10-13-2010, 12:05 PM
[quote name='Reinier' timestamp='1286969825' post='3602']
Hi Allan,
Nice photographs(as always)!
In a previous posting of mine I asked for advise for a 'new' telelens for my EOS 5D 1. You advised me, as did others, to go for the Sigma 100-300/4.0. New it is too expensive for me, but now I found a secondhand model for 430 euro and the seller says it as good as new. It is not a DG model, but I don't know if there is a big difference between the DG and the non-Dg models? Which model do you have and do you know whether the difference is worthwhile?
Hope to hear from you.
Best wishes,
Reinier
[/quote]
Hello Reinier,
There is no significant difference. The lens is optically the same. The non-DG is just older.... when Sigma started to introduce "digital" lenses (APS-C lenses), they needed a way to differentiate the lens lines in nomenclature. APS-C lenses got a "DC" addition. Sigma also added a new coating to the back element because sensors reflect a lot more light back than film, to for instance fight "purple fringing".
Lenses for full frame also got that coating, and got "DG" added to their name. But non-DG lenses perform still very well, one can not tell the difference.
I do believe you have a Canon EOS, I am correct? The only thing you should make sure of is that the lens actually is compatible with the modern EOS digital SLRs. Lenses from before 2003 or so would be incompatible with the aperture communication signals, generating an "Err99" on older DSLRs and a "Lens error" on newer DSLRs. Sigma used to offer "re-chipping" to make that problem disappear, but re-chipping is not possible anymore, as far as I know.
So... just make sure that the lens is either already compatible, or has been re-chipped in the first half of this decade. Easily tested too (and you can ask the seller. of course). Just make a picture, not wide open. If the camera locks with an error, it is not compatible electrically. If it normally exposes a photo, all is well.
Hi Allan,
Nice photographs(as always)!
In a previous posting of mine I asked for advise for a 'new' telelens for my EOS 5D 1. You advised me, as did others, to go for the Sigma 100-300/4.0. New it is too expensive for me, but now I found a secondhand model for 430 euro and the seller says it as good as new. It is not a DG model, but I don't know if there is a big difference between the DG and the non-Dg models? Which model do you have and do you know whether the difference is worthwhile?
Hope to hear from you.
Best wishes,
Reinier
[/quote]
Hello Reinier,
There is no significant difference. The lens is optically the same. The non-DG is just older.... when Sigma started to introduce "digital" lenses (APS-C lenses), they needed a way to differentiate the lens lines in nomenclature. APS-C lenses got a "DC" addition. Sigma also added a new coating to the back element because sensors reflect a lot more light back than film, to for instance fight "purple fringing".
Lenses for full frame also got that coating, and got "DG" added to their name. But non-DG lenses perform still very well, one can not tell the difference.
I do believe you have a Canon EOS, I am correct? The only thing you should make sure of is that the lens actually is compatible with the modern EOS digital SLRs. Lenses from before 2003 or so would be incompatible with the aperture communication signals, generating an "Err99" on older DSLRs and a "Lens error" on newer DSLRs. Sigma used to offer "re-chipping" to make that problem disappear, but re-chipping is not possible anymore, as far as I know.
So... just make sure that the lens is either already compatible, or has been re-chipped in the first half of this decade. Easily tested too (and you can ask the seller. of course). Just make a picture, not wide open. If the camera locks with an error, it is not compatible electrically. If it normally exposes a photo, all is well.