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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 07 Aug 2015 (Friday) 17:32
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Teleconverter ...expectations too high??

 
DreDaze
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Aug 08, 2015 15:05 as a reply to  @ post 17661221 |  #16

in the meantime you could post a pic, to show people what you are dealing with...it's the only way one can tell you if your expectations are too high or not


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don1163
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Aug 08, 2015 15:25 |  #17

DreDaze wrote in post #17661230 (external link)
in the meantime you could post a pic, to show people what you are dealing with...it's the only way one can tell you if your expectations are too high or not

Can't use my computer as its in the bedroom and my wife's gone to bed...
But I will get some photos on here tomorrow so you can see what I'm worried about...


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ed ­ rader
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Aug 08, 2015 16:07 |  #18

teleconverters are a compromise. I don't like them or use them anymore. sure, in great light they work okay but usually not so much in the conditions I shoot


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Perfectly ­ Frank
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Aug 08, 2015 16:46 |  #19

I get reasonably good IQ from my 70-200 f2.8 IS II/1.4xIII combo. I have not done any MFA.
I usually don't use the pair since I have the 300 f2.8 IS II, which offers 20mm more reach and superb IQ.

Here's two from the 70-200/1.4x

IMAGE: https://flightlinephotos.smugmug.com/Photography/Canon-70-200-f28-and-14x-II/i-7zxw9qH/0/XL/Heron%40265mm-XL.jpg
IMAGE LINK: https://flightlinephot​os.smugmug.com …n%40265mm-XL.jpg&lb=1&s=A  (external link) on Smugmug


IMAGE: https://flightlinephotos.smugmug.com/Photography/Canon-70-200-f28-and-14x-II/i-pRHTm6J/0/X2/Encore%20Flight-X2.jpg
IMAGE LINK: https://flightlinephot​os.smugmug.com …%20Flight-X2.jpg&lb=1&s=A  (external link) on Smugmug

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patrol50
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Post edited over 4 years ago by patrol50. (3 edits in all)
     
Aug 08, 2015 20:31 |  #20

GeoKras1989 wrote in post #17660942 (external link)
Is that the fault of the 1.4x Mk 1, or the lens? Your post prompted me to take my new (to me) Kenko 1.4x DGX and 100-400L out in the yard. These are 100% crops: 6D, 100-400L, Kenko 1.4x DGX, f/8, 1/500, ISO 400. They are both hand-held, wide-open, and manually focused. I am happy with this level of performance. Is this good, or are my standards lower than most folks'?
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forum: Canon EF and EF-S Lenses


yep thats good imho - id be happy with that at a distance and at 560mm
cheers rob


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don1163
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Aug 09, 2015 05:20 |  #21

First image is with no lens correction and the second image is with +11 micro adjustment..
I shot at f5.6 for a narrow depth of field to show up any issues more clearly..
Light room default sharpening only..


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don1163
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Aug 09, 2015 05:30 |  #22

Rather heavily cropped...
First image no adjustment...
Second image +11..
Light room default sharpening only..


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don1163
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Aug 09, 2015 05:42 |  #23

Might show better in these crops...

Second image with +11 lens correction is clearly better..


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Aug 09, 2015 06:45 |  #24

I use my 1.4 MkIII teleconverter all the time with my 6d/ 70-200 MKII lens and there's very little difference in IQ and focus speed most of the time.I say most of the time because occasionally I do see what looks like a shot taken through too many pieces of glass.Make sure all your lenses are clean!!


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gonzogolf
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Aug 09, 2015 07:24 |  #25

It would help if your examples weren't so strongly backlit and high contrast. Aim it at something that has a full range of tones and detail across the frame. Test it under normal circumstances before you do extremes.




  
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Phoenixkh
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Aug 09, 2015 07:44 |  #26

I'm fairly pleased with the 7D2/100-400ii/1.4X III combo..... as long as I don't try to photograph a bird in the distance. I find those images a bit fuzzy........ but it could just be the high humidity affecting the shot.


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Aug 09, 2015 08:50 as a reply to  @ post 17660942 |  #27

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I think the first photo is sharper .



  
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Aug 09, 2015 11:50 |  #28

gonzogolf wrote in post #17661878 (external link)
It would help if your examples weren't so strongly backlit and high contrast. Aim it at something that has a full range of tones and detail across the frame. Test it under normal circumstances before you do extremes.

I would have thought a bird with sky as a background was quite a normal subject personally.. And I would hope that a bit of kit costing in excess of £300 would have the ability to cope with different situations....


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gonzogolf
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Aug 09, 2015 11:54 |  #29

don1163 wrote in post #17662154 (external link)
I would have thought a bird with sky as a background was quite a normal subject personally.. And I would hope that a bit of kit costing in excess of £300 would have the ability to cope with different situations....

It might be a normal subject for your shooting, but it's far from normal for evaluating lens performance. There is little or no detail across the frame. The bulk of the subject is in shadow and underexposed. Testing the lens should be done in reasonable light, with a subject that has fine detail. If it fails in good conditions then you know you have an issue separate from the difficult shooting conditions.




  
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don1163
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Aug 09, 2015 12:01 |  #30

Have printed out a proper test chart ,set everything up nice and straight and squaresquare and tested my lens...
70_200 on its own needed +5 adjustment and the lens and 1.4x combo needed +11 adjustment..
I have taken a couple of simple test shots indoors and the difference is very obvious even to my eyes..
Don't know how we managed before cameras with AFMA came along, if I had not been able to do adjustments I would not have used the 1.4x...now I am very happy with the image quality...
Thanks to everyone for their input..
Below are a couple of quick test shots (both cropped)


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Teleconverter ...expectations too high??
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