EOS to m 4/3 adapter with aperture function

Okay, here it is. I put together a short testvideo showing how stopping down affects DOF and vignetting.


I used my GH13 camera on a tripod, pulled out one of my LED600 panels and one light stand to hold a ruler.

Lenses used in the test:

Canon 70-200/2.8 IS II L
Canon 100/2.8 L Macro
Zeiss 85/1.4 ZE
Zeiss 50/1.4 ZE
Zeiss 35/2 ZE
Olympus 14-35/2

I also tested how it worked with the Canon 16-35/2.8 L and found out over 24mm it's safe without any vignette. But this lens does not gain much in stopping down aperture. It's the 35, 50 and 85 lenses I tend to use the most so these where the most interesting to try.
 
editman said:
I does definitively affect DOF in the 50-85mm area that's for sure and it does not vignette between 35mm and 100mm when you are within 1-6. I'll do some more testing from 14mm to 200mm with a plethora of lenses in a couple of hours.
Click to expand...

So you think that if I put a Canon 24-105L f4 on there that I would not get any vignetting?
 
So, it seems to vignette on certain lenses, but not all. It does affect the depth of field, more so at the smallest aperture.
 
Correct, use it between 24 and 85mm and your are probably safe. I think it's useful and at least makes it possible to use Zeiss ZE lenses or other Canon EF-mount lenses but don't expect it to be one adapter that works on every lens.

Built quality is great and the aperture ring feels smooth to turn. Until something better emerges it's good.
 
editman said:
Okay, here it is. I put together a short testvideo showing how stopping down affects DOF and vignetting.


I used my GH13 camera on a tripod, pulled out one of my LED600 panels and one light stand to hold a ruler.

Lenses used in the test:

Canon 70-200/2.8 IS II L
Canon 100/2.8 L Macro
Zeiss 85/1.4 ZE
Zeiss 50/1.4 ZE
Zeiss 35/2 ZE
Olympus 14-35/2

I also tested how it worked with the Canon 16-35/2.8 L and found out over 24mm it's safe without any vignette. But this lens does not gain much in stopping down aperture. It's the 35, 50 and 85 lenses I tend to use the most so these where the most interesting to try.
Click to expand...

At first I thought this was a great idea, but was a little skeptical, but after seeing this video I will most definitely pass on this product.
 
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