Quote:
Originally Posted by musab
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The doubled objective has a Diffraction Optical Element (DOE) at it's rear surface - a so called Freshnel lens..........
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Ah... I suspect that would be a
Fresnel lens.... or maybe Woolies have lenses in their fruit department these days????
BTW Canon also use a similar element in their DO series lenses... which are OK (very compact is the selling point) , but not quite as sharp as, say, an aspheric L-series.