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I processed the images from the other night. F2 ISO3200 8 seconds gave round stars, noise not too bad and quite bright. 15 seconds shows some star trailng but quite bright. I think F1.4 may be able to used sometimes but F2 seems good. Not sure why the camera offered F2 as next step up from F1.4. Don't know what happened to F1.8??
I'll check on the Nikon sites to see if there is some setting in the camera about that.
The Samyang lens did not seem 100% compatible with my camera though. The set exposure time seem to be gone sometimes when readying the next shot. Not the end of the world though.
Very little distortion in the images which is good. One image though had stars in focus on the right but a bit out of focus on the left. Then on others I did not see that. A bit odd. I'll keep an eye on that.
Overall a nice lens especially for $600.
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