6x4.5 - the mini Medium Format format

The format of 6x4.5cm is the smallest of the usual MF formats - it might be seriously smaller compared to 6x7 or even 6x9 - but the equipment is seriouly less weighty, too, making carrying th equipment around if not easy then at least manageable.

This is especially true when talking about the rangefinder model Bronica RF645.

Zenza Bronica entered the 6x4.5 world in 1976 with the release of the ETR and ended it's model line in 2000 with the sought after RF 645.