Ultra micro nikkor: Reverse it or not for 1/10 reduction?

[gratings]

Hi, I just won an ultra micro nikkor 28mm/1.8 on ebay. The seller says the best way to employ it for 1/10 reduction is to reverse it on a medium- to large-format camera, but use it normal for 10:1 (10x) photography. Is this correct? Thanks a lot!

 

[hobbes28]

Yep, that's correct. That is a technique also called reverse lense macro photography. They even make brackets for you mount a lens on backwards to your SLR to do the same thing or you can get a reversing ring that has threads on both ends so you can attach one lens to another at the fronts so one is backwards and the other shoots through it. Here's a tutorial I did a while back on how to do this.