October 18, 2017, 10:52:46 AM

Author Topic: Results with the 100-400 with a 1.4x TC?  (Read 12431 times)

AlanF

  • Canon EF 400mm f/2.8L IS II
  • *********
  • Posts: 3043
Re: Results with the 100-400 with a 1.4x TC?
« Reply #15 on: October 25, 2013, 10:21:36 AM »
I moved to about twice the distance so the centre circle were only partly resolvable. These are 100% crops, but the pixels of the shot without TC were increased by 1.4x to give the same "resolution" as with the TC.  JUsge for yourself. Is it worth losing a stop and spoiling AF by adding the TC? (My lens is sharpest bare at f/11, similar to as found by SLRgear.
Top = bare lens x 1.4n using PhotoShop
Bottom = lens + 1.4xTC

OK. So basically upping the resolution in photoshop will result in almost a same image as using the TC  :(

Just out of curiosity AlanF, how does the center resolve with the 300mm f/2.8  + 2x TC? The 300mm  f/2.8 is what I plan to get next.

The 300mm f/2.8  II + 2x TC III is superb. Unless the subject is too close, I always use the x2 in preference to the 1.4. Everyone who has the combination in CR praises it. The version 1 lens is not as good, by all accounts. The focussing is also very snappy on the 5DIII, but not the 7D.

5D IV, 5DS R, 400mm DO II, 1.4xTC III, 2xTC III, EF 1.8 STM,  EF 24-105, 100-400 II, EF-S 15-85, Sigma 150-600mm C, EOS-M5 15-45, f/2 22, 11-22, Samyang 8mm f/2.8 fisheye: sold 7D II, EOS-M, Powershot G3 X,  Sigma 10-20, EF 300/2.8 II, 70-200/4 IS.

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Re: Results with the 100-400 with a 1.4x TC?
« Reply #15 on: October 25, 2013, 10:21:36 AM »

AlanF

  • Canon EF 400mm f/2.8L IS II
  • *********
  • Posts: 3043
Re: Results with the 100-400 with a 1.4x TC?
« Reply #16 on: October 25, 2013, 10:41:32 AM »
Maybe this helps. I don't know the quantitative analysis of data from FoCal. It spews out pdfs with images of the target on them plus a score. Here are crops from the pdfs plus scores from tests I did to find the sharpest aperture for the lenses on my 5DIII, all at the same distance. I have pasted in the image at the widest aperture and the sharpest (it is the same for the 600mm at f/5.6). Although the Focal score for the 300mm + 2xTC is lower than for the 300mm bare and + 1.4xTC, it gives the best image of small far away subjects because of its greater length.

Perhaps Neuro could comment?
5D IV, 5DS R, 400mm DO II, 1.4xTC III, 2xTC III, EF 1.8 STM,  EF 24-105, 100-400 II, EF-S 15-85, Sigma 150-600mm C, EOS-M5 15-45, f/2 22, 11-22, Samyang 8mm f/2.8 fisheye: sold 7D II, EOS-M, Powershot G3 X,  Sigma 10-20, EF 300/2.8 II, 70-200/4 IS.

Dylan777

  • Canon EF 600mm f/4L IS II
  • **********
  • Posts: 5452
Re: Results with the 100-400 with a 1.4x TC?
« Reply #17 on: October 25, 2013, 11:22:44 AM »
I moved to about twice the distance so the centre circle were only partly resolvable. These are 100% crops, but the pixels of the shot without TC were increased by 1.4x to give the same "resolution" as with the TC.  JUsge for yourself. Is it worth losing a stop and spoiling AF by adding the TC? (My lens is sharpest bare at f/11, similar to as found by SLRgear.
Top = bare lens x 1.4n using PhotoShop
Bottom = lens + 1.4xTC

OK. So basically upping the resolution in photoshop will result in almost a same image as using the TC  :(

Just out of curiosity AlanF, how does the center resolve with the 300mm f/2.8  + 2x TC? The 300mm  f/2.8 is what I plan to get next.

JR,
Should I pull trigger on this baby before you ;D

AlanF

  • Canon EF 400mm f/2.8L IS II
  • *********
  • Posts: 3043
Re: Results with the 100-400 with a 1.4x TC?
« Reply #18 on: October 25, 2013, 11:41:36 AM »
Oops, I screwed up in the earlier posting by having uploaded the 100-400 f/5.6 twice.
Hers it is with the extender to give 560mm f/8. These images have to be downloaded for comparisons.
The bottom is without the extender again.

5D IV, 5DS R, 400mm DO II, 1.4xTC III, 2xTC III, EF 1.8 STM,  EF 24-105, 100-400 II, EF-S 15-85, Sigma 150-600mm C, EOS-M5 15-45, f/2 22, 11-22, Samyang 8mm f/2.8 fisheye: sold 7D II, EOS-M, Powershot G3 X,  Sigma 10-20, EF 300/2.8 II, 70-200/4 IS.

docsmith

  • EOS 7D Mark II
  • *****
  • Posts: 550
Re: Results with the 100-400 with a 1.4x TC?
« Reply #19 on: October 25, 2013, 11:51:32 AM »
I played with the 1.4x TC on my 100-400L on the 5DIII in February before the 5DIII could AF.  My conclusion was that photos cropped in post had as much or more detail.  I was not impressed with this combination and sent the 1.4 TC back.  I've been using the 5DIII and the 100-400L together however, and they are a great pair.

BTW....I am another one looking at the 300 f/2.8....almost pulled the trigger last night...

J.R.

  • EOS-1D X Mark II
  • *******
  • Posts: 1741
Re: Results with the 100-400 with a 1.4x TC?
« Reply #20 on: October 25, 2013, 12:51:44 PM »
I moved to about twice the distance so the centre circle were only partly resolvable. These are 100% crops, but the pixels of the shot without TC were increased by 1.4x to give the same "resolution" as with the TC.  JUsge for yourself. Is it worth losing a stop and spoiling AF by adding the TC? (My lens is sharpest bare at f/11, similar to as found by SLRgear.
Top = bare lens x 1.4n using PhotoShop
Bottom = lens + 1.4xTC

OK. So basically upping the resolution in photoshop will result in almost a same image as using the TC  :(

Just out of curiosity AlanF, how does the center resolve with the 300mm f/2.8  + 2x TC? The 300mm  f/2.8 is what I plan to get next.

JR,
Should I pull trigger on this baby before you ;D

LOL ... Probably you will. Mine is scheduled for Feb / Mar.
1DX II; 600D
17L TSE; 35L II; 40 STM; 50L, 85L II; 100 Macro; 135L; 200L; 300L; 11-24L; 24-70L II; 100-400L II; 18-55;55-250

J.R.

  • EOS-1D X Mark II
  • *******
  • Posts: 1741
Re: Results with the 100-400 with a 1.4x TC?
« Reply #21 on: October 25, 2013, 12:55:08 PM »
I played with the 1.4x TC on my 100-400L on the 5DIII in February before the 5DIII could AF.  My conclusion was that photos cropped in post had as much or more detail.  I was not impressed with this combination and sent the 1.4 TC back.  I've been using the 5DIII and the 100-400L together however, and they are a great pair.

BTW....I am another one looking at the 300 f/2.8....almost pulled the trigger last night...

I'm keeping the 1.4x TC. for now, I'll probably be using it with the 70-200 II and, in a pinch, with the 135L.

Anyhow, the TCs will be essential once I get the 300f/2.8 II ... So no point returning it, I might get the 2x in the meantime  ;)
1DX II; 600D
17L TSE; 35L II; 40 STM; 50L, 85L II; 100 Macro; 135L; 200L; 300L; 11-24L; 24-70L II; 100-400L II; 18-55;55-250

canon rumors FORUM

Re: Results with the 100-400 with a 1.4x TC?
« Reply #21 on: October 25, 2013, 12:55:08 PM »

Skulker

  • EOS 6D Mark II
  • *****
  • Posts: 413
  • PP is no vice and as shot is no virtue
Re: Results with the 100-400 with a 1.4x TC?
« Reply #22 on: October 25, 2013, 02:03:20 PM »
I played with the 1.4x TC on my 100-400L on the 5DIII in February before the 5DIII could AF.  My conclusion was that photos cropped in post had as much or more detail.  I was not impressed with this combination and sent the 1.4 TC back.  I've been using the 5DIII and the 100-400L together however, and they are a great pair.

BTW....I am another one looking at the 300 f/2.8....almost pulled the trigger last night...

I'm keeping the 1.4x TC. for now, I'll probably be using it with the 70-200 II and, in a pinch, with the 135L.

Anyhow, the TCs will be essential once I get the 300f/2.8 II ... So no point returning it, I might get the 2x in the meantime  ;)

I have 878 images taken with the 100/400 + 1.4TC, so it gets some use but its not my top lens. Its quite capable but wont take the best images.

Now turning to the 300 f2.8  :) :) :) It works fine with the TC both 1.4 and 2. These will take the best images and are my top lenses.  :) :) :)
If you debate with a fool onlookers can find it VERY difficult to tell the difference.

canon rumors FORUM

Re: Results with the 100-400 with a 1.4x TC?
« Reply #22 on: October 25, 2013, 02:03:20 PM »