Bell & Howell 240 lenses inquiry

[Mick88]

Hello everyone! After some time of lurking I've decided to join this forum.

After shooting Super8 for several years I would like to start shooting 16mm. I was thinking that a pretty nice camera to sharp my teeth with, even though it's not a reflex, would be the Bell & Howell 240 EE: I think I would prefer it over the Krasnogorsk K3 over pin registration and portability.

The one I've found includes its standard 20mm f/1.9 Super Comat lens and a B&H Filmo 16 17mm viewfinder.
I would like to know if this viewfinder is the right one for the standard 20mm lens and which viewfinder I should choose for the wide Angle and telephoto lenses. Would these fit the camera?

http://www.ebay.it/itm/142074149531?_tr ... EBIDX%3AIT

http://www.ebay.it/itm/Bell-Howell-Find ... xyY3ZRtxXS


Thank you very much in advance for your time!