Over in the "show us your film shots" thread, I posted some shots I took Saturday of blossoms after a snow. The shots were taken on LegacyPro100 (reputed to be Fuji Acros) medium yellow filter, exposed at ISO 100 with a +.5 stop filter factor (1/2 the usual compensation for Med yellow) and developed in dilute (1:80) R09 for just under 17 minutes at 21 degrees C with minimal agitation. I have just started using this development technique based upon results I saw from others, here. My thought was that it would help to render the subtle differences in highlights between the snow and the blossoms.
However, what I noticed is that 1) the negatives have a fairly high density and low contrast and 2) the effect of filters is blunted. The end effect is an interesting, delicate shot, but not the shot I expected.
Below are three examples from that day. The first is one I previously posted shot on LegacyPro100, but darkened a bit so that the stems come closer to matching the shots that follow in tone. The second is a color shot from a pocket camera I had with me on ISO 200 print film, and the third is the color shot rendered to BW in Photoshop with a "yellow filter." The third shot is closer to what I thought I was getting in sky tone.
The last shot (nothing special as a photo) is another roll of LegacyPro that I processed at the same time. It was shot on a different day with a medium RED filter, with half the usual filter factor for red, so, theoretically underexposed. The tones on the playground equipment are pretty close. Note that the sky is better rendered than the blossoms, but nothing like what I expect from a red filter.
So, when using this development technique should I seriously underexpose? Is Fuji Acros so sensitive to blue that filters don't have their expected effect? Other thoughts?