Originally posted by Moggman If you use the reversing rings, do you lose control of the Aperture? my 70-210 has an aperture ring on it, so I could control it that way, but I was just wondering for reference.
If you use a long lens you negate much of the macro capability. Remember you are reversing the lens so everything is reversed. A long lens that normally zooms in to a subject will do the reverse mounted backwards. The most common lens to use is a 50mm. Partly due to weight and the wide aperture they offer.
You can still use the aperture to try and control DOF but that is somewhat limited.
I would never mount a reversing ring on a long lens that is usually heavier. You risk damaging or breaking the filter threads on the lens with so much weight so far from the reversed mount. The filter threads were designed for a lightweight filter not the entire weight of the lens.
Another good lens to try would be the F series 35-70 or 35-80. Both are fairly light and will offer some ability to vary the magnification and frame the shot.
Here's another DIY project. I offer it because maybe you can't find a reversing ring for a particular filter size or like me you're just cheap and want to try something new without spending any money before knowing if it will work. Note: he suggests breaking the glass of the filter to remove the glass. That's not required with many filters. If you look closely on many, you'll see they use a "C" clamp or split "O" ring to hold the glass in place. Use a small screwdriver and the glass comes out easily. Save those old scratched filters and you can use them as a stacked set as a hood as well.
- Sometimes these DIY things are cheap and handy and no I don't have any Duct tape on my camera and I don't use a stick with a screw as my monopod! Lol
DIY - Reverse Macro Ring | DIYPhotography.net