Can someone Explain Extension Tubes please

[whitey]

basically what there sued for, pro's and con's etc

heard of them and seen a few used but thats about it, not seen pics with them so no idea on pro's and con's

thanks in advance

 

[birdy961]

Hi Whitey

This may help

http://en.wikipedia.org/wiki/Extension_tube

Also if you do a search on these forums there are quite a few threads

 

[whitey]

ah thanks for that

dont think i need them, just wanted to know what they do etc