"Macro" lenses that aren't Macro
Oct 27, 2012 10:48:58 #
OK. By definition a Macro lens is Prime and the image on the sensor is the same size as the object. On an APS-C crop sensor, that ain't very big.
So, why is my Tamron 28-300 and my Sony 75-300 labeled as "Macro"? That has always baffled me.
I appreciate your feedback.
Jim
So, why is my Tamron 28-300 and my Sony 75-300 labeled as "Macro"? That has always baffled me.
I appreciate your feedback.
Jim
Oct 27, 2012 12:18:32 #
Just because it will focus closer that a normal lens, but not as close as a dedicated macro lens.
Oct 27, 2012 12:29:26 #
Partly marketing. In the same way that many camera models are advertised as having digital zooms when it's really in-camera cropping.
Oct 27, 2012 13:49:20 #
You are correct in describing true macro as 1:1 magnification (life-size). Unfortunately, many lens manufacturers, especially non-camera companies, inscribe the word "Macro" on some lenses, just to sell more glass. Close-up does not equal macro.
From Tamron website: http://www.tamron-usa.com/lenses/prod/28300_vc.asp (Specs page)
Macro Magnification Ratio = 1:3 (at 300-mm, MFD of 0.49m)
From Tamron website: http://www.tamron-usa.com/lenses/prod/28300_vc.asp (Specs page)
Macro Magnification Ratio = 1:3 (at 300-mm, MFD of 0.49m)
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