I just saw this and am not sure what to make of the comments on the Cambo 6x12 roll film holder.
I read the comments in the videos:
and
The Cambo roll film holders are tools, and like all tools they need proper care in use and regular maintenance.
The photographer says:
"it’s tough to load rolls of film so that it both stays on the spool and doesn’t expose part of the first shot.
Also the light trap for this back is really prone to light leaks."
and
"I like it quite a bit! Loading and operation is simple enough, although this back can get light leaks through the light trap, even if the light trap material is in great shape. For this reason I have to keep the dark slide partially inserted when exposing an image."
The first is a matter of practice. I briefly owned a Sinar Zoom 2 roll film holder that I purchased along with a Sinar P2 many years ago. I had been using Horseman 6x9 and 6x12 holders for about 5 or 6 years and simply couldn't get used to loading film in the Sinar. Does that mean Sinar holders are lousy? No, it's just that I couldn't get used to it.
I bought my Sinar F2 new, way back in 1990. I then attended a Sinar workshop, where we had to do all the exercises in the Photo Know-How book. For the outdoor images, our instructor told us that SOP for LF photography was to cover the camera with the darkcloth, regardless of whether the camera was new or old. I've always followed this advice. One doesn't know when a pinhole will appear, or when the film holder isn't properly seated in the camera.
I suspect that the photographer in the video has a holder that needs servicing. It is to be noted that he isn't selling his Cambo holder, though people are asking where to buy one.
The holder I am selling doesn't have any light leaks. I have checked it with a bright LED flashlight in a darkened room.
Kumar