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i am very happy with my kenko one on all my lenses and testing the 1.4 I found stopping down one more stop from the new wide apperture yields equivelant IQ to the native lens widest apperture ie 70-200 f2.8 put the Tc on at 280mm f5.6 IQ is the same as at 200 f2.8
and it works on all lenses great on the 50 f1.4 to give it a little more reach too
I think another person on this site once pointed out that they like refurbished lenses because they know they've been checked out and brought up to specs individually, while a new lens may get only a cursory once-over on the production line. I don't know if that is true or not, but it makes sense to me.
On another topic:15% would be an even better bargain if Canon would not slap sales tax on the final invoice value... BH/ Adormama etc are cheaper cause they don't put sales tax on top when shipping to Indiana.
Canon has no choice but to charge sales taxes on their products. Don't blame them. It's the law. Amazon and other sellers can avoid charging sales taxes because they have no physical presence in your state. But, just so you are aware, you probably owe the taxes anyway and while most states don't do a good job of auditing these purchases, that is changing.
Neuro... have you stacked the 1.4 + 2x on the 70-200mkii ?
No, I haven't tried that (yet). I can, if there's interest. I've been considering doing a comparison set between 70-200 II with single and stacked TCs, 100-400mm with single TCs, and then cropping everything to the same FoV (equivalent to the longest, i.e. 100-400 + 2x), in decent light (unlike the one time I tried the 100-400+2x), and seeing which gives the best results...
I can hear it now!
"And with this 35 megapixel compact body you only have to point it in the general direction of the target and you can later crop down to a 18 megapixel image, just like the 1DX body!!"
About 6 years ago, the air conditioning on the roof of the building I was working in had a problem with a bearing. It produced a very high pitch noise that I could hear and gave me a headache but nobody else in the office could (I was the youngest...)
Dare I ask what your thoughts are on 96kHz audio? I've got a few SACDs and the appropriate equipment to deliver 192/96 to the amp and out of the speakers...
Exactly! I suspect that if a 5DX were to have a foveon style sensor with colours arranaged vertically rather than in a horizontal 2x2, we'd find companies doing the Sigma thing and calling a camera with 15MP a 45MP camera.
One of the problems with very tiny photosites is the narrow angle of view of each photosite. Those toward the outer edges have a real issue trying to get light due to the angle of the light rays.
If the maximum resolving power of the current L-series lenses is around 45MP for full-frame 35mm cameras then when the MP count exceeds 90MP is when we have too many MP. Why 90? Because at that point we've got enough resolution to properly sample the light and give clear definition to the 45MP worth of detail.
Kind of like how the music on CDs is sampled at 44khz, whereas the human can't hear much over 22k. The higher sampling gives better definition to what can be heard.
They are $2374 today, so you got good deals.