Most lenses such as this are rented for a number of reasons. For example, there's little need for ownership before and after a film is shot, so it's just an expense.
The other is that a lens such as this will be awkward to use on a day-to-day basis. It's specialized and you wouldn't use it for anything except staged and planned photography. You'd have to stop way down (which you would have the flexibility to do) to get a manageable depth of field, but then you'd struggle with artifacts from the iris unless it had a costly number of leaves/blades.
There are 'inexpensive' (~$1k) lenses that come close. I think Voigtländer and Zeiss have a couple options for f/0.95 or /1.0 in 50mm. I don't have personal experience with them (I've only rented the Leica f/0.95 50mm noctilux) but they're amazing when you want to take photos in a dark place.
I'm not sure about SLR and PL-mount lenses, though. The Canon EF mount is very popular in digital filmmaking, so you might find a really wide aperture there. Zeiss Master Series has a T-stop of 1.3, but I don't know the apertures for calculating DOF. (I'm going to guess f/0.95 or f/1.1.)
If you're just after better low light performance, sensors are getting better all the time and are a much less expensive variable to tweak. I'd probably grab a decent f/1.4 or even f/1.8 and then look for the best low-noise sensor I could afford. $2k of sensor would buy you $10k of lens.
Comments
Most lenses such as this are rented for a number of reasons. For example, there's little need for ownership before and after a film is shot, so it's just an expense.
The other is that a lens such as this will be awkward to use on a day-to-day basis. It's specialized and you wouldn't use it for anything except staged and planned photography. You'd have to stop way down (which you would have the flexibility to do) to get a manageable depth of field, but then you'd struggle with artifacts from the iris unless it had a costly number of leaves/blades.
There are 'inexpensive' (~$1k) lenses that come close. I think Voigtländer and Zeiss have a couple options for f/0.95 or /1.0 in 50mm. I don't have personal experience with them (I've only rented the Leica f/0.95 50mm noctilux) but they're amazing when you want to take photos in a dark place.
I'm not sure about SLR and PL-mount lenses, though. The Canon EF mount is very popular in digital filmmaking, so you might find a really wide aperture there. Zeiss Master Series has a T-stop of 1.3, but I don't know the apertures for calculating DOF. (I'm going to guess f/0.95 or f/1.1.)
If you're just after better low light performance, sensors are getting better all the time and are a much less expensive variable to tweak. I'd probably grab a decent f/1.4 or even f/1.8 and then look for the best low-noise sensor I could afford. $2k of sensor would buy you $10k of lens.