Hi there, I've been looking at large format lenses and I did a little reading on different Copal shutters such as 0, 1, and 3, but I've been seeing a lot of "Copal Bulb". is that the same as Copal 0? or is it another type of shutter?

thanks!

"Bulb" simply means the shutter has no "T" or time setting. To hold this type open for focusing or long exposures you need a locking cable release. It has nothing to do with shutter size.

These are probably self cocking, which means the highest shutter speed will be fairly low: 1/100 to 1/150 rather than a typical 1/400