Sigma's digital-specific lenses

[Gabe]

I'm looking at the 18-50 and 55-200 DC lenses from Sigma. Though not high-end lenses from the looks of them (3.5-5.6 and 4-5.6, respectively), I'd like to know about the quality of them and any experiences you guys have had with them. A search in the Reviews turned up blank. Are the focal lengths going to be as designated when attached to a Canon D30? Even the new EF-S 18-55 for the digital Rebel was designed exclusively for it and yet will only be a 28-70 or so in terms of its real-world field of view.

Are they metal or plastic mounts? Any noticeable aberration or distortion? How about sharpness and contrast? These will be used for paid assignments when my 28-70/2.8 won't fit the subject due to the 1.6x factor. I also like the DC lenses light weight and very, very compact size. Any pros or cons, post 'em here please.

Thanks!

[Gabe]

OK, fine, I'll be the guinea pig then! LOL

I ordered a set from a seller on eBay, both for $210 including shipping. Brand new, with warranties, of course. They should even come with lens hoods.

I found out that the effective focal lengths will be as with regular lenses on a dSLR. The 18-50 should be a 28 in the wide end when fitted to my D30. So what's the big deal with them being "digital" lenses? I don't get it.

I'll let ya'll know how they turn out for me. The seller has several of these sets on eBay all the time. I saw the 55-200 on B&H's site for $140 by itself.