Misinformation about m4/3

Started Feb 14, 2014 | Discussions thread
Marty4650 Forum Pro • Posts: 14,867
Re: Tom, easy solution

Sean Nelson wrote:

Now you may disagree with this use of the phrase "crop factor". But if that's the case, then I have to ask you what other term would you use to describe the relationship between various sensor sizes and the fields of view of lenses used on them?

I suppose you mean "equivalent focal length" because there is no crop factor when you use a M4/3 lens on an M4/3 camera. There is also no crop factor when using a Pentax Q lens on a Pentax Q camera, and so forth.

The only time a "crop factor" means anything is when you use a lens on any camera that wasn't designed for that lens. The image circle will be the wrong size for that sensor.

The EFL is only mentioned because most people were conditioned to think of focal length in terms of their 35mm film cameras. And now that the notion has become standardized, even people who never have used a 35mm film camera will think in terms of FF being the standard size, and everything else being "relative to FF."

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