Samyang 500mm f/6.3 DX MC IF Mirror Lens - Sample Images
Info and Reviews:
It is also sold under a number of different brands such as Walimex, Rokinon, Vivitar and Bower.
Introduced: ??
Optical design: 7 elements in 6 groups
Lens mount: T-mount
Covers: Full-frame (24×36mm)
More info:
http://www.bhphotovideo.com/c/product/859194-REG/Samyang_SY500MF6_3_500mm_f_6_3_Mirror_Lens.html
Review:
http://www.pentaxforums.com/userreviews/samyang-500mm-f6-3-dx.html
http://hobography.net/en/review-samyang-500mm-f6-3/
Image Origin
ISO: 1250
Aperture @: f/6.3
Camera: Canon EOS 6D
Image Origin
ISO: 400
Aperture @: f/6.3
Camera: Canon EOS 6D
Image Origin
ISO: 3200
Aperture @: f/6.3
Camera: Nikon D3100
Image Origin
ISO: 2000
Aperture @: f/6.3
Camera: Canon EOS 6D
Image Origin
ISO: 3200
Aperture @: f/6.3
Camera: Nikon D5300
Image Origin
ISO: 800
Aperture @: f/6.3
Camera: Nikon D7000
Image Origin
ISO: 500
Aperture @: f/6.3
Camera: Nikon D610
Image Origin
ISO: 1250
Aperture @: f/6.3
Camera: Canon EOS 6D
Image Origin
ISO: 200
Aperture @: f/6.3
Camera: Canon EOS REBEL T2i
Image Origin
ISO: 640
Aperture @: f/6.3
Camera: Nikon D90
Image Origin
ISO: 2000
Aperture @: f/6.3
Camera: Canon EOS 6D
Image Origin
ISO: 400
Aperture @: f/6.3
Camera: Nikon D7000