Crop Factor. Something to consider when buying a lens when you are shooting other than FF.

Started Jun 6, 2014 | Discussions thread
Beat Traveller Contributing Member • Posts: 744
Re: Crop Factor. Something to consider when buying a lens when you are shooting other than FF.
2

dtssounds wrote:

So when a lens has a maximum aperture of f5.6 on APS, it becomes the equivalent of f8.4 (5.6X1.5) on FF. That is why many people using such lenses on APS cameras are having a hard time throwing the background out of focus, because even at 200mm (which translate to 300mm after crop factor), you won't get shallow DoF at f8.4.

A cursory glance at examples on Flickr or 500px is enough to demonstrate it's not hard to get reasonably shallow depth of field with a 200mm lens at f/5.6 on APS-C.

It's really not as big a deal as you're making it out to be.

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