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First impressions on Oly 30mm macro

Started Jun 4, 2017 | Photos thread
Okapi001 Veteran Member • Posts: 5,145
Re: What x1.25 magnification looks like in practice
3

Tommi K1 wrote:

Wrong.

One does not apply crop to lens optical magnification.

1:1 is 1:1 regardless of the sensor size.

1:1 is macro magnification. 8x10" field camera has face size macro, 17x13mm has 17x13mm macro.

It is always about reproduction to the life size front of the lens and sensor/film.

1.25x is 1.25x regardless of anything else.

Well, you are wrong. It's like saying 50mm lens is a 50mm lens, regardless of anything else. Technically true, but  it means nothing if you don't know the size of the sensor. 1:1 on a m4 /3 will get you the same image as 2:1 on a full frame.

With a 1:1 lens on a m4/3 sensor you can fill the frame with a 17mm long butterfly, and if you want to fill the frame with the same butterfly on a full frame camera, you will need a lens capable of 2:1 magnification.

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