The adaptor is designed to bring out the maximum optical performance of Super 35mm format PL mount lenses and to minimize optical performance deterioration.
The BAVEYES PL/S35-PL/FF 1.4x expander from KIPON Optical System convert S35 lens to FF lens to cover FF cameras, enough lens intake depth, fit most of S35 cine lenses, extra lens checker included with adapter. This covers the traditional 36 x 24mm sensor size and smaller. Its optical design was created to minimize the impact on the optical character of the lens.
The expander increases your focal length by 1.4x and reduces your light by just 1 stop, making it possible to convert a Super 35 lens to cover full frame sensors. The 1.4x expander sets up easily with its own integrated flange back adjustment with no shimming necessary. The Super 35 lens used must cover an image circle of at least 31mm into the camera natively.