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Yes it's for astro work for the most part. I assume I'd assume I would try it out at one point or another or terrestial shots but if I'm honest I'm not worried about it's daylight performance. The fisheye maybe more so but it's probably more forgiving anyway.
I'll have a look around for some of the APOs, that's the L series no? Do the older models go by another name?
I take it by the price difference the Sigma APOs aren't up to the same standard.
Last edited by JB80; 07-12-2012 at 09:22 AM.
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