A few figures to begin with

  • Aperture : f/14
  • Minimum focusing distance : 393ft/120m
  • Weight : 220lb,100kg
  • Focal length : 5200mm, or 8320mm (with crop factor)

More details on Petapixel .


Beware not to jump too fast on low priced mirror lenses like Opteka’s 500mm f/8 telephoto or even “better” the 800mm f/8. I’m currently reviewing it and will keep you posted. Basically a middle / high end 200mm lens will bring you more light, sharpness and autofocus + stabilisation.