Pre-exposing film

[brbo]

I’ve been looking at the Lomo Sprocket Rocket as a tool to this madness �� but the rewind would be better served if it had a crank, instead of a knob. Think the knob would be too slow at rewinding, for me at least.

Do you really need a camera for that? Just use a second film canister and wind the film into it. You can control the exposure with the distance between both film canisters (slit width) and the distance of the pre-flash source from the film. Making a "rewind lever" for the take-up canister that would allow for a reasonably stable speed of rewinding shouldn't be too hard...

 

[Ricoh]

Do you really need a camera for that? Just use a second film canister and wind the film into it. You can control the exposure with the distance between both film canisters (slit width) and the distance of the pre-flash source from the film. Making a "rewind lever" for the take-up canister that would allow for a reasonably stable speed of rewinding shouldn't be too hard...

Sounds like a darkroom job and a really dim monitor as a light light source.

BTW, I’d like to know how Revolog and Doubble film do it.

 

[retinax]

It may come to that in the end (will there every be an end? I can hear the collective RFF membership screaming!).
I’ve been looking at the Lomo Sprocket Rocket as a tool to this madness 😂 but the rewind would be better served if it had a crank, instead of a knob. Think the knob would be too slow at rewinding, for me at least.

My post, which you posted this in response to, was about pre-exposing frame by frame.

 

[Ronald M]

I learned from a pro 50 years ago to post expose. Hang the film in your dark room with a very small bulb and enlarger timer set to .10 sec or 1/2 , I forget.

He did weddings and pics were superb.

You will never wind evenly enough. To find exposure, flash just enough to see fog compared to space between frames, then cut 1 stop. Then do the same with real film.

Keep the light 10 feet away to minimize exposure difference from mid roll to ends.

 

[oftheherd]

My post, which you posted this in response to, was about pre-exposing frame by frame.

Everyone has their own preferred method after experimentation. But I am inclined to think your method is the one with the most advantages. You are controlling your photos one frame at a time so more control I would think. Someone mentioned a dim TV.

I think one can work with that idea of less exposure and get better photos; or at least know which will give you what you want with different photo opportunities. And if you are outside, the sky or grass or whatever has a color you would like to tint your photo with. Another reason one might prefer one exposure at a time.

If you still wish to expose an entire roll, a blank room, light, one color wall, and flash will work too.

Again, everyone has to experiment to get what they like. I never tried exposing a whole roll first, only a frame at time. I did that very seldom. It worked well sometimes and many times left me wondering what in the world I thought I was doing.

Of course, the OP may disagree.

 

[Phil_F_NM]

How about getting a camera that has a removable door (Nikon FE, FA, FM series, F2, F3, etc, other manufacturers' models) and find a donor door which you could cut a slit into. When you finish a roll, stick the camera in a changing bag, swap the door, pull it out of the bag, then rewind and flash it like you want.
If you want a really consistent way to flash film, find a Bell and Howell 71 Filmo, remove the shutter blind and run the roll through that. It will pull a 36 exposure roll through in a couple seconds. This method would guarantee even exposure better than any other method, aside from a purpose-built drive.
Phil Forrest

 

[Ricoh]

Some ideas there, thanks everyone.