Finally the time was right (i.e. the light was good enough) to go and crawl into my Siberian Iris with the reversed lens at 55mm held to my camera, like I said I would do as soon as the moment would come. Here you are: 1. 2. 3. 4. 5. 6. To use the reversed lens at a shorter focal length I would need to have even more light ... today I wanted to be on the safe side with the 55mm.