Re: Pre-order: Sigma 105mm f/2.8 DG DN Macro Art ($799)
tsdevine wrote:
Arguably the Sigma "looks" less complex (you note complexity not limited to Sigma) than the Sony and CV 110, and I was able to get a good copy of the CV 110 on the first try. Arguably the Sigma is similar to the CV 125 (an older design) in terms of complexity. Watching the Sigma video posted in this thread, it seems like extra care was taking to keep ghosting (and I assume flare) under control.
Sony FE 90 G
15 elements in 11 groups
CV 110
14 elements in 12 groups
Sigma 105
12 elements in 7 groups
CV 125
11 elements in 9 groups
I haven't (as far as I know) had my CV 110 go out of whack, and I'm not sure how to evaluate whether something was underrepresented in the optimization.
-Tim
BokehBeauty wrote:
I get the impression that the recent (not only Sigma) lenses are a result of computerized optimization algorithms and little engineering mastermind. Any optimization can quickly go over board like now to me with the number of elements and groups. Then the question is, which variables like consistency in production, over lifetime, focus breathing, flaring etc. were underrepresented in the optimization.
The new Sigma is now 17 elements in 12 groups (spec per dpreview). To me this is crazy for a 100m non-Apo, non-IS Macro, considering the CV125 was at its time the highest considered APO design.
Only Canon succeeded recently to reduce the complexity in their RF 70..200mm f2.8 from the latest EF version.
Re: Pre-order: Sigma 105mm f/2.8 DG DN Macro Art ($799)
tsdevine wrote:
Arguably the Sigma "looks" less complex (you note complexity not limited to Sigma) than the Sony and CV 110, and I was able to get a good copy of the CV 110 on the first try. Arguably the Sigma is similar to the CV 125 (an older design) in terms of complexity. Watching the Sigma video posted in this thread, it seems like extra care was taking to keep ghosting (and I assume flare) under control.
Sony FE 90 G
15 elements in 11 groups
CV 110
14 elements in 12 groups
Sigma 105
12 elements in 7 groups
CV 125
11 elements in 9 groups
I haven't (as far as I know) had my CV 110 go out of whack, and I'm not sure how to evaluate whether something was underrepresented in the optimization.
-Tim
BokehBeauty wrote:
I get the impression that the recent (not only Sigma) lenses are a result of computerized optimization algorithms and little engineering mastermind. Any optimization can quickly go over board like now to me with the number of elements and groups. Then the question is, which variables like consistency in production, over lifetime, focus breathing, flaring etc. were underrepresented in the optimization.
The new Sigma is now 17 elements in 12 groups (spec per dpreview). To me this is crazy for a 100m non-Apo Macro, considering the CV125 was at its time the highest considered APO design.
Only Canon succeeded recently to reduce the complexity in their RF 70..200mm f2.8 from the latest EF version.
Oct 01, 2020 at 07:47 AM
Previous versions of BokehBeauty's message #15363072 « In Stock: Sigma 105mm f/2.8 DG DN Macro Art ($799) »
