For the benefit of others who might be considering these lenses with a BM Micro Cinema Camera the following all work with Iris control when connected to the EF to BMPCC Speedbooster - Canon EF 17-40mm, Canon EF 50mm Macro, Canon EF 70-200mm F2.8 Non IS version and the Canon EF 500mm f4.5 (pre f4 IS version) which is a superb wildlife filming lens and very portable with the micro.