macro questions

shioks76 · 26th January 2005

some lenses have a rating of macro 1:1. No zoom lense life size
while other lenses offer like 28-300 with macro 1:3.
what does 1:3 mean? That the object will be magnified by 3 times the life size?

If thats the case, interestingly the 1:1 dedicated macro lense tends to be more expensive then the telephoto with macro capabilities why is that?

moos blues · 26th January 2005

1:3 is 1/3 life size, not 3 times.

Dedicated 1:1 macros are expensive as, its hard to get lenses to give u that accurate 1:1 ratio...

a tele macro zoom like 75-300 Sigma, APO Super macro II, will give u 1/2 life size which is less magnification then a dedicated macro.

macro lenses tend to have very very good optics as they need to pick out detail.

26th January 2005	#1
shioks76 Member Join Date: Jan 2005 Location: sengkang Posts: 70	macro questions some lenses have a rating of macro 1:1. No zoom lense life size while other lenses offer like 28-300 with macro 1:3. what does 1:3 mean? That the object will be magnified by 3 times the life size? If thats the case, interestingly the 1:1 dedicated macro lense tends to be more expensive then the telephoto with macro capabilities why is that?

26th January 2005	#2
moos blues Member Join Date: Nov 2003 Location: Pasir ris Posts: 681	1:3 is 1/3 life size, not 3 times. Dedicated 1:1 macros are expensive as, its hard to get lenses to give u that accurate 1:1 ratio... a tele macro zoom like 75-300 Sigma, APO Super macro II, will give u 1/2 life size which is less magnification then a dedicated macro. macro lenses tend to have very very good optics as they need to pick out detail.