The following was developed for a discussion of polar
alignment at a meeting of the Orange County Astronomers'
AstroImaging group. Comments and corrections are
welcome and may be sent to
Why Polar Align?
- For visual use, being polar aligned means
simplified tracking - a constant speed on one axis is all
that is required. High power viewing virtually
- For long film exposures or even a sequence of CCD images
taken over a long period, polar-aligned tracking
avoids rotation of the image. High accuracy
alignment is required for long focal lengths, large image
areas (e.g. 4x5 film), high resolution, or long exposures.