Does anyone know where can I find a convertion table that will tell me what a lens lenght is relatively in magnification factor?
Generally 1x per 50mm, or 2x per 100mm.
So a camera with a 300mm lens gives approx the same view as a scope with 6x mag; 400mm gives 8x; 500mm gives 10x; 600mm gives 12x.
Same applies if using teleconvertors...
500mm+2x = 1000mm = 20x Mag.
600mm+2x = 1200mm = 24x Mag.
Hope that helps.
It’s exactly what I wanted to know. Many thanks