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Old May 19, 2006, 4:52 PM   #1
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Hi

I have just seena close up lens online and i was wondering wat is the diff between this and a close up filter.?

The close up lens is a Canon 55mm close up les 450, and im wondering how this would compare to my close up filters combined (+2 and +4) together?

or is this just another terminology for close up filter?



thanks

ken



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Old Jun 20, 2006, 8:20 AM   #2
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Hi Ken,
I just wanted to "kill" one of these unanswered threads in this forum.

There are no close up "filters". Manufacturers use this word, but there is nothing filtered by theses lenses. The simply use the same thread as filters.

The canon 450 is a close up lens of 2.2 diopters = 450mm focal length.

To my best knowledge, these Canon lenses are achromats:
240, 250D, 500D (D=deluxe)
These are non achromats:
250, 500

But I am not quite sure about the 450, some say it is an achromat others don't.
....

regards Sven

http://www.geocities.com/seemolf/ach...achromats.html

kenmck15 wrote:
Quote:
Hi

I have just seena close up lens online and i was wondering wat is the diff between this and a close up filter.?

The close up lens is a Canon 55mm close up les 450, and im wondering how this would compare to my close up filters combined (+2 and +4) together?

or is this just another terminology for close up filter?
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Old Jun 20, 2006, 3:07 PM   #3
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woow
i thought this thread wwas dead and burried

thanks for tht mate, i will look at tht link shortly

ken
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