35mm 1.8 & extension tubes
The reproduction ratio achievable with extension tubes is determined by the ratio of the focal length of the lens to the length of the extension tubes. Maximum tube length with the Kenko tubes is 68mm. Therefore the reproduction ratio is 68/35=1.94x lifesize. You will therefore lose approximately 2 stops of light.
has any one tried the 3 set tenko extension tubes on a 35mm 1.8, if so what were the results.