Quote:
Originally Posted by AdamJL
The Samsung/Rokinon 135 f/2 is supposed to be incredible
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I'm extremely happy with my Samyang. I generally run it stopped down slightly to f2.8 which is of course still very fast by telescope standards.
You can see my latest effort with it here (no CA needing fixed in post):
https://www.iceinspace.com.au/forum/...d.php?t=191984
Samyang/Rokinon have pretty much their name by providing excellent nightscape/astro lenses at very modest prices (the catch being that their QC is sometimes less than optimal). There are some other notable lenses that do well at astro like the Pentax 6x7 300mm ED, Zeiss Sonnar 135 & some of the new 85mm f1.4 variants (alongside with the aforementioned Canon L-series).
Most normal lenses are designed for a range of applications and do pretty poorly at astro but there are quite a few good options these days.