References

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About the astrotracer

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Pentax astrotracer page

Pentax astrotracer calibration page

Pentaxforums astrophotography group

Ian Norman review of the Pentax K-1 II

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About astrophography techniques

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Astrobackyard

Lonely Speck

Adam Woodworth

Into The Night Photography

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Inspiring astrophotography work

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Stéphane Poirier gallery

The Art Of Night

The World At Night (TWAN)​

The Amazing Sky

Kevin Palmer

Wally Pacholka

Mikko Lagerstedt

Ollie Taylor

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