When switching between camera systems, it’s important to understand how lens focal lengths translate across different formats. The table below shows how common 35mm (full-frame) lens focal lengths compare to medium format systems like 645, 6x6, and 6x7.

For example, a 50mm lens on a 35mm camera gives a similar field of view as a 75mm lens on a 645 format, an 80mm on 6x6, or a 100mm on 6x7. As the format size increases, you’ll need a longer focal length to achieve the same framing and perspective.

This conversion is crucial when planning for portrait, landscape, or travel photography across different types of cameras. Understanding these equivalents helps ensure you get the composition you expect, no matter the gear you’re using.

Lens Equivalents for Various Formats

Full table available, read more.