Macro shots with coupler tried n tested?

[KO_300D]

hey guys,

I've seen some fantastic shots taken by using a 'coupling ring' and reversing the lenses... so I want a go too!

The thing is, I can't find many places that give detail on the coupling ring I will actually need with regards to size, brand etc, so I was hoping maybe you guys could help me out. I also need advice if possible on what lenses are better suited to this purpose, as I currently own two, as follows, and was planning on coupling these together;

EF 18-50mm 3.5-5.6 (filter size 58)
EF 55-200mm 4-5.6 (55)

any suggestions/advice?
I'm planning on getting a standard 50mm lens soon, probably a f1.8 if this helps at all

Thanks

[KO_300D]

doh
damn smileys...
that was actually a 58 in brackets

[JZaun]

Go to critique corner and check out " My first rev lens macro" .CDS gives a how to.

JZaun

[helmus]

Hi 300D,
Have a look at this site.
Sorry, not why, only what you can use is illustrated.
Normally you have to use a reversed Lens only on a Bellow,
whensoever the distance between Lens and Object is smaller
than the distance between Lens and Film (Sensor).
It's difficult to explain "why" in few words (with my basic English).

Regards
Helmut

http://www.novoflex.com/english/html/products.htm