Discussion in 'Beyond the Basics' started by CThomas817, Sep 27, 2018.
Right... your lens just has to have it!
Thank you for understanding my question!!
At 15 feet an 85mm at f2 has enough DOF to capture all you need to get a face in focus and then some. The field of view will of course be different than a 200 at 30 feet.
Remember, DOF is calculated as the zone of acceptable sharpness based on the circle of confusion for your sensor.
Here is a screen shot when I plugged in the values you gave me. As you see, the total DOF is only .54 feet, so your subject's thickness should be only about 6 inches. (joke) Obviously nobody is that thin, so you'll get some blur at the back of her head.
It's been a while, but I thought I had read it had better sharp to soft transition, a bit mushier blur, and a little sharper where in focus. But yeah, marginally at best probably not the best example to pick. But comparing the 50mm 1.8g and a 58mm 1.4g...
These are for a DX sensor, the OP is using an FX sensor, different CoC calculation.
Oh, right you are! My mistake. Anyway, she can run the calculation herself.
I did that for him in post #39.
Herself... and thanks so much! The DOF calc was what I needed!
Oops! Sorry for the gender error.
Separate names with a comma.