Blackmagic Forum

I was wondering if and how a CCTV Fujian lens 35mm f/1.7 or 25mm version can fit on the nikon G mount metabones speedbooster?

The lens comes with a C mount and can fit the bmpcc without the speedbooster.. I'm new to lenses, I hope someone here can educate me.

Thanks

walkingheadpro wrote:I was wondering if and how a CCTV Fujian lens 35mm f/1.7 or 25mm version can fit on the nikon G mount metabones speedbooster?

The lens comes with a C mount and can fit the bmpcc without the speedbooster.. I'm new to lenses, I hope someone here can educate me.

Thanks

I wouldn't advise putting it on a the Speedbooster.

The effective sensor size change from the speedbooster would likely cause vignetting in the lens since the C mount was meant for Super 16mm or lower sensor size (the Fujians if I remember are Security Camera lenses or Industrial Application lenses)

The Speed Booster works by magnifying the sensor. So, to the lens, the sensor appears larger than it is.

So on the BMCC only lenses designed for ASP-C size sensors or bigger will work.

Lenses designed for smaller sensors (16mm, Super 16mm, 2/3", etc) will all vignette as the image circle would be to small to cover, the now magnified, sensor on the BMPCC.

Also since the FFD of a c-mount is even less than a MFT FFD you may, while screwing the lens into the peed booster, really screw up either the glass or the booster, depending how deep that lens needs to sit.