(10-03-2019, 11:53 AM)toni-a Wrote: https://petapixel.com/2019/10/01/full-fr...omparison/
Larger sensors have shallower DOF due to the longer focal used...
And for DOF large format is still unrivaled...
No, larger sensors do NOT have shallower DOF due to longer focal used <sic>...
Larger sensors have the SAME DOF when you use the SAME aperture size
. if you use a BIGGER aperture size
on larger sensors, you get more shallow DOF with those larger sensors. If you use a SMALLER aperture size with those bigger sensors, you get less shallow DOF with those larger sensors.
"And for DOF large format is still unrivaled.."
What does that mean??? DOF is not saying anything.
You must mean "shallow DOF". And then it just depends on which lenses are actually available. My 6x9 camera has a 105mm f4.5 lens. That makes it equivalent to something like a 44mm f1.9 lens on FF ( FF crop factor something like 2.4). You can easily rival that 6x9 camera where shallow DOF is concerned with a 50mm f1.8 lens like a cheap Canon EF 50mm f1.8 STM.
The guy of the video appears to confuse "aperture" with "f-stop". With the same aperture, you get the same DOF.
f4 is not "an aperture". It is: "focal length divided by 4 gives the aperture diameter". With 100mm focal length, f4 means 25mm aperture. With 40mm, f4 means 10mm aperture.
So, to conclude: if you have a BIGGER aperture available for some format (using the same FOV), you get more shallow DOF for that format. If you have a bigger aperture available for 4x5 large format, you do get a more shallow DOF.