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AmbientMike
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Re: Crope mode Vs Crop in post affecting Background blur?


A 1.8 lens is a 1.8 lens. If you shoot it on aps, or crop in post, it's the same field of view as a 1.5x longer focal length lens on ff.

But it is still a 1.8 lens, for exposure.

If you used an 83mm lens, at 1.8, on ff, you'd have less dof than a 55mm on aps. But both would give about the same field.

You might have to stop an 83mm down to 2.8, to approximate the dof with the 55mm at 1.8, used on crop.

This might require a higher iso. But you should get the same ss at 1.8 using the 55/1.8 on crop or ff. So if that's high enough, no need to turn up iso.

But since 55mm a bit longer on crop, more tele, I might prefer a higher ss, and turn up iso for that reason.



Sep 13, 2017 at 01:51 PM





  Previous versions of AmbientMike's message #14180201 « Crope mode Vs Crop in post affecting Background blur? »

 




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