<p>I'm not familiar with the setup you described, but does that adapter have some sort of iris control built into it?  I have the adapter pictured below and it doesn't allow the BMPCC to adjust the aperture of the lens, which means I need to use the iris control to adjust the amount of light getting let into the camera.</p>

<p><a href="https://i.sstatic.net/k04uG.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/k04uG.jpg" alt="adapter"></a></p>

<p>The vignetting is caused by how the iris inside the adapter functions. When you close the iris, to restrict the light entering the camera, it also has the side-effect of creating a vignette.  This is the main reason I stopped using the BMPCC and went back to using the regular BMCC, because I don't have any MFT lenses.</p>

CC BY-SA 3.0
2016-05-20T11:18:08.400Z
no, arrib to mft adapter doesn't have IRIS control inside. [photo](http://www.rafcamera.com/media/extendware/ewimageopt/media/inline/61/8/arri-bayonet-arri-b-lens-to-mft-micro-4-3-camera-mount-adapter-514.jpg)
Sergey P.
CC BY-SA 3.0
2016-05-20T13:54:20.250Z
@SergeyP. thanks for the info.  I'm not sure what the issue is then, sorry!
Manly
CC BY-SA 3.0
2016-05-19T17:35:34.233Z
2016-05-19T19:26:48.233Z
2016-05-19T19:26:48.233Z
Manly
<p>BMPCC does not support super16 lens?</p>

<p>Example 1.3T - 16T 
<a href="https://www.youtube.com/watch?v=oOxKb_X7tMA" rel="nofollow">video test</a></p>

CC BY-SA 3.0
2016-05-27T09:28:10.747Z
I have an old Angénieux zoom on a 16mm Bolex that would vignette quite badly at some zoom/aperture settings, and it was made for 16mm. Maybe it's just the way the lens is?
stib
<video><camera>
BMPCC + rafcamera arri b to mft + optar 1.2/12mm = vignetting
Sergey P.
# BMPCC + rafcamera arri b to mft + optar 1.2/12mm = vignetting

(Asked by: username_0 on 2016-05-19)

BMPCC does not support super16 lens?

Example 1.3T - 16T
[video test](https://www.youtube.com/watch?v=oOxKb_X7tMA)

**Tags:** video, camera

> **Comments:**
> **username_1**: I have an old Angénieux zoom on a 16mm Bolex that would vignette quite badly at some zoom/aperture settings, and it was made for 16mm. Maybe it's just the way the lens is?  

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## 1 answers

### Answer by username_2 on 2016-05-19. Score: 2

I'm not familiar with the setup you described, but does that adapter have some sort of iris control built into it? I have the adapter pictured below and it doesn't allow the BMPCC to adjust the aperture of the lens, which means I need to use the iris control to adjust the amount of light getting let into the camera.

[![adapter](https://i.sstatic.net/k04uG.jpg)](https://i.sstatic.net/k04uG.jpg)

The vignetting is caused by how the iris inside the adapter functions. When you close the iris, to restrict the light entering the camera, it also has the side-effect of creating a vignette. This is the main reason I stopped using the BMPCC and went back to using the regular BMCC, because I don't have any MFT lenses.

> **Comments:**
> **username_0**: no, arrib to mft adapter doesn't have IRIS control inside. [photo](http://www.rafcamera.com/media/extendware/ewimageopt/media/inline/61/8/arri-bayonet-arri-b-lens-to-mft-micro-4-3-camera-mount-adapter-514.jpg)  
> **username_2**: @SergeyP. thanks for the info.  I'm not sure what the issue is then, sorry!  

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