Konica IR & orange filter

["Lehman John A." <ffjal@xxxxxxxxxxxxxxxxx>]

Peter De Smidt wrote:
>
> ...  I've recently
> acquired a series 5 G (orange) filter.  I've heard that with Konica IR
> effects with a orange filter are very close to those obtained with an
> infrared filter, but one gets a significantly faster film speed.  My
> question is, does anyone have a good guesstimate as to what my new film
> speed would be?  I'll certainly do some bracketing, but I'd like to have
> some idea of what I should bracket around.

I shoot Konica 120 IR at an EI of 25 (separate meter) with an orange
filter.  EI 12 produces a slightly stronger IR effect.

Note that this is NOT metering thru the filter

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