danski0224 Offline Upload & Sell: Off
|
The Sigma 70mm Art macro extends like the previous version, and it is focus by wire.
Unlike the older version, it will auto focus and lock. However, it is not fast like the Canon 100mm. If the focus is close, it usually locks in reasonably quickly but it can also cycle the lens in and out to try again. It is much queter than the older version.
As I understand it, extending macro lenses retain their original focal length unlike internal focus designs like the Canon 100mm macro lenses.
Either 70mm Sigma macro is very lightweight.
Not many choices near 50mm with auto focus.
The Sigma EX DG 50mm isn't USM motor focus, but it is 1:1 without a tube or converter.
The Zeiss isn't auto focus or 1:1.
The Canon life size converter does work with other EF lenses. I don't know how close to 1:1 you get using it on a different 50mm lens.
|