DIY Red Scale ISO Compensation?

[Eliot]

So I saw this article a couple years ago and thought it might be an interesting thing to try out. Apparently loading color film into your camera backwards will result in a red scale effect. However, I'm assuming you would also need to compensate for the film's tint by lowering the ISO settings. Does anyone know how much I would need to lower my ISO from the film's original ISO to achieve a correct exposure?

I'm new around here and can't post the link to the article, but just type 'DIY Red Scale Film' into a Google search and the first 2 links are what I'm talking about.

Towards the bottom of the DIYPhotography article, the author briefly mentions that it is rated at 100ISO, but I'm assuming that number would change depending on the film's original rated ISO. He's using 800, so if 800:100, then what would 400 or 200 be?

 

[bvy]

I've done this. I'd recommend a film like Superia 800 rated at 200 or, even better, 100. Even doing that, pick bright scenes. I've not gotten good results in shade or drab lighting.

 

[Eliot]

Sounds good. I've still got a few rolls of 800 Superia in my stockpile. Would you suggest using a tripod, or was handheld good enough for you to get clear shots?

 

[AgX]

What makes you think that there is a loss of sensitivity?
Of influence are several components of the film, so far I counted six, more precise their existance resp. their characteristics.
As well as the colour of the lighting and the subject.


Thus it must be contemplated on, or rather tested in the very case.

 

[frank]

What makes you think that there is a loss of sensitivity?
Of influence are several components of the film, so far I counted six, more precise their existance resp. their characteristics.

Thus it must be contemplated on, or rather tested in the very case.

Light first has to pass through the orange mask. It's like placing an orange filter on the lens.

 

[AgX]

There is no orange mask light has to pass through first. Film structure is more complicated than this. Furthermore there are films of different design, in basics as in details.

 

[bvy]

Sounds good. I've still got a few rolls of 800 Superia in my stockpile. Would you suggest using a tripod, or was handheld good enough for you to get clear shots?

Well, it's like any other film shot at 200 or 100. If your shutter speeds are fast enough (less than about 1/60 on a normal or wide lens), then you can get away with not using a tripod.