ring around test for b/w film

[josephdisipio]

I have made ring around tests in the past, shooting 5 exposures, 2 stops over,

1 stop over, Normal, 1 stop under, 2 stops under. Rather than shoot 5 frames,

put the camera in the changing bag, and cut the film, process it etc. there is

a way, to shoot the whole roll. I did it years ago, but I want to be sure of

it. After the 5 frames, you can shoot, 3 or is it 5 blank frames, then 5 for

the test, then 3 or 5 blank frames, etc. until you run out of the 36 exp.

roll. Then simply cut the film in half, then those halves in quarters, and you

end up with 4 strips of film, which of course you put in separate light tight

cannisters, and process, individually. So, is it 3 blank exposures, or 5?

Process one normally, the other 10% longer, etc. Thanks.

[ronald_moravec1]

Take a finished uncut roll and mark off where the different frames are from the end on piece of mattboard or other place like your benchtop. I have a double layer of mattboard where the curve of the leader ends so I can find it in the dark.

 

To process x exposures, I put the film can at x length in the light, turn off the light, and draw film out to to the proper end. Draw out at a tangent like the film comes out in the camera otherwise you risk scratching.

 

If you routinely want to cut small sections, I would double the thickness with small strips or cut notches at 6,12,18,24,and 30.

[josephdisipio]

Thanks for the info, but it doesn't answer my question. I will try your method, up to a point, by before cutting a processed roll of film, I will figure it out, wether it is 3 blank frames, or 5. Thanks again.

[cb_martinez]

How about this:

First two frames leave blank

Expose the five frames.

Then four frames blank.

Then expose five frames.

Then four frames blank.

Then expose five frames.

Then four frames blank.

Then expose five frames.

The remaining two frames blank.

 

If you cut the strip as you described you will end up with four strips with two frames blank on each of both ends and five frames exposed in the middle.