#6 4" w/ 2" opening. Instantaneous and bulb with a pin installed or not has flash sync $45
#6 4 3/4" w/ 2 1/2" opening. Instantaneous and bulb with a pin installed or not has flash sync $55
#8 5" w/ 2 3/4" opening. Has Piston for Bulb and Time and separate piston for Instant. All you need is the instant side. You can stop it full open with that piston with a little practice for time exposures and focus. The left side piston is superfluous $60
Takes about $8 bucks to mail these in USA only.
#6 4 3/4" w/ 2 1/2" opening. Instantaneous and bulb with a pin installed or not has flash sync $55
#8 5" w/ 2 3/4" opening. Has Piston for Bulb and Time and separate piston for Instant. All you need is the instant side. You can stop it full open with that piston with a little practice for time exposures and focus. The left side piston is superfluous $60
Takes about $8 bucks to mail these in USA only.