Haven't played around with the Bulb setting in a few years, back when I was younger and shooting film a friend and I used to play around with it painting things with a flash light or putting halos around stuff. You know, fun things you do when you're young and on stand by at work (fireman) with nothing else to do. Used to get some decent fireworks photos too. Since going digital I haven't really played around with it and apparently that setting does not mean what it used to mean. On my old Nikon "bulb" was basically putting the clutch back in the ford. Squeeze bulb, shutter opens; release bulb, shutter closes. Last night attempting to shoot fireworks I found out that regardless of how long I keep the release pressed, the exposure is going to end when it wants to. The drill is to set camera (D800) on bulb, focus to infinity, and play around with the ISO until I get the results I want. Virtually all my shots came out at 1/3 sec even though I know I held the release for over 3, even 5 seconds on some of of the shots as well as kept playing around with the ISO. I am using an electronic remote release so maybe something is going on there. Any ideas? Fiddling around with it bench testing today, hope to get this figured out before next fireworks season.