The Laowa 1.4X FF Expander is tailor-made for the OOOM to increase coverage from Super35 into full-frame without affecting its image quality. The focal length is increased by 1.4x. PL to PL accepts PL lenses and can be used on PL cameras. Designed specifically for the Laowa 25-100mm OOOM but may work on other lenses with VERY limited compatibility.