Originally posted by LensBeginner I like my 10-20mm, even though I agree on color rendition: I have to fiddle a little bit in the HSL panel to get the color(s) I want.
Originally posted by torashi I like my 70-300mm APO, too. It's plastic rubbish, but great glass. Lightweight anyway, and I can use it with my MZ-S. I wish there was a FF digital back for that camera, or the (FF) MZ-D would exist.
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When I was a child "Made in Japan" was a joke; my Dad used to talk about a Japanese town named Usa, which put "Made in Usa" on their products to fool Americans. He lived long enough for Japanese goods to surpass US goods in quality.
I see similar progression for "plastic". When I was a child, goods made of plastic were junky; today, supersonic aircraft are made of space-age "plastics". In 1995, I switched from Pentax to Canon because Canon lenses were clearly superior in my view; over the next twenty years I had two different kit lenses {28-80mm for 35mm and 18-55mm for APS-C} each with a
plastic mount. Neither lens ever gave me any trouble. Canon lenses were lighter than Pentax lenses - they also focused much faster. Amongst Pentax and Nikon users, "plastic" is a joke, but I have seen what others have done with plastics, and I believe "writing off" plastics is making a mistake.
Now, finally, I come back to the subject here. I have both of the Sigma lenses. When I was a Canon user, with all the fine lenses out there, the Sigma 10-20mm was the lens I valued the most {for cost/performance reasons}, and I really missed it when I moved back to Pentax in 2015. I was very happy when I could get the K-mount version of that lens. I won't claim it is the
best lens in that range, but it's entirely acceptable. I know it has a lot of glass in it; it feels like it has a lot of metal also - but, that should not be the issue ... it is well-built, regardless of what it is made of. The 70-300mm APO lens is also very good; when I tested lenses at 300mm on my Q-7, this lens placed even with Pentax's 55-300 @ f5.6, and slightly better at apertures smaller than that.