Engineering Service, Inc.
Fujinon has announced the OptMag TL-OMFF, an optical adaptor that expands the Super-35 image circle of PL Mount lenses on Full Frame sensor cameras without vignetting. The OptMag TL-OMFF has been developed specifically for use with Fujinon’s Premier and Cabrio PL-mount lenses. It’s unclear whether it will work on other PL lenses.
The OptMag TL-OMFF expands the Premier and Cabrio PL-mount lenses by 1.7x, so that they can cover larger format cameras (up to 46.3mm diagonal image size), such as the Sony VENICE, Arri ALEXA LF and RED WEAPON. Fujinon claims that when the Premier and Cabrio lenses are used with the OptMag TL-OMFF they are still capable of maintaining excellent optical performance.
Fujinon optical engineers teamed up with Musashi-Opt’s design team to ensure that the “Fujinon look” is not affected by the use of the adaptor and that the same color rendition, clarity, and contrast as Fujinon Premier and Cabrio lenses is maintained. Fujinon claims that even when the image is expanded by 1.7x, distortion and aberrations are still minimal.
As the image circle is enlarged from Super-35 to Full Frame, the angular field of view of the lens used on a Super-35 sensor does not change when the expander is used on a Full Frame sensor. There is a 1.5 stop reduction in light transmittance.
The TL-OMFF weighs 350g and increases the total length of the lens it is attached to by just 24.3mm. This is very important for cinematographers that are limited in the space they have, such as shooting from cars, helicopters or within small locations.
The OptMag TL-OMFF is available in Europe from the end of August 2018. It’s also nice to see that it works with the companies XK 20-120mm T3.5 lens which is signifigantly cheaper than the Premier and Cabrio lenses.
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