Mounted mostly on Nikon DSLRs and guided telescope mounts like Takahashi NJP, the ZEISS APO SONNAR lens delivers gorgeous deep space images. It is used for comets, tiny constellations, star fields, open clusters, emission and reflection nebulas at f/2.8.
It's breathtaking sharpness, micro contrast and color rendition also makes it excellent for demanding outdoor portraits or landscape details. IMO, a photo tripod is mandatory in this case.
It is a high-grade, full metal construction, hosts 11 lenses and weights 920g.
Apple iPhone 7 Plus, f/2.8 @ 6.6 mm, 1/50, ISO 25, No Flash