Pentax smc FA 50mm f/1.4

Q: My question is not on this page? A: Ask it in the URL, for example /ask/what-is-the-pentax-smc-fa-50mm-f-1-4-good-for. Any question written as words after /ask/ works.

Prime lens

A prime lens by Pentax for Full frame cameras, 50mm f/1.4.

What it frames like

Its full-frame-equivalent focal length on the sensor it was made for.

How wide 50mm sees on each sensor it covers.

f/1.4 wide open, to scale against f/1.4.

On full frame (Pentax K): as marked, 50mm.
On APS-C (Pentax K): like 75mm on full frame; f/1.4 gives about the depth of field of f/2.1 there.

See what it frames: its view on the Pentax K-3 Mark III Monochrome at any distance, and its depth of field, drawn to scale.