dsiglin
TPF Noob!
- Joined
- Jan 10, 2012
- Messages
- 266
- Reaction score
- 73
- Location
- Greenville, SC
- Can others edit my Photos
- Photos OK to edit
This much I know: When you take a 50mm full frame lens and put it on say a Sony APS-C mirrorless you have the field of view equivalent of 75mm lens on full frame.
Here's my question: Those full frame lenses are designed to cast a wider circle of light than the APS-C sensor. This is why you get a narrower field of view. But what about a lens designed for APS-C? The image circle it produces is more focused/smaller than the full frame lens. Would that not mean a 50mm APS-C lens has an actual 50mm field of view? In my mind that makes sense but when I see APS-C lenses advertised they often state "equivalent to 75mm on full frame). What am I missing?
Here's my question: Those full frame lenses are designed to cast a wider circle of light than the APS-C sensor. This is why you get a narrower field of view. But what about a lens designed for APS-C? The image circle it produces is more focused/smaller than the full frame lens. Would that not mean a 50mm APS-C lens has an actual 50mm field of view? In my mind that makes sense but when I see APS-C lenses advertised they often state "equivalent to 75mm on full frame). What am I missing?