>>2855876not very effective, the difference between each lens isn't considerable, you will waste time thinking about which lens if best for your shot
you need to widen the focal difference so that you can't simulate the next focal length by cropping the shorter one
I believe better combinations are:
28mm, 50mm, 105mm - for quick shooting, minimal cropping might be required
35mm, 85mm, 135mm - best when you can take time to position your shots, no cropping should be required
20-24mm - 50mm - 135mm - widest range, no need to position yourself for your shots, you can be as close or far as you want, but moderate cropping will be required
