Mounting S35 lenses on full-frame thanks to Fujifilm

Fujifilm together with Musashi Optical Systems have announced a tele-extender that expands the Super-35 image circle of Fujinon Premier and Cabrio PL-mount lenses to cover larger sensors.

OptMag

The new, aptly named OptMag TL-OMFF is a teleconverter; it sits between the existing lens and the camera body, acting as a magnifying glass to increase the image circle by a factor of 1.7x.

This is exactly the same principle as telescopes like the popular Metabones Speedbooster, only it works in reverse. While the Speedbooster allows, for example, mounting full-frame lenses on an MFT (small sensor) camera while retaining the angle of view that lens would have on a full-frame camera, the OptMag TL-OMFF is for mounting Super-35 lenses on full-frame 35mm cameras. The focal length of the lens effectively increases, just as the Speedbooster decreased the focal length, but in both cases, the new sensor size cancels it out, without changing the angle of view. This is quite useful for a cinematographer, as there is no need to adjust their ability to visualize what a given lens length will look like.

The OptMag TL-OMFF expands the standard 27.5mm image circle to 46.3mm, allowing Super-35 lenses to cover sensors such as Sony Venice, Red Weapon, Canon C700 and Arri Alexa LF. With a weight of 350g and a length of 24.3mm, it shouldn’t affect the size and maneuverability of a camera package too much. Since the OptMag TL-OMFF is expanding the image circle, spreading the light thinner across the sensor, there is an exposure loss of 1.5 stops.

You can find out more about this product at the following link.