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Milky Way Mosaic

astrophotography dslr tripod


Alen Koebel

Milky Way Mosaic

This a portrait-mode crop from a mosaic that used a total of 11 two-minute exposures @ ISO 800 on a Pentax K-3II DSLR through a 28mm f/2.8 SMC Pentax-M lens @ f/4. (Given the cropping some of those frames are seen only partially here.) Taken August 11, 2018. The mosaic was constructed using Microsoft's Image Composite Editor (ICE). The camera was mounted directly on a tripod. Pentax's Astrotracer feature is what made multi-minute exposures possible in that situation. Even though this was shot in the country, there was a considerable amount of light pollution on the southern horizon from Kitchener-Waterloo, Ontario, roughly 25km SSE. This is the best I could do to eliminate that using a program called Sequator. Further improvement will require something like the Dynamic Background Extraction tool in PixInsight or the GradientXTerminator plug-in for Photoshop.

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