Equivalent focal length for MFT lenses

Started Apr 12, 2013 | Discussions thread
draleks
Junior MemberPosts: 48
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Re: Equivalent focal length for MFT lenses
In reply to s_grins, Apr 14, 2013

s_grins wrote:

draleks wrote:

There is a lot of talk about comparing lenses for MFT with APS or full format lenses. So I want to check if the following comparison is correct. If I have an MFT 300 mm f/6.7 lens, and a full format 600mm f/6.7 lens that is of a worse manufacturing quality and just happens to be twice as soft as the MFT lens. Then, on equal ISO values, those two lenses will be an exact match. Right?

Firstly, let me remove all the BS:

You have MFT 6.7/300 attached to MFT camera, and you have FF 6.7/600 attached to FF camera. Now, you're taking shot from the same spot with both cameras.

1. you will get the same FOV

2. If you set the same F stop and shutter speed, you will get the same IOS.

3. If F stops are the same, DOF will be 4 times deeper on M43

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