Macro Magnification

[matthewchj]

I recently bought a Canon 100mm Macro lens. The lens is listed as having a magnification of 1x. However, if I attach it to a camera with a 1.6x crop like my 350D, does it become a 1.6x Macro lens?

[Saralonde]

The magnification should remain the same. Basically the crop factor means it will crop the size of the picture. You will notice the biggest difference in this if you take a wide angle shot. Here is an explanation of crop factor: http://www.the-digital-picture.com/C...op-Factor.aspx

[matthewchj]

OK thanks for your help

[wulf]

As I understand it, a true macro picture is anything that displays at a ratio of 1:1 or larger on the camera sensor. I took some pictures of a ruler and (comparing how many mm I could see against the size of the sensor) established that, using my Raynox adapter at the 55mm end of my kit lens, I could only manage 1:2... but that's enough for now!

Wulf