The Apo-Symmar 90 MM F/4 HFT PQS Lens is a versatile macro lens that comes with an apochromatic correction feature.This Apo-Symmar lens has a long helical mount to ensure focusing from infinity up to 1:2 reproduction ratio without additional Sinar accessoriesWith a focal length of 90mm, this lens has an aperture range of 4-32