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90mm on FF is the same as 60mm on APSC (1.5x) is the same as 225mm on 6x9 is the same as 310mm on 4x5
Effective depth-of-field is the only thing that changes if the aperture is kept constant with all sensor sizes.
It's basic physics.
Why the fuck are there people saying 60mm on APSC is not the same as 90mm on FF (or a variant like 24mm on APSC is not the same as 35mm [hurrdurr 36mm] on FF etc), please educate yourself (if you don't already know) and those around you that this is how focal-lengths work. You can crop (centred-frame crop) to achieve an effectively higher focal-length.
Thank you.
Effective depth-of-field is the only thing that changes if the aperture is kept constant with all sensor sizes.
It's basic physics.
Why the fuck are there people saying 60mm on APSC is not the same as 90mm on FF (or a variant like 24mm on APSC is not the same as 35mm [hurrdurr 36mm] on FF etc), please educate yourself (if you don't already know) and those around you that this is how focal-lengths work. You can crop (centred-frame crop) to achieve an effectively higher focal-length.
Thank you.
