Newest 'aperture+lens-design+f-stop' Questions

9 votes

4 answers

1k views

What motivated lens makers to now use 1/3 f-stops rather than say 1/4 or 1/2 stops?

I've noticed that many older lens have just hard f-stops for lens (2, 2.8, etc). However, since the aperture wheel for some is continuous you can "stop" are some arbitrary point and shoot. From my ...

unsignedzero

2,063

asked Oct 25, 2016 at 17:41

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, ...

inckka

241

asked Aug 20, 2014 at 2:12

3 votes

2 answers

4k views

What's the difference between real and effective aperture?

I understand that the simple idea that f-stop is focal length divided by aperture really applies to a simple single-glass lens, not the compound lens systems used to provide good image quality in ...

mattdm

143k

asked Apr 9, 2013 at 11:47

11 votes

3 answers

900 views

What is the limiting factor in lens construction when it comes to f-stop values?

This widely praised Nikon 105mm macro lens has a maximum f-stop value of 2.8. I've held it in my hands, it's a big lens. Meanwhile, this 50mm Nikon lens can go up to f/1.2, despite being 25% cheaper ...

Drew

2,465

asked Jan 26, 2012 at 9:53

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