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500mm vs 600mm?

Started Nov 13, 2017 | Questions thread
Steve Balcombe Forum Pro • Posts: 15,582
Re: 500mm vs 600mm?

Dave wrote:

Good explanation. Thanks. I'm curious whether IS comes into play or is independent.

It's independent, but it can help with holding the focusing point in just the right place such as a single point on a bird's eye. In that sense it comes into play.

even if f/2 or f/1.4 does not help with AF, I imagine there are exposure advantages.

Absolutely, and depth of field control.

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