02-25-2011, 08:08 AM
Hello everybody,
I am thinking about getting a Sigma 4.5mm f/2.8 EX DC circular fisheye for Canon ASP-C sensors, mainly for taking all-sky astro-images. There is not too much information about this lens available in the internet (or maybe I just can't find it... <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/unsure.gif' class='bbc_emoticon' alt=':unsure:' />)
Is there anyone who knows this lens? Any information about the performance of this lens (not necessarily in astrophotography, but also under more common, daytime conditions or in lab tests) would be much appreciated.
Thanks a lot,
Herbert
I am thinking about getting a Sigma 4.5mm f/2.8 EX DC circular fisheye for Canon ASP-C sensors, mainly for taking all-sky astro-images. There is not too much information about this lens available in the internet (or maybe I just can't find it... <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/unsure.gif' class='bbc_emoticon' alt=':unsure:' />)
Is there anyone who knows this lens? Any information about the performance of this lens (not necessarily in astrophotography, but also under more common, daytime conditions or in lab tests) would be much appreciated.
Thanks a lot,
Herbert