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Forum: Pentax SLR Lens Discussion
08-14-2017, 04:48 AM
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For DoF, yes it will be about the same. But this doesn't mean the background blur will be. There's a calculator for that, you can adjust the parameters but it's set right now for your example:
How Much Blur? - A Bokeh Calculator - Asklens
With the parameters you chose the 70mm will provide noticeably more blur of the background (assuming it's a few metres behind the model). It will also include less of it. This can be an advantage if there are icky areas behind you'd like to avoid, and it can also make finding an area with a more consistent colour much easier.
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