Quote:
Originally Posted by miketoll
.......but there is still something special about a stills shot taken at precisely the right moment.
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Just failed here then Mike.
Today I had a read up on pellet gun ballistics and its way beyond the kit that I have to produce something more accurate than what I have for cutting a playing card. While on the subject of ballistics I found that the pellet from the pistol is travelling at around 380 ft per second, so it is in frame for 0.002 secs
. No wonder I was struggling to get it in shot with my rudimentary trigger.
Well I had a play anyway and still never managed to get the pellet in shot. After a few partial cuts I decided to use flat head pellets to increase the possibilty of a full cut.
Attatched is a shot alas less the pellet but fractionally after the card was cut. I assume the shadow on the lower left is from a bit of the card as I used a flat head pellet for this shot. Exposure info : 1.6 secs @ f11, sufficient time to trip the shutter fire and fire the gun but not record ambient light. Flash duration, the critical thing 1/30,000 sec. Pellet travel time across the frame approx
0.00197 secs.
Also attached is a pic of a different view of my set up for the card shots. The trigger is the bit of card held by the red clips, and the red and black leads are connected to a standard pc lead linked to the Vivitar 283. To get alignment of the card, the kit on the bench is a vice on a compound table, mounted on a rotary table. The splatter on the background card is from the grape shots.
Don