medd63 wrote in post #17934459
I have a question regarding the difference between these two scenarios. I have both a Canon 6D and a T4i. I am interested in taking close up photos of flowers and butterflies and bees, etc..Scenario #1:
Use my Canon 100-400mm MkI (push-pull) telephoto lens with my Kenko extension tubes (I already own both the lens and the tubes)
Get a dedicated macro lens (I'm thinking of purchasing the Canon EF 100mm f/2.8L IS). I'm trying to justify purchasing the macro lens.
Assuming I kept the 100-400mm at 100mm, what would be difference in the photos using the two scenarios outline above? Would the minimum focusing distance be radically different? Would the image captured be different (ie. would the flower be larger in one photo over the other?)
Thanks in advance for the help!
I have found these two sites, LenScore and SenScore, to be valuable tools for making purchase decisions on lenses/camera bodies.
LenScore rates each the various lenses in Resolving Power, Contrast, Color, Bokeh, Distortion, Falloff, Flair, LaCA, LoCA. They also have separate categories for Primes versus Zooms. In almost every case, even mediocre Primes invariably blow away Zooms Lenses in every category.
SenScore also rates the various cameras, for Noise, Dynamic Range, Color Range, Tonal Range, Resolving Power in each of the more popular DSLR cameras. They also distinguish between Full Frame and APS-C cameras. Full Frame cameras invariably blow away APS-C cameras in every category.
With that said, if you look at the original Canon 100-400mm zoom, it is one of the lowest-ranking zoom lenses made (5th from the bottom), with only 767 Resolving Power, 781 in Color, and 531 in Bokeh. If you slap extension tubes between this already-low-level lens and your camera, these numbers will be reduced even further.
By contrast, the Canon EF 100 mm f/2.8L IS Macro (while having a low-level rating among primes, is still far sharper than most zooms and) rates 813 in Resolving Power, 870 in Color, and 925 in Bokeh, and you don't have to slap extension tubes inbetween, so I think the choice should be pretty clear.
Now, if you are talking about the newer Canon 100-400 II zoom, you might make a different choice, seeing is this 4th from the top among zooms, with 992 Resolving Power, 947 Color, and 816 Bokeh. If you owned this particular zoom, it might not be worth buying the Canon macro.
I would bookmark these sites, as they make periodic updates, and you can see where you stand, quality-wise, with the equipment you're purchasing.