Regular or slim-mount 46mm filter for Zeiss 21mm ƒ/4.5 ZM Biogon lens?

[Kodachromeguy]

Hi Everyone,

Ken Rockwell writes that the 21mm ZM Biogon can use regular 46mm filters. The Zeiss brochure does not specify. Do any of you have personal experience with this ƒ/4.5 or the ƒ/2.8 ZM lens? Do I need slim filters or will regular ones work?

Thanks!!

 

[GarageBoy]

I'd say 21mm lens is wide enough that you should run slim filters

 

[250swb]

I've had the 21mm 2.8 ZM for many years now and always used regular filters. Can't say I've seen problems.