macro


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maddog

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Feb 13, 2002
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Alexandra
maddog.clubsnap.org
#1
How do you convert 200mm, 1:4 mag ratio to 1:1 terms. I just want to know what my half-XXXX 28-200mm 1:4 macro lens is equivalent to in terms of a true macro lens. Does this make sense?
 

#2
for ta 200mm lens to get 1:1 for non-IF lens:
=> length of extension tube to add-on=200mm minus max extension at closest focus

i.e. if your max extension at closest focus is 85mm, then u need to add on another 115mm of extension tube to get 1:1.
 

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