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Old Dec 30, 2011, 2:37 PM   #11
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G'day all

It is my understanding that these 2 lenses [ Canon D500 & Panasonic LC55 ] are identical 2-element lenses of +2 Dioptre power and thus have identical optical characteristics

-ANY- close up lens of +2 Dioptre power will have an inherent focal length of 1/2-metre ... take it off the camera & let it focus the sun onto a piece of paper > it'll be at 1/2-metre distance

When you install -any- closeup lens onto -any- camera lens the focus ranges available will be...

camera focus ................ Close-up lens focus
.................................... +1 ..... +2 ....... +3 ...... +4
infinity .......................... 1m .... 1/2m .... 1/3m ... 1/4m
1-metre ........................ 1/2m .. 1/3m .... 1/4m .. 1/5m

The enormous 'beauty' of a close up lens is that you can put it onto -any- camera lens especially long zoom lenses and have them focus both very close to you -and- also you still have 100% of the zoom available to alter image size

It matters not whether you use this lens on your 18x zoom panny or a 70-200mm for a dSLR ... a +2-dioptre lens combo will refocus to 1/2-metre

Depth of Field still comes down to aperture used and the good old 'Circle-of-Confusion' which is the topic for another discussion

Hope this has not "confused" you
Regards, Phil
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Old Dec 30, 2011, 4:20 PM   #12
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Agree with Phil (great info, by the way) that the Canon D500 and LC55 should be identical, and they are both very good quality lenses. I don't think the Raynox150 is quite up to par with these 2.
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