Ok not sure if anyones interested in this (or if its in the right section), just got my Canon L 400mm f5.6 prime, following the talk for the 70-200mm f2.8 and IQ loss at 400mm with the 2xtc i decided to test them both out here.
I I choise the 70-200mm and tc option over the 100-400mm as i was after the 400mm prime to, as in my opinion from the test shots i did the 70-200mm kills the 100-400mm at 200mm, and better at 280mm but did suffer slightly at 400mm when viewed at 100% crops, but didnt really show up in resized pics.
So how does the 70-200mm f2.8 compare to the 400mm prime. To find out i done the same test as i did to evaluate the 70-200mm f2.8 and the 100-400mm
The test took 2 test pics of the same subject using the same focus point, i even cheated with the 70-200mm by using the IS which the 400 dosnt have.
Setting for both where
Shutter 1/250
fstop max f/5.6
ISO 100
400mm
With on builtin flash
First up the 70-200mm f2.8
The 400mm
Not bad? but as you can see the 400mm is brighter, lets see them closer.
100% crop of the 200mm
the 400mm
As you see here the 400mm prime is much sharper out the box, so the final PP results are much much better. I took a few oother outdoor shots and again the 400mm was much much faster, and brighter every tiime, and pulled far more detail from the shadows.
Time to add a 300mm L and the 500mm Sigma then i think i'll have all the lenses i could possible want lol Hope a few found this helpfully or interesting.
I I choise the 70-200mm and tc option over the 100-400mm as i was after the 400mm prime to, as in my opinion from the test shots i did the 70-200mm kills the 100-400mm at 200mm, and better at 280mm but did suffer slightly at 400mm when viewed at 100% crops, but didnt really show up in resized pics.
So how does the 70-200mm f2.8 compare to the 400mm prime. To find out i done the same test as i did to evaluate the 70-200mm f2.8 and the 100-400mm
The test took 2 test pics of the same subject using the same focus point, i even cheated with the 70-200mm by using the IS which the 400 dosnt have.
Setting for both where
Shutter 1/250
fstop max f/5.6
ISO 100
400mm
With on builtin flash
First up the 70-200mm f2.8
The 400mm
Not bad? but as you can see the 400mm is brighter, lets see them closer.
100% crop of the 200mm
the 400mm
As you see here the 400mm prime is much sharper out the box, so the final PP results are much much better. I took a few oother outdoor shots and again the 400mm was much much faster, and brighter every tiime, and pulled far more detail from the shadows.
Time to add a 300mm L and the 500mm Sigma then i think i'll have all the lenses i could possible want lol Hope a few found this helpfully or interesting.
It's impressive just how much sharper the 400 mm prime is 
