DSLR lens

[greatfish11]

I started with a 35mm film camera in the 70's. I recently bought a DSLR. With a 35mm film camera the 1:1 lens was 50mm. My question is for DSLR what focal length is equal to 50 mm on a film 35mm SLR?

 

[Scatterbrained]

If you have a "Full Frame" DSLR it's the same size. If you have an APS-C it's about 30mm.