• Carl Zeiss Planar 3.5/100 • Includes HB-NI adapter The Carl Zeiss Planar 3.5/100 lens boasts high light transmission thanks to its T* coating, providing excellent descriptive power. I've used this for about 5 years. It shows considerable signs of use, but it's still usable. You can check the aperture by holding down the dial on the side. I used it with a digital camera. Please consider the sample photos taken last year as a reference. (Body: Canon EosR) - Brand: Carl Zeiss - Model Name: Planar 3.5/100 - Focal Length: 100mm - Maximum Aperture: f/3.5 - Features: T* Coating