how reproduction ratio works?

Started 4 months ago | Questions thread
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Rain13
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how reproduction ratio works?
4 months ago

Hello,

I was curious how I should understand reproduction ratio. Does reproduction ratio 1:1 at 100mm focal length give the same image as reproduction ratio 1:2 at 200mm focal length? If not than what would be different?
Sigma F1.8 18-35 mm has only 0.23x maginification.
http://www.dpreview.com/lensreviews/sigma-18-35-1-8
Will I have any troubles with that lens because of that little magnification? I mean if I want my images to be crisp sharp with lot of details, will that low magnification be obstacle?

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