Originally posted by cgoudie I'm confused about this. Why when in macro settings?
Of the times that I need SR, this is probably one of the largest if I'm handholding the picture. Does the SR just not work well with macro?
In another thread here on IS/SR, Falk says that SR doesn't work (well?) within one focal length, which is where macro action occurs. And Falk seems to have studied the technology, so I'd take his word there. But just to be sure, I'll do some tests tomorrow. (After I try to repair a lens I 'fixed' too well today. Duh.)
I've seen and promulgated calculations that the effective focal length of an extended lens, a factor in figuring the magnification, is: EF = FL+EX or, add the focal length to the extension amount. So a 100mm lens with 50mm of extension for 1:1.5 magnification is effectively 150mm long. And a 50mm lens on 50mm tubes for 1:1 mag is effectively 100mm. Plug that into the SR robot and try some shots. Then turn off SR and shoot again. Then it's pixel-peeping time.