About tom, that the brighter the lens, the greater its weight and size, everyone knows. Of course, These parameters are always relative, Much depends on the design and field fields, because, For example, Mitakon Speedmaster has 25 mm, although light f/0.95 is not heavy. However 200 mm glass with bright f/1 has no chance to be easy. For example, Nikon Nikkor 200 mm f/2 g if-ed-s vr ii weighs almost 3 kilogram. In turn, Canon EF 200MM F/2L IS USM is easier, because it weighs 2,5 kilogram.
This is what Canon and Nikon lenses look like
Rank-Taylor Irtal lens 200 mm f/1 resembles a form of Nikkor and Canon lenses, but weight and size exceeds them. This is not a consumer product, and made to order, Therefore, no one focuses on his appearance.
The lens has 20 cm in diameter
price, which we will see in ebay in practice such a lens costs around 40000 dollars, That is, approximately in 6 times more, than mentioned Nikkor or Canon, but the fate of others.
A source: own