maths/optics help please..

Started May 18, 2012 | Discussions thread
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realsand
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maths/optics help please..
May 18, 2012

Hi! How does 200mm at 1m distance compare to 45 at 0.5m distance, regarding magnification?
How much larger will for example a flower appear?
I make it about 4.5/2=2.25 times larger - is that correct?

 realsand's gear list:realsand's gear list
Panasonic Lumix DMC-GX1 Panasonic Lumix G 20mm F1.7 ASPH Olympus M.Zuiko Digital 45mm 1:1.8 Panasonic Lumix G X Vario PZ 14-42mm F3.5-5.6 ASPH OIS
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