October 23, 2014, 05:00:49 AM

Author Topic: Results with the 100-400 with a 1.4x TC?  (Read 4346 times)

AlanF

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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 »
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 III, 70D, Powershot SX50, 300/2.8 II, 1.4xTC III, 2xTC III, 70-200/4 IS, 24-105, 15-85, Sigma 10-20, Tamron 150-600.

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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

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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 III, 70D, Powershot SX50, 300/2.8 II, 1.4xTC III, 2xTC III, 70-200/4 IS, 24-105, 15-85, Sigma 10-20, Tamron 150-600.

Dylan777

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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
Body: 1DX -- 5D III
Zoom: 16-35L f4 IS -- 24-70L II -- 70-200L f2.8 IS II
Prime: 40mm -- 85L II -- 135L -- 200L f2 IS -- 400L f2.8 IS II

AlanF

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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 III, 70D, Powershot SX50, 300/2.8 II, 1.4xTC III, 2xTC III, 70-200/4 IS, 24-105, 15-85, Sigma 10-20, Tamron 150-600.

docsmith

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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.

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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.
5D3, 6D, 600D, RX100
16-35L, 24-70L II, 70-200L II, 100-400L, 50L, 85L II, 135L, 24TSE, 40, 100 macro, 18-55 II, 55-250 II, 600RT x 4
I come here to learn something new, not to learn how bad my gear is - I know that already ;-)!

J.R.

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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  ;)
5D3, 6D, 600D, RX100
16-35L, 24-70L II, 70-200L II, 100-400L, 50L, 85L II, 135L, 24TSE, 40, 100 macro, 18-55 II, 55-250 II, 600RT x 4
I come here to learn something new, not to learn how bad my gear is - I know that already ;-)!

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

Skulker

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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.

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