Sigma has announced its upcoming Mount Converter MC-31, which will allow PL-mount lenses to be used with L-mount camera systems, will start shipping on February 27, 2020 for a retail price of $679.

First announced at IBC2019, the MC-31 is constructed of an aluminum-alloy with a brass mount and locking ring. When used on the Sigma fp, the lens can also fasten with a screw thread for even more security while shooting.

Conventional? No. But it certainly gets the job done.

Sigma has included shim adjustments within the adapter at two points on the mount. ‘The flange depth can be adjusted on the camera-side mount as well as the lens-side for proper calibration of both camera and lens accuracy,’ according to Sigma.

There’s also a removable tripod socket, making it possible to attach the MC-31 to a tripod or other filmmaking rigs, as well as luminous paint (the same used on Sigma’s Cine lenses) for times when you’re shooting in low-light environments.

We will update this article with purchase links when they go live at the usual retailers.

Press release:

Sigma Mount Converter MC-31 to Begin Shipping on February 27, 2020

Pricing for the MC-31, which allows PL-Mount lenses to be used with L-Mount cameras such as the Sigma fp, will retail for $679 USD

Ronkonkoma, NYSigma Corporation of America, a leading camera, photography lens, cine lens, flash and accessories manufacturer, today announced that its Mount Converter MC-31 will begin shipping on February 27, 2020. The Mount Converter MC-31 will retail for $679 USD from authorized Sigma dealers.

Announced at IBC2019, the new Sigma Mount Converter MC-31 is a converter that allows creatives to easily adapt PL-Mount cine lenses, which are widely used in filmmaking, for L-Mount cameras including the Sigma fp as well as cameras from Leica and Panasonic. Designed for durability, its metal construction with aluminum alloy body, brass mount and locking ring ensures a secure connection between lens and camera.

For full product details and technical specifications as well as press imagery, please refer to the official press release here and imagery here.

Key Product Features:

Shim Adjustments

The MC-31 has shim adjustments on two points of the mount. The flange depth can be adjusted on the camera-side mount as well as the lens-side for proper calibration of both camera and lens accuracy.

All-Metal Construction

With an aluminum-alloy body and strong brass mount and locking ring, the MC-31 boasts excellent durability. It is also designed to be fastened on the mount of the Sigma fp with a screw thread, ensuring an even more secure connection between the lens and the camera. This allows users to shoot steady without the lens rattling even after long-term use.

Tripod Socket

The removable tripod socket allows MC-31 to be attached to a tripod or other filmmaking accessories such as a camera cage.

Secure Lens Mounting

With the screw thread removed, the stopper of the locking ring is released. This makes it possible to use MC-31 with a PL mount lens that requires tighter mounting than the MC-31's specifications, allowing the lens to lock securely in place on the converter.

Luminous Paint for Low Lighting

The markings on the upper part of the converter are in the same luminous paint as the one used for Sigma Cine Lenses, helping make it easier to replace or adjust a lens in the dark.