OK,
Most of my work is with the Canon 70-200 2.8 II L, but sometimes I need the reach of the 100-400.
Having been a Hater of TCs from old, I have been on the fence, get the 2X TC and use it with the 70-200 or carry a 100-400 for the times the reach is needed.
As far as I saw it the following came into play
70-200 + Canon 2x II TC
+++ Cost (A Lot cheaper than having a seperate 100-400 sitting around doing nothing)
+++ Weight (A Lot lighter having a TC in the bag rather than the 100-400
100-400
+++ Image Quality
So finally on a wet dull day I have them all sat on my desk with the chance to try out the options
Setup - £20 Note wedged on monitor on my desk, 5DII Body on Tripod 2 Meters from Target
Below are compressed images, with a link to the full size jpg below them
Although both tests are at 400mm (70-200 + TC & 100-400), The Magnifcation on the 100-400 images is smaller, not sure if this is due ot the TC Moving the lens further from the image plane, but I thought as the image plane stayed in the same place it should not have affected it?., But something affected the magnification by about 15%
All images were focused on ther circle dead centre of the note, but due to tripod angle there is some variance on DOF between the 2 lenses
1: 100-400 @ f5.6
http://www.stageshoot.co.uk/files/100400f56400.jpg
2 70-200 @ f5.6 (Inc 2 Stop Loss from 2x TC)
http://www.stageshoot.co.uk/files/70200f56400.jpg
3: 100-400 @ f8
http://www.stageshoot.co.uk/files/100400f8400.jpg
4 70-200 @ f8 (Inc 2 Stop Loss from 2x TC)
http://www.stageshoot.co.uk/files/70200f8400.jpg
5: 100-400 @ f11
http://www.stageshoot.co.uk/files/100400f11400.jpg
6 70-200 @ f11 (Inc 2 Stop Loss from 2x TC)
http://www.stageshoot.co.uk/files/70200f11400.jpg
Having done this I am suprised how little variation in the image quality there is between both lenses at all f stops,
For the drop in quality I may have to put my preconceptions about TCs aside and live with it from now for the odd time I need the extra reach.
2KG Saved and about £700 less, for the 1 lens + TC combination,
Am I mad, should I ignore this and stick to my thoughts that the 2 dedicated lenses is a better solution
Most of my work is with the Canon 70-200 2.8 II L, but sometimes I need the reach of the 100-400.
Having been a Hater of TCs from old, I have been on the fence, get the 2X TC and use it with the 70-200 or carry a 100-400 for the times the reach is needed.
As far as I saw it the following came into play
70-200 + Canon 2x II TC
+++ Cost (A Lot cheaper than having a seperate 100-400 sitting around doing nothing)
+++ Weight (A Lot lighter having a TC in the bag rather than the 100-400
100-400
+++ Image Quality
So finally on a wet dull day I have them all sat on my desk with the chance to try out the options
Setup - £20 Note wedged on monitor on my desk, 5DII Body on Tripod 2 Meters from Target
Below are compressed images, with a link to the full size jpg below them
Although both tests are at 400mm (70-200 + TC & 100-400), The Magnifcation on the 100-400 images is smaller, not sure if this is due ot the TC Moving the lens further from the image plane, but I thought as the image plane stayed in the same place it should not have affected it?., But something affected the magnification by about 15%
All images were focused on ther circle dead centre of the note, but due to tripod angle there is some variance on DOF between the 2 lenses
1: 100-400 @ f5.6
http://www.stageshoot.co.uk/files/100400f56400.jpg
2 70-200 @ f5.6 (Inc 2 Stop Loss from 2x TC)
http://www.stageshoot.co.uk/files/70200f56400.jpg
3: 100-400 @ f8
http://www.stageshoot.co.uk/files/100400f8400.jpg
4 70-200 @ f8 (Inc 2 Stop Loss from 2x TC)
http://www.stageshoot.co.uk/files/70200f8400.jpg
5: 100-400 @ f11
http://www.stageshoot.co.uk/files/100400f11400.jpg
6 70-200 @ f11 (Inc 2 Stop Loss from 2x TC)
http://www.stageshoot.co.uk/files/70200f11400.jpg
Having done this I am suprised how little variation in the image quality there is between both lenses at all f stops,
For the drop in quality I may have to put my preconceptions about TCs aside and live with it from now for the odd time I need the extra reach.
2KG Saved and about £700 less, for the 1 lens + TC combination,
Am I mad, should I ignore this and stick to my thoughts that the 2 dedicated lenses is a better solution
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