Macro tubes how to

sanderscapes · 2009-04-02T00:24:40+0100

Hi everyone i saw these on ebay http://cgi.ebay.co.uk/Macro-Extension-Tube-Ring-for-Pentax-K-Mount-K200D-K20D_W0QQitemZ370132080258QQcmdZViewItemQQptZLens_Accessories? hash=item370132080258&_trksid=p3911.c0.m14&_trkparms=72%3A1761%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318 last night and wondered how good they were bear in mind they are about £7 delivered from china. So maybe they're not that good' but have done a bit of macro flower work and usually just use my sigma 50mm 1:1 macro lens.I have never used extension tubes before so could anyone please explain the benefits as i am totally in the dark on this subject. Maybe these extension tubes would be ok to practice on for a while but i don't know.:roll: any advice would be much appreciated.