3:1  ??

http://www.photosig.com/go/photos/view?id=1178401
"Eyron" <eeo@noway.com> wrote in message
news:v3V4c.1216$GJo.363@news04.bloor.is.net.cable.rogers.com...
> I have been using and loving my Tamron SP 90/2.8 1:1 and loving it.
> I read that you could rev. a 50/1.8 to get a larger than 1:1.
>
> I hand held the 50 rev. and all looks well.
> No fall off at the corners.
> All I need is the 55-52 adapter.
>
> Questions--------- 
>
> 1: Soooooo my max. mag now be 90/50= 1.8 so 1.8:1 right ??
>
>
> 2: Does the focal length mag. on the SLR (1.5) increase this ratio higher
> than 1.8:1???
>
> 3: Also if I use my Nikon 4T (2X) on he front of the rev 50/1.8 what would
> be my new max. mag.???
>
>