Difference between Bayonet & Screw mounts?

Hi, guys.

I am soon going to purchase a Century death lens (.3x ultra fisheye). And I was wondering what are the differences between the bayonet mount and the screw mount, because this lens comes in both forms. Thanks!

There have been various bayonet mount lens designed over the years for various cameras which accept a bayonet mount lens. I don't know what camcorder you are using but I am not aware of any consumer camcorders which have a bayonet mount. The Canon GL-1 and GL-2 "pro-sumer" camcorders use a bayonet mount.

You probably need a screw mount of the appropriate size.



Rich

There have been various bayonet mount lens designed over the years for various cameras which accept a bayonet mount lens. I don't know what camcorder you are using but I am not aware of any consumer camcorders which have a bayonet mount. The Canon GL-1 and GL-2 "pro-sumer" camcorders use a bayonet mount.

You probably need a screw mount of the appropriate size.



Rich

I have a VX2100.

The VX2100 has a bayonet mount for the hood. If you get a lens with the correct bayonet mount you will be limited to use it only on a VX2100 (maybe a VX 2000, PD170 etc).

The bayonet mount attaches and is removed much faster (1/4 turn and it comes off) whereas threaded lens have to be screwed on.

It's up to you. Remove the hood to get an idea how its held on with the bayonet mount.


Rich

The VX2100 has a bayonet mount for the hood. If you get a lens with the correct bayonet mount you will be limited to use it only on a VX2100 (maybe a VX 2000, PD170 etc).

The bayonet mount attaches and is removed much faster (1/4 turn and it comes off) whereas threaded lens have to be screwed on.

It's up to you. Remove the hood to get an idea how its held on with the bayonet mount.


Rich

ohh all right, now i see it. the tabs are used to put the lens on. cool, i rather get that, fast to put on, fast to take off, less wear and tear and it locks easy.

Yes, bayonet is easier.


Rich

There are reasons to use a bayonet mount besides just speed and less wear and tear. One of the main reasons they were developed and used by pros was because different threaded lenses around the world didn't always match up with the established base of cameras. In particular the differences between Europe and metric thread pitch designs and the USA with SAE pitch designs were a common problem. If you bought a camera in the US and tried to buy a lens in Germany you could end up with threads that looked the same but really weren't. It wasn't until the 1970's when screw type mount lenses were made popular by Japanese companies.

There are still good reasons to use a bayonet mount. Speed and minimum focusing distance are both better on bayonet mounts. But IMO you are going to be limited in where you can use your lens down the road because most of the world has pretty much gone to screw mounts. I end up keeping my lenses and using them with my newer equipment. That may not be possible with bayonet mounts. Screw mounts are much more standardized these days. I'd go for the screw mount if I were you.