Originally posted by DSims The value of variable Fisheye distortion with the 10-17 should not be underestimated. It's images have a sharp appearance and the colors are some of the nicest you can get. Technically, if you look really close, it may not be as sharp as most non-fisheye lenses - but it gives the overall impression that it is, which matters more, IMO.
---------- Post added 04-17-14 at 05:59 PM ----------
Traditionally, people choose the Samyangs (like the 14/2.8) for astro photography, though the brand new 10/2.8 looks the most interesting for me (but I have non-Astro needs). Consider also the Pentax GPS add-on because it compensates for the movement of the earth.
Thanks ! I'll consider getting the GPS add-on. But I have a feeling something was going on on my K-5 one night when I was shooting the stars and an airliner flew into the shot with lights on and the sensor tilted so I had star trails all over the place !
---------- Post added 04-18-14 at 07:43 PM ----------
Thanks to everybody so far, those are some stunning shots, and you are all making a compelling case for the 10-17 with the advantage of it being a zoom.
I also had a concern about CA's at the corners - any thoughts ?
I'm also hoping that a Sigma 10mm owner might also make their case - anybody ?!
---------- Post added 04-18-14 at 07:52 PM ----------
Originally posted by manacho2005 Have you considered the samyang/rokinon 8mm? I have the Rokinon with removable hood...shaarrrrp. AF is not necessary with the hyperfocal distances of a fisheye, and since you mention shooting the night sky, AF won't even come into play. The price is also very nice.
Thanks for your input manacho, but I saw a review on Pentax forums where a guy who owns the Rokinon and Pentax 10-17, and the 10-17 appears to be better. I'm not after another non-AF lens. I'm after THE sharpest fisheye designed for crop sensor - I'm committed to crop sensor and not full frame.
Samyang 8mm F3.5 Fisheye CS Lens Reviews - Samyang Lenses - Pentax Lens Review Database