Viewfinder for 20mm

[iau]

Hi,
I'm looking to buy an optical viewfinder for my GF1. Will a 40mm Voigtlander cover the area of the 20mm, or do I need the 21mm? I was thinking that with the crop factor 40mm should be the right one.

Anyone knows?

Also, could this be used on an LX5? I know Panasonic has one 24mm for the LX3 but how is this on the GF1 and/or LX5?

Thanks in advance!
-iau

 

[razumoff]

Hi,
Here it is: The Online Photographer: Camera Reviews

Kind regards,

 

[iau]

Thanks a lot!

-iau

 

[Gwendal]

Stumbled upon this : the Diana 20mm viewfinder ! sold as part of their 20mm fisheye kit. Diana / Diana Products / Diana+ Lenses / Diana+ 20mm Lens

I guarantee nothing about quality, though...