Any tips for compensating development with FP4 used in long exposures? I am trying to get barely printable detail in window drapes that I exposed four stops above middle grey. This put the darker parts of the drapes at two stops above middle grey. I chose FP4 because I love the way it handles highlights. Film was rated at 100. The meter was a Pentax Digital Spotmeter. However, I have no real experience with this film in long exposures, so I am asking for you all's experience to help me out. Bright part of curtain: EV 9 and one dot Darker part of curtain: EV 7 and one dot I made the exposure as if EV 5 and one dot was middle grey. I want a silhouette of the edges of the grand piano, with the tiniest amount of low-toned sheen on the curves and on the wooden floor of the stage. No detail in the blacks is desired (though if a little ends up there, it is no big deal); just that slight sheen on around zone II-III. My indicated exposure for f/22 was 8 seconds plus two dots. I made exposures at: f/22 at 1 minute, 4 seconds f/22 at 32 seconds f/22 at 16 seconds f/22 at 8 seconds (just to see how bad I would end up if I used the indicated exposure) f/16 at 8 seconds f/16 at 16 seconds f/32 at 32 seconds f/32 at 1 minute, 4 seconds I shot a lot, since I was unsure of myself regarding reciprocity failure. I shot at various apertures because I was interested in examining the D of F I get with this lens when shooting from far away. Normally, I am shooting up close with it. Camera was a 4x5 with a 360mm lens on a DB shutter from about 35 feet away. Thank you in advance!