Telescope Maintenance 57
11. Monitor your guide star for the duration of the exposure using the buttons on the hand controller to
make the needed corrections. Don't forget to use the PEC function.
12. Close the camera's shutter.
When getting started, use fast films to record as much detail in the shortest possible time. Here are proven
recommendations:
• Ektar 1000 (color print) • Scotchchrome 400
• Konica 3200 (color print) • T-Max 3200 (black and white print)
• Fujichrome 1600D (color slide) • T-Max 400 (black and white print)
• 3M 1000 (color slide)
As you perfect your technique, try specialized films, that is films that are designed or specially treated for
celestial photography. Here are some popular choices:
• Ektar 125 (color print) • Tech Pan, gas hypered (black and white print)
• Fujichrome 100D (color slide) • T-Max 400 (black and white print)
There is no exposure determination table to help you get started. The best way to determine exposure
length is look at previously published photos to see what film/exposure combinations were used. Or take
unguided sample photos of various parts of the sky while the drive is running. Always take exposures of
various lengths to determine the best exposure time.
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