All Questions
3
questions
5
votes
2
answers
2k
views
Why do zooms have small apertures even around 50mm?
A 50mm f/1.8 prime from one of the major manufacturers can easily be found for $200 or less, but zooms that include 50mm in their range always seem to have much smaller apertures even at 50mm until ...
- 185
1
vote
1
answer
213
views
what is the barriers of making fast lenses? [duplicate]
I know there are lenses like f/0.7
However as a beginner I'm wondering what's the barrier of making ultra fast lenses like f/0.01 ?
Also if lens manufacturers willing to make wide aperture lenses, ...
- 241
26
votes
5
answers
8k
views
What is special about lenses with f-number < 1?
Talking about fast lenses, Wikipedia mentions
Nikon TV-Nikkor 35mm f/0.9-Fastest Nikon lens ever made
Why don't, for example, f/0.5 lenses exist?
Is there some special construction that comes ...
- 4,049
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