FA20mm vs A20mm for shooting night sky landscapes
Hi
I've recently had my first chance to try out shooting the milky way with my K-1 and FA31 (got some good shots at F2.8, 50 seconds, ISO 1600), and found it to be quite addictive. While shooting I was left thinking, I wish I could squeeze a bit more into the shot, I thought about stitching shots together for a panorama but at 31mm, might be a bit too much distortion, might try it at a later time with a longer lens. In the meantime I thought about maybe getting a wider lens, it doesn't seem that Pentax make wide angle affordable primes at this stage, so I had a look at what's available used.
There seems to be a few of these available on Ebay Japan that look in reasonable condition. Is the FA20 worth more just because of the autofocus? For night landscape I pretty much just set to infinity manual focus anyway.
I had a look at the Rokinon 20mm, but I think it's a bit large for my taste, the FA31 is about the max physical size I like to deal with.
Thoughts?
David
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