4 added. I personally am thinking of getting one but will stick with manual focus.

Post #6, Oct 03, 2008 04:49:43


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johnz
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I have the 1.5x TC from Kenko, the center focus point does not work but other do, but they require a lot of light and contrast.

Here's a few sample moon shot, same amount of sharpening in all of them.

100-400L @ 390mm NO TC

IMAGE NOT FOUND IMAGE IS A REDIRECT OR MISSING!
http://galleria.kusti.​info ...ormal_moon_no_tc_cr​op.jpgexternal link
HTTP response: 404 | MIME changed to 'text/html' | Byte size: ZERO


100-400L @ 400mm with 1.5X TC
I think this sample proves that you can get more detail in your image with a tc, even though it does make the image softer.
IMAGE NOT FOUND IMAGE IS A REDIRECT OR MISSING!
http://galleria.kusti.​info ...1/normal_moon_tc_cr​op.jpgexternal link
HTTP response: 404 | MIME changed to 'text/html' | Byte size: ZERO


And this is the Field of view difference with and without a tc.
IMAGE NOT FOUND IMAGE IS A REDIRECT OR MISSING!
http://galleria.kusti.​info ...ics/10001/FieldOfVi​ew.jpgexternal link
HTTP response: 404 | MIME changed to 'text/html' | Byte size: ZERO

Post #7, Oct 03, 2008 05:13:34


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jdcbgc
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Thanks, I think I could live with the manual focus. Still not sure about the image quality. I like a pretty sharp picture also. If any one would care to post some more pictures with this combination I would like to see them.

Post #8, Oct 03, 2008 08:11:10




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rdricks
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I use the combination sometimes. I don't mind the manual focus. But there is definitely image degradation. If I really need the length I add it, but only if I need that extra length.

Here is a shot with the combination. It is allright, but if you look closely it is not as sharp as it could be, definitely not as sharp as it would have been without the converter.

IMAGE: http://farm4.static.flickr.com/3146/2466069678_53603186c7.jpg

Post #9, Oct 03, 2008 08:28:45 as a reply to jdcbgc's post 17 minutes earlier.


-Ryan
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Heffe
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Connecticut USA
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Mr UPS is on the way with one to my door today. I will take some pics today and see how it goes.

Post #10, Oct 03, 2008 08:30:59


Jeff*
40D, 100 f2.8 Macro, 17-40 f4L, 100-400 4.5-5.6L IS
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liquidstone
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Headshotzx wrote in post #6427612external link
Fact #4: Image quality will not be that good, considering that 400mm on the lens isn't very good (subjective, ymmv) already.

"considering that 400mm on the lens isn't very good (subjective, ymmv) already."


This was taken with a 1DM2 + 100-400 at 400 mm, wide open and hand held. I've printed it to 20"x30" for a museum exhibit, and feather detail is still very good when seen from 10 inches away. I won't hesitate to print it to 24"x36" if necessary.

Processed 100% crop (EXIF intact):

IMAGE: http://www.pbase.com/liquidstone/image/94096865/original.jpg




Here's the 20"x30" print on the museum wall (the smaller ones are 12"x15"):

IMAGE NOT FOUND IMAGE IS A REDIRECT OR MISSING!
http://farm4.static.fl​ickr.com ...09932022_c1e703166b​_o.jpgexternal link
HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR




For a sense of scale, here are other 12"x15" photos being mounted in the same museum exhibit:

IMAGE: http://farm4.static.flickr.com/3270/2823721875_679a949554.jpg

Post #11, Oct 03, 2008 09:17:40


Romy Ocon, Philippine Wild Birdsexternal link
Over 260 species captured in habitat, and counting.

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