06-22-2014, 08:04 AM
Every TC bites a piece off IQ. Some a very small one, others noticeably and as they change the whole system, your idea was in fact a stroke of genius. Is that combination appearing as a separate position in the AFMA register?
I certainly agree, the D800 has enough reserves to crop as if a 1.4× TC is used - without the additional downside that the shortest FL with converter might not be short enough, but that depends if the situation needs it.
Now, this could be the answer for Mark, too. Just think of the possible combinations with TC of all lenses Photozone already tested. Canon offers two Extenders, Nikon 3, Sigma another 2 and I'm sure there are more 3rd party products which "should be tested, because this combination is so perfect...". It's always easy to ask for tests - at least, easier than doing them. With some of the devices one looses quite a bit of comfort - AF not possible, and not every body-TC-lens combination will let the camera's AF work properly. And of course, zooms need to be tested at different FL - the workload you're asking for is exorbitant. And getting the results and saying, we did it, but no combination was better than the prime? I don't know, I rather see the testers being happy than bored ^_^
Except the ones some long lenses have in the package as standard accessory and are meant for just this lens, the rest of them is sort of a deal.
In another post Klaus mentioned it's pretty difficult to test a 600mm as the whole stability of tripod, tripod collar, camera-shutter and aerial pollution starts to become difficult to control.
Sometimes I was on the edge of getting a converter. My colleague, a "birder" always asked me "are you sure you want to carry it and change one more thing between lens and body?" He has all three TCs, so a grain of wisdom will be in his question.
I certainly agree, the D800 has enough reserves to crop as if a 1.4× TC is used - without the additional downside that the shortest FL with converter might not be short enough, but that depends if the situation needs it.
Now, this could be the answer for Mark, too. Just think of the possible combinations with TC of all lenses Photozone already tested. Canon offers two Extenders, Nikon 3, Sigma another 2 and I'm sure there are more 3rd party products which "should be tested, because this combination is so perfect...". It's always easy to ask for tests - at least, easier than doing them. With some of the devices one looses quite a bit of comfort - AF not possible, and not every body-TC-lens combination will let the camera's AF work properly. And of course, zooms need to be tested at different FL - the workload you're asking for is exorbitant. And getting the results and saying, we did it, but no combination was better than the prime? I don't know, I rather see the testers being happy than bored ^_^
Except the ones some long lenses have in the package as standard accessory and are meant for just this lens, the rest of them is sort of a deal.
In another post Klaus mentioned it's pretty difficult to test a 600mm as the whole stability of tripod, tripod collar, camera-shutter and aerial pollution starts to become difficult to control.
Sometimes I was on the edge of getting a converter. My colleague, a "birder" always asked me "are you sure you want to carry it and change one more thing between lens and body?" He has all three TCs, so a grain of wisdom will be in his question.