Sony 20mm F/2.8 only gives 30mm in APS-C camera?

Started 4 months ago | Discussions thread
mcslsk Veteran Member • Posts: 6,314
Re: Sony 20mm F/2.8 only gives 30mm in APS-C camera?

Invanovich22 wrote:

idsurfer wrote:

Invanovich22 wrote:

I know on APS-C sensors there you have to multiply actual focal range by crop factor which is 1.5 so 20mm optics really is 30mm?

In specs they say same thing "35mm equivalent focal-length (APS-C)30mm"

Yes, 20mm on aps-c will be 30mm FF equiv.

I am confused why they label it 20mm then?!

Because the focal lenght is 20mm - on APS-C, FF, and any other sensor format. The resulting field of view depends on the sensor. You get used to that quickly and after a while won't think about it anymore.

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