1:1 MACRO understanding .. (on m4/3)

[PhotoTeach2]

I understand that a 1:1 macro lens on FF can (full-frame) image a subject 1"x1.5" ...

What is smallest-subject size w/ 1:1 macro on a m4/3 camera ??? (Is an assumption of 1/2"x3/4" correct ???)

 

[Tom Axford]

I understand that a 1:1 macro lens on FF can (full-frame) image a subject 1"x1.5" ...

What is smallest-subject size w/ 1:1 macro on a m4/3 camera ??? (Is an assumption of 1/2"x3/4" correct ???)

At 1:1 magnification, the subject size and image size are the same. The image size is the sensor size on a digital camera, typically 17.4 x 13mm for Micro Four Thirds cameras, most of which are 4:3 aspect ratio (a few have multi-aspect ratio sensors, which complicates matters somewhat).

 

[dbateman]

Understanding 1:1 macro is easy.

Just photograph a ruler. You will see in your image the exact number of ticks on that rule as the exact width of your sensor in the image when you are at 1:1.

 

[QuietOC]

Small sensor digital compact camera manufacturers often give equivalent magnification in their specs. They don't give their lenses' optical magnification. I don't know if that has ever been done for an interchangeable changeable lens camera. There are no macro lenses in the Pentax Q system for instance. Q cameras are an easy way to get really small pixels behind lenses.

 

[PhotoTeach2]

What is the smallest subject-"size" w/ 1:1 macro on a m4/3 camera ???

(Is an assumption of approximately 1/2"x3/4" correct ???)



From what I see .. I am still assuming approximately 1/2"x3/4" is correct ???