The new 800mm f/11 is coming tomorrow and it may be anticlimactic.

Started 2 months ago | Discussions thread
bernie r
bernie r Regular Member • Posts: 263
Re: Trying some things.

Hoka Hey wrote:

fredlord wrote:

All images shot from tripod with Wimberley 101 locked down on concrete patio.

Autofocused on break in fence. ISO ratings are high and a bit varied due to the different apertures but I had overcast skies. Shutter speed was the same for all. It sort of demonstrates what happens when the maximum aperture is f/11 or f/16.

Used 2-second delay and IR remote trigger for three frames and selected sharpest in each case.

I'm not saying this is scientific. I was just testing. The 500II, of course, autofocused way faster than the other lenses.

I had to shut off the EF500 II image stabilization as it kept moving. I also shut it off on the EF100-400 II. I left it on with the RF800 as it seemed not to matter.

Processed for maximum detail. USM 500-9-1, Topaz DeNoise AI 60-60-60.

I have formed some conclusions from these. Further testing will follow.






Thanks Fred.

I'd love to hear your conclusions.

To my eye, of the lenses with extenders, the EF 400+2xiii is softest. The other two are almost identical in detail in the fence with the post processing applied. The 500+2xiii obviously has the best OoF blur. However, you are seeing the images before they are converted to JPGs and run through DPR's conversion. So, that's what I look forward to hearing.

Also, it looks like you may have some stain work in your future come spring. 🙂


In real world the EF 500 II is significantly sharper than the RF 6/800's, these compressed images of a fence do it no justice, needs to be raw images of the same object at the same distance, fences aren't amazingly good for spotting detail, not when they're all zoomed in at different amounts atleast.

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