Alley in Pisa, Italy

by Lars Kotthoff

submit your photo


Hall of Fame
View past winners from this year

Please participate in Meta
and help us grow.

4
votes
2answers
321 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 ...
1
vote
4answers
279 views

Does an aperture value exist, where a lens creates a brighter image than the real view?

So (without limitations of the viewfinder for example) looking through the viewfinder creates a brighter image than normal view would be. The lens would then work like a funnel(collects light from ...
0
votes
0answers
36 views

Solid explanation behind the physics of the relation between aperture size and depth of field [duplicate]

Possible Duplicate: Technically, why is the out of focus area blurred more when using a bigger aperture? Many of us know that there is a relationship between the aperture size (f-stop) and ...
0
votes
0answers
89 views

Technically what happens that aperture affects Depth of field [duplicate]

Possible Duplicates: What exactly determines depth of field? Technically, why is the out of focus area blurred more when using a bigger aperture? It is obvious that the aperture affects ...