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And the IS lens is newer, and the IS lens shows other elements as well. Funny. that. Like I said, choosing which group to move for IS is one of the design parameters. It can well mean that you don't end up with more elements than you already want for all the corrections you design in.

 

It certainly does not mean lenses with IS are more expensive either, Sony lenses without IS were more expensive than their Canon counterparts with IS.