DavidBeier
Veteran
I love the 18mm focal length for full wide shots when working on a crop-sensor camera. It's about the same FoV that I got used to on the HVX200 and EX1 when they were zoomed all the way out.
So why exactly is a fast 18mm prime so hard to find? I understand why they're rare for vintage lenses as, on a full frame camera, 18mm is wider than most people need. But for APSC sized sensors, why are there so few options? The only one I've seen is the Zeiss 18mm and it's only f3.5. I was always under the impression that zoom lenses tended to cost you light and weren't as fast as primes. Why is it that Canon, Sigma, and Tokina can all make a zoom with an 18mm focal length at an F2.8 but Zeiss can't make a prime 18mm faster than f3.5?
For that matter, I'm curious about all the films that are shot on Super 35 (or Red/Genisis/Alexa/ect). The format size on all of those is roughly the same as APSC and I've been told that a standard kit of Primes usually starts with an 18mm (then 24mm, 35mm, 50mm, and 85mm). Are the 18mm lenses in those kits also 3.5 or slower? What do major productions do when they've been shooting a scene on an f2 or f2.8 and suddenly they have to switch to the 18mm for a really wide shot and are limited to f3.5? Seems like a pain for night shoots or indoor scenes with natural light.
Sorry if this is a dumb question as I'm still very new to photography and lens choice.
So why exactly is a fast 18mm prime so hard to find? I understand why they're rare for vintage lenses as, on a full frame camera, 18mm is wider than most people need. But for APSC sized sensors, why are there so few options? The only one I've seen is the Zeiss 18mm and it's only f3.5. I was always under the impression that zoom lenses tended to cost you light and weren't as fast as primes. Why is it that Canon, Sigma, and Tokina can all make a zoom with an 18mm focal length at an F2.8 but Zeiss can't make a prime 18mm faster than f3.5?
For that matter, I'm curious about all the films that are shot on Super 35 (or Red/Genisis/Alexa/ect). The format size on all of those is roughly the same as APSC and I've been told that a standard kit of Primes usually starts with an 18mm (then 24mm, 35mm, 50mm, and 85mm). Are the 18mm lenses in those kits also 3.5 or slower? What do major productions do when they've been shooting a scene on an f2 or f2.8 and suddenly they have to switch to the 18mm for a really wide shot and are limited to f3.5? Seems like a pain for night shoots or indoor scenes with natural light.
Sorry if this is a dumb question as I'm still very new to photography and lens choice.