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Hi Logan,
Attached are images showing what my 3 lenses captured on the same night from a dark location using a Canon 6D on a tripod (no tracking), and no adjustments to the pics except for downsizing/converting to jpg (they look pretty terrible compared to the originals!).
1) Samyang f2.8 14mm: 30 sec, ISO 2500, f4.
2) Sigma 24-105 Art f4: 20 sec, ISO 6400, f4 @24mm.
3) Canon 70-200mm L IS II USM: 8 sec, ISO 6400, F2.8 @70mm.
4) What they look like.
The Samyang is fully manual and has a fair bit of distortion. The Sigma is a nice lens which lives on my camera 80% of the time. The Canon is simply stunning but is quite heavy. I bought this lens with the plan of getting a tracking mount later on for wide field astro.
Let me know if you want any more info or example shots.
Cheers Tim.
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