Road Train !!!!!!!!!!

by Russell McMahon

submit your photo


Hall of Fame
View past winners from this year

Please participate in Meta
and help us grow.

2
votes
0answers
114 views

In what way does the lens mount limit the maximum possible aperture of a lens?

In many answers to questions about different aspects of really large aperture lenses it's pointed out that the lens mount sets a hard limit on the maximum possible aperture of the lenses to that ...
4
votes
2answers
329 views

What are the theoretical minimum and maximum apertures?

Is there such a thing as a maximum aperture that a lens can be open to? What about a minimum aperture that it can be closed to? Do these concepts even make any sense? Is there a lens with the ...