In article <5hjig0$llu$1@news.isomedia.com>, aubin@isomedia.com says...
>> d_ruether@hotmail.com (Bob Neuman) writes:

>> Have you noticed a difference, now that you are not using the yellow
>> filter? My guess is that if all else is equal, you won't see any
>SNIP-2
>> subtle tonal change), don't waste the light lost by using the yellow
>> filter.

>Interesting - but I find the opposite. Out here in the Pacific Northwet,
>when I shoot B&W in the eastern part of the state, where we get blue skies,
>I do get a significant tonal difference with and without the filters.
[rest deleted...]

Interesting that you quote what I said, deleting, "unless the air is
very clear (deep blue sky)", and then disagree with what I "said"....
B-a-a-a-d form!!! ;-) And then you finish with a, "I do get a significant
tonal difference with and without the [unspecified] filters ." - having
deleted my, [Eastern US] "Results (with grey-card densities matched):
med. and dark yellow and light green filters showed no discernable tonal changes; orange showed some, and red showed a very noticeable darkening
of clear blue (only slight changes in other color tonal renditions). Conclusion: unless you work in the high areas of the Western US, or catch
one of those rare very clear days in the East (and even then if you want
only subtle tonal change), don't waste the light lost by using the yellow
filter." I do not think that your results are the "opposite" of mine,
unless you mis-quote me first... Please don't do that! (Disagreement
based on differing observation or opinion is fine [so long as the facts
are correct], but disagreement based on mis-quotes or bad editing is
not...)
Hope This Helps