Bokeh samples from same dist. between 200mm @2.8 and 135 @2.0

I THINK this is what he is asking.

Imagine this. At 200 you are 20 FT from subject and using 2.8. You bokeh will look a certain way..etc.

NOW, take the 135 and place the same subject at 13.5 feet BUT at 2.0.

This way you can see at the same FIELD OF VIEW, how different the bokeh looks at the same feild of view.

I can tell you this, when I shot with my 2.8 100MM from 20 feet, and then shot with my 70-200 F4 at F4 at 40 feet, the bokeh looked VERY different.

But I will also say this, I prefer the get further back, to compress the image as MUCH as possible.

I try to tell this to people all the time, DO NOT SHOOT wide and think you can just CROP the image in and get the same results. Shoot as far away as you can, and zoom in as much as possible.

In my teachings, I shot the same portrait at 45mm, at 15 feet, and then 105mm at 35feet, and the image was A LOT better.

yoms wrote:

Hello,

There are some test shots out there that compare the bokeh between the Canon EF 70-200mm f/2.8L IS USM II and the Canon EF 135mm f/2.0L USM, but so far I did not find any that compare them from the same subject distance.

Just to clarify: by bokeh I do NOT mean DOF. I can use http://dofmaster.com/dofjs.html to calculate this. It appears that DOF is thinner at 200mm @f/2.8 than 135mm @f/2.0 if subject distance is the same. I am only interested by the look of what is actually OOF in both cases, not in technical/math aspects.

Also, I know that if subject distance is the same, the FOV of a shot at 200mm is narrower than at 135mm. But in real life, this happens too (can't get closer, avoid too much intrusion, etc.) so I really stick to a fixed-distance-from-subject scenario.

Could anyone post or give some links of the "same" photograph taken from the same subject distance at 200mm @f/2.8 with the Canon EF 70-200mm f/2.8L IS USM II and then at 135mm @f/2.0 with the Canon EF 135mm f/2.0L USM ? Just to appreciate the amount and quality of what is actually OOF, that is to say the bokeh.

Many thanks,