I am considering a Mamiya rb67 pro s because of the rotating back.
I do not however understand the concept ot inserting a black card or hat in front of the lens before the exposure to lock the miror or to end the metering and terminate the exposure reducing the miror shake on long/and short exposures.
Unless a black card can be inserted quickly in front of the lens to terminate the metering would not this show a partly blocked photo?
Please excuse my ignorance but this is something that I do not understand and I would have no one to materially show me how this works.
Understanding the concept would help me tremendously.
Are there any books available that shows how to take photos with the rb67 pro s other than just the users manual?