PhotoCamel - Your Friendly Photo Forum - View Single Post

rpcrowe · 05-21-2006

I am not a Canon snob and use Canon lenses (including a couple of L lenses), a Tamron, two Tokina's and a Sigma. IMO, the big problem with Sigma is the reverse engineering which may leave you without an operational lens if Canon releases a new body. Sure, Sigma will rechip a Sigma lens that is currently in production but, will/can not rechip a lens that is out of production. I have four lenses that are no longer produced: Canon 50mm f/1.8 Mark-I, Tokina 400mm f/5.6 ATX, Tamron 90mm f/2.8 Macro (earlier version) and a Sigma 28mm f/1.8. All of these are fine lenses and obviopusly I can use the Canon on both my 10D and my XT. This is also true of the Tamron and Tokina lenses but, I cannot use the Sigma on my XT and Sigma will not upgrade it because it is not a lens in current production.

The Sigma system of reverse engineering could force you to either retain an older Canon camera or sell the Sigma lens when you upgrade your Canon body.

05-21-2006	#8 (permalink)
rpcrowe Vicuna Posts: 213 CamelKarma: 31 Gallery \| Blog	My only problem with Sigma I am not a Canon snob and use Canon lenses (including a couple of L lenses), a Tamron, two Tokina's and a Sigma. IMO, the big problem with Sigma is the reverse engineering which may leave you without an operational lens if Canon releases a new body. Sure, Sigma will rechip a Sigma lens that is currently in production but, will/can not rechip a lens that is out of production. I have four lenses that are no longer produced: Canon 50mm f/1.8 Mark-I, Tokina 400mm f/5.6 ATX, Tamron 90mm f/2.8 Macro (earlier version) and a Sigma 28mm f/1.8. All of these are fine lenses and obviopusly I can use the Canon on both my 10D and my XT. This is also true of the Tamron and Tokina lenses but, I cannot use the Sigma on my XT and Sigma will not upgrade it because it is not a lens in current production. The Sigma system of reverse engineering could force you to either retain an older Canon camera or sell the Sigma lens when you upgrade your Canon body.
rpcrowe Vicuna Posts: 213 CamelKarma: 31 Gallery \| Blog	__________________ I'm a retired Navy Photographer with considerable commercial experience including weddings, portraits and pet photography.