Hi all,
I understand the crop factor with a film based lens on a digital body (1.5 1.6 etc)
But, when a lens is made as a digital lens. as for the 4/3rd system,
where there is a standard mount and a standard sensor size.
Why is there still a crop factor ?
Why is a lens marked as 40mm to 150mm not really 40 to 150, but 80mm to 300mm.
I thought that if a lens was designed to put the image on a pre set area, there would be no crop unless you changed that area.
Can someone put my mind to rest on this one ?
Thanks all in advance for sharing knowledge.
I understand the crop factor with a film based lens on a digital body (1.5 1.6 etc)
But, when a lens is made as a digital lens. as for the 4/3rd system,
where there is a standard mount and a standard sensor size.
Why is there still a crop factor ?
Why is a lens marked as 40mm to 150mm not really 40 to 150, but 80mm to 300mm.
I thought that if a lens was designed to put the image on a pre set area, there would be no crop unless you changed that area.
Can someone put my mind to rest on this one ?
Thanks all in advance for sharing knowledge.