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Forum: Pentax SLR Lens Discussion 09-10-2018, 08:54 AM

Astrotracer Artifacts, Samyang 14 mm
Posted By awscreo

Replies: 12
Views: 1,819

I think Astrotracer makes the stretching worse, I don't see the effect that much in my normal exposures. I use AT with longer focal lengths, it works really well, but with UWA I just stack single exposures.

Examples (at similar focal lengths):

with AT

Winter stars by Timur Dzhambinov, on Flickr

single exposure:

Light painting under the stars by Timur Dzhambinov, on Flickr

stacked:

Milky Way over the old fort by Timur Dzhambinov, on Flickr

Forum: Pentax SLR Lens Discussion 09-09-2018, 01:42 PM

Astrotracer Artifacts, Samyang 14 mm
Posted By awscreo

Replies: 12
Views: 1,819

I had the same experience. Also, I had the same "warped" star trails with UWA lenses as image above. I instead started stacking star exposures, cleaner results and much less corner trailing

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