Many of the reviewers on FM and other public sites of the previous, non DG version of the lens had disparaging comments about the lens being very soft at the long end, especially wide open. I'm not sure what changes Sigma is making as they gradually rename all their lenses to DG or DC from their old names. Are these all new optical designs or just marketing? I can say that I've compared my two year old 180mm f/3.5 to the "new" 180 f/3.5 DG, and they appear to be identical aside from the labelling (incidentally, a really fine lens that rivals the Canon 180). Anyone know what the changes are to their lenses?
Tom P. > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of > Markus Proske > Sent: Thursday, January 12, 2006 1:47 AM > To: [email protected] > Subject: Re: EOS 1D Mark II and Lens Test > > Kotsinadelis, Peter (Peter) wrote: > > If anyone is interested, just finished comparing the new > Sigma 135-400 > > F4.5-5.6 DG lens against the Canon EF70-200mm F2.8L IS > lens. We used > > a 1D Mk II and took shots only at F8 at focal lengths of 135, 200, > > then added a 2x on the 70-200 and did one at 300 and a last at 400. > > All shots were with camera on tripod. Viewed the raw files on PS. > > Expected to see the Sigma fair poorly but it did VERY well. > This was a > > surprise to all of use. At $599, if you can live without IS, it's a > > bargain for digital that I would feel good to recommend. Plus its > > smaller and is well built (metal not plastic). AF is not > fast like USM > > but at $599 street price not something I would worry about > unless you are shooting NASCAR. > > It does not make much sense comparing tele lenses at F8. The > Canon delivers excellent results at F2.8, die Sigma has 4.5 > or 5.0 in the comparable lengths (which is rather slow). It > is difficult to optimize lenses for open aparture, so testing > the Sigma at 4.5 or 5.0 would have been more interesting than > stopped down. Furthermore, shoothing tele you mostly lack > speed (think of moving subjects) or want a nice blur. Tele > lenses stopped down - well yes, sometimes but I do not > believe this is the general case. > > Kind regards > -Markus * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
