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| p.1 #8 · What is the difference between Canon 1.4v II & 1.4 VIII??? |
From my perspective there is VERY little noticeable image quality difference - certainly not worth the additional price, at least not to me.
Construction-wise, the 1.4v II has four screws on both sides holding it together, the 1.4v III has four screws on one side, seven on the other. I am guessing Canon saw a little deformation on the one side and added some screws. Not a big thing to me either as I don't own any super tele lenses and I treat my equipment carefully.
I agree with what is quoted above. I know that, when we spend money, we like to believe that it has been money well spent, but, of all of the 10s of thousands of dollars worth of equipment that I've spent money on, the $500 that I paid for my 1.4x III, even though it was one of my least expensive equipment purchases, is one of the ones for which I feel like I wasted my money. There may well be optical improvements between my 1.4x II and my 1.4x III, but, if there are, they are small enough that I would never notice them in looking at a print or at normal viewing sizes on the screen. When I go out shooting now and want to take a 1.4x with me, I don't even pay much attention to whether I'm grabbing the version II or the version III.
Also going along with what I quoted above, for me, the most significant potential improvement in the version III is the beefed-up mounting hardware with the extra screws on the mount. I have previously had a 1.4x II that did suffer from deformation in the mount to the extent that Canon was not able to satisfactorily repair it. With the beefed up mount, I'm hoping that such deformation will be less likely with the version III.