For my photography I use hypersensiticed Kodak Ektar 100. Hypersensitication is done for 6 hours in 10% H2 90% N2 forming gas at 60 deg. C and 1.5 bar.
Tests of the new Ektar 200 have shown very nice results. Hypering times are down to about 2hours at 60deg. C and 1.5 bar which makes it much easier to hyper the film on demand. Film grain of the Ektar 200 is nearly equal to the Ektar 100. Exposure times hoever are about half.
Storage of hypered film of the Ektar series is difficult. After 3 to 4 days the film must have been exposed and developped. Otherwise the colorbalance will suffer considerably.
These are some results
M31 - (128K)
Photo : G. Gottschalk, 33cm, f4 Newton, Ektar 100 hyp, 2 hours exposure.
M33 - (342K)
Photo : G. Gottschalk, 33cm, f4 Newton, Ektar 100 hyp, 2 hours exposure.
NGC6946 (64K)
Photo : G. Gottschalk, 33cm, f4 Newton, Ektar 100 hyp, 2 hours exposure.
NGC 253. Hidden Hills Observatory, 90min, 13" f4 Newton, Kodak
PPF400. (Red and green streaks from airplane)
Processing:
Dark nebula Barnard B91 and other nebulosity. A region east of the Lagoon
nebula. 6/99 Hidden Hills Observatory, 80min, 16" f4 Newton, Kodak PPF400.
Processing:
Eagle nebula Messier M16. 7/99 Hidden Hills Observatory, 120min, 16"
f4 Newton with 2x Barlow, Kodak PPF400.
Processing:
'Three Fingers' central region of Eagle nebula Messier M16. (Enlargement
from previous image) 7/99 Hidden Hills Observatory, 120min, 16" f4 Newton
with 2x Barlow, Kodak PPF400.
Processing:
M1 - (197K)
Photo : D. Hartmann, 45cm, f8 Newton, Ektar 100 hyp
Processing of the pictures is done on a computer after digitalization with Photo CDs. A modified version of the XV programm is used for processing.