Extender tubes

patlike 2 Apr 2006 11:10:28 920 posts
Seen 14 years ago
Registered 18 years ago

I've got no experience of these at all, but how would something like this affect image quality? Looking at the prices of longer lenses, I could really do with a cheaper way of getting closer to subjects than shelling out multiple thousands of pounds.

brains 2 Apr 2006 11:29:50 491 posts
Seen 11 years ago
Registered 16 years ago

I think they have a negative effect on the amount of light getting through the lens to the degree of the extension. So a 2x extender will make you f4 lens an f8 lens at best as I understand it, which can make em a bit useless unless you have a really good tripod.

edit: the degree of light reduction may not be as bad as I said, but it will cut it down!

Edited by brains at 11:32:00 02-04-2006

patlike 7 Apr 2006 12:26:11 920 posts
Seen 14 years ago
Registered 18 years ago

Sorry, didn't see this. Cheers, I think I'll give it a go.

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