« on: January 08, 2014, 11:30:44 AM »
If you have an 18-55 that you want to use, all you need to buy is a 52mm-58mm reversing ring. Do the stop-down trick (mount the 18-55, set your desired aperture, press and hold the DOF button, then remove the lens I believe), then do the reverse mount on your 40mm.
If you are just looking for cheap macro fun, I know some folks use extension tubes with the 40mm (and possibly the 50mm 1.4) that you already have. If you buy the good Canon tubes (possibly also Kenko) you can also use them on your L zooms as well for closer focusing. The cheaper ones work theoretically but I believe some folks have had problems with the weight causing them to flex. I have the 100mm macro but I am planning on adding the extension tubes to my 40mm for that purpose.
Thanks for the reply. What would be the benefit of mounting the reversed lens to the 40mm vs directly to the camera? Yeah I will have to looks into extension tubes as well. Any suggestions of a good set of extension tubes to use for the 40mm? Thanks for the tip about using the DOF button, I think I had read that as a hack to get around lenses that don't have manual aperature rings.