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Extremely Sharp -- TC Use knocks off a star

Started 11 months ago | User reviews thread
Mark B.
Mark B. Forum Pro • Posts: 29,743
Re: Extremely Sharp -- TC Use knocks off a star

birdbrain wrote:

  • Mark B. wrote:

Karl_Guttag wrote:

The RF100-500 is very sharp even in the corners wide open throughout the zoom range.

The biggest drawback of the lens is its use with teleconverters. While the combination is very sharp, the use of the Canon RF1.4x or RF2x TCs limited the zoom dramatically. It takes you from a 5x zoom range down to only 1.67x. This can be a major problem if you need the zoom range in a given shooting situation. The other major brand's similar lenses don't have this limitation.

Does anyone know why the focal range is limited with the TC?

Erm…. The rear element of the lens would crash into the TC is the simple answer.

Presumably optic design constraints are the reason it is made that way?

Is there something that would prevent the user from inadvertently zooming back far enough to do that?

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