Nikon NIKKOR 20mm f/4 (non-AI and AI) - Sample Images
Info and Reviews:
Introduced: 1974 - 1978
Optical design: 10 elements in 8 groups
Lens mount: Nikon F (AI)
Covers: Full-frame (24×36mm)
More info:
http://allphotolenses.com/lenses/item/c_1136.html
Review:
http://www.kenrockwell.com/nikon/20f4.htm
Image Origin
ISO: 200
Aperture @: f/8
Camera: Nikon D700
Image Origin
ISO: 3200
Aperture @: f/5.6
Camera: Nikon D800
Image Origin
ISO: 200
Aperture @: f/11
Camera: Nikon D700
Image Origin
ISO: 100
Aperture @: f/??
Camera: Nikon D80
Image Origin
ISO: 800
Aperture @: f/??
Camera: Sony NEX-5R
Image Origin
ISO: 200
Aperture @: f/??
Camera: Nikon D80
Image Origin
ISO: 200
Aperture @: f/8
Camera: Nikon D60
Image Origin
ISO: 800
Aperture @: f/?
Camera: Nikon D600