Focus question and advice please!

Started 2 months ago | Questions thread
JimKasson Forum Pro • Posts: 24,880
An example

Here's a set of curves that I just worked out that approximate your situation.

I plotted the size of the blur circle vs distance for four f-stops, assuming a sensor with the pitch of the GFX's and 100% fill factor (a little high). I assumed the lens was perfect (not even diffraction) and was focused at 30 meters.

You can see what happens to the blur circle as the subject gets close.


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