Yesterday we finally had some clear skies, so I drove out of town after moonset, hoping to get away from light pollution. Unfortunately that’s pretty much impossible where I live, unless I drive much farther and to higher elevations. Not a good idea when moonset is at midnight on a weekday, so I had to settle for a nearby hilltop.
In any case, I saw a chance to test the light collecting capabilities of my new Samyang/Rokinon 12mm f/2.0 NCS CSlens and I tried to take it. What looked like a perfectly clear sky, however, turned out to have some thin clouds in it that reflected a lot of light from neighboring cities. Bummer.
Not that I expected to get a great shot, as I knew conditions here are never good for this. I checked that on the new moon after the next I will be on a small Greek island, so maybe I will have better chances then.
My aim was mostly to test the lens, so here are some very preliminary observations that will need to be confirmed by more serious testing. As expected, given the lens’ characteristics, I can get lots of stars and minimal streaking with a 20s exposure at 1600 ISO. When the sky is really dark, I expect to see many more. This is one of the reasons I bought this particular lens.
This thing is sharp and there is no chromatic aberration that I can see. This is good.
When the focus ring is turned all the way to infinity, focus is off. You need to stop a fraction of a degree before the hard stop to get perfect focus. I will have to experiment to find the optimal position.
This thing vignettes like crazy at f/2.0. The photo you see here had +55 of vignetting compensation added in Lightroom.
So far, so good. More to come.
P.S. For some inscrutable reason, Samyang lenses are sold under the Rokinon brand in some countries, so you might find them easier under that name.