Preflash tests of Kodak E100VS on M13

Preflash tests of Kodak E100SV on M13
Telescope:	AP-130 at F/8 using Nikon 1.4x teleconverter and AP Field Flattener.
Telescope:	AP 600 GoTo Mount with ST-4
Film & Exposure:	1st image: Kodak E100, one 30 min exposure with Tokai LPF Filter 2nd image: Kodak E100, one 30 min exposure with Tokai LPF Filter and Preflash at 4 stops Raw scans (no auto adj, no curves) from SprintScan 35+ shown with Blackpoint set to 30/30/30
Location:	My Driveway (Huntertown, IN), Moderate Light Pollution
Date:	June 3, 2000
Comments:	There is a noticable improvment in the image depth with preflashing. Although contrast is lower, it appears that it may reduce exposure time by at least one F stop. The preflashing was done with a 50mm lens pointing at a white matt board under fluorescent lights. A 1/60 exposure was made with a 4 stop increase from the measured normal f stop setting. Although the film background appeared to be even, large stretching of the image showed a hot vertical strip. If the astrophoto is wide field with heavy processing, a more uniform light source would be desired.
	Final Note: The nice thing about E100SV is that anything that it records can stand quite a bit of processing. The image below is a composite of two E100SV shots, one with and one without preflashing.


E100SV 30 min	E100SV 30 min with 4 Stop Preflash