Filtering for a deep red filter

[Drew Bedo]

I meter with a Minolta Autometer IV F, in incident mode or with a 5-deg spot attachment. I have had poor results in the past using a deep red filter and applying a filter factor . . .either I have a mental condition or too many fingers for counting with (while juggling the meter and fighting a dark cloth while choking on the loup's neck cord.)

Can I just meter the scene through the filter to arrive at a workable exposure?