Schneider Optics

www.schneideroptics.com

 

Linhof

fantastic grips and viewfinders

www.linhof.de/english/index.html

 

KB Canham

provided a beautifully simple 5x7 back

www.canhamcameras.com

 

Voightlander

excellent small optical viewfinders

www.voigtlaender.de

 

Sinar

wonderful camera backs

www.sinar.ch

 

Photo Gizzmo

when I need something, Louis can get it

www.photogizzmo.com