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Forum: Pentax K-70 06-21-2017, 03:35 PM  
Interval shooting oddity?
Posted By jbondo
Replies: 14
Views: 1,643
First part of the answer:
The curve can be caused by Perspective Distortion, Geometric Distortion, Satellite orbital parameters, or because the camera's sensor is not moving planar with the subject. The last case can happen when using astrotracer with a wide angle lens and the scene contains stars both near the poles and the equator. (it doesn't happen when using a tracking equatorial mount)

Finally:
If the curve is being cased by the sensor not moving planar to the subject, then the shape will change depending on if astrotracer is on or not. In the other cases it will make no difference.
Forum: Pentax K-70 05-08-2017, 04:19 PM  
Interval shooting oddity?
Posted By jbondo
Replies: 14
Views: 1,643
That's a typical skip trail of a "slow" (in angular speed) moving object in more than one exposure. Too slow to be a meteor. Doesn't look like a plane (missing the little strobe dot pattern) Most likely candidate is a satellite.

Or aliens ;)


and before anyone asks.... no I'm not serious about the aliens!
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