This is a 7Artisans RF mount. I was using it with a RED KOMODO. A set of 4 prime lenses. Except for the 12mm, they are F1.05, so they have a nice bokeh. - Lens Type: Prime lens - Number of lenses: 4 - Focal length of lenses: 12mm, 25mm, 35mm, 50mm Thank you for looking.