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General photography questions and answers Discuss 8mm 18mm what does the mm mean?...Hi all just got my new 8mm and made me think what does the mm mean?...

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Old 30-06-2007, 19:03   #1 (permalink)
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8mm 18mm what does the mm mean?

Hi all just got my new 8mm and made me think what does the mm mean?
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Old 30-06-2007, 20:02   #2 (permalink)
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Re: 8mm 18mm what does the mm mean?

Its millimetres?
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Old 30-06-2007, 20:47   #3 (permalink)
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Re: 8mm 18mm what does the mm mean?

Hi i know its mm but what does it mean is it the size of the lens from point a to b? if you get what i mean
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Old 30-06-2007, 21:08   #4 (permalink)
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Re: 8mm 18mm what does the mm mean?

Oh...yeah that makes more sense

I'm not sure but I think it must be the distance between two pieces of glass inside the lens, i've never really thought about it!
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Old 30-06-2007, 21:13   #5 (permalink)
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Re: 8mm 18mm what does the mm mean?

try this Dave Focal Length and F-Stop Explanation
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