Why can't Nikon lenses use teleconverters? Is this a design issue or a matter of optics?
rmorrison1116 wrote:
What do you mean by this: 'btw, your D5600 already is a 1.5x multiplier...'? It's a 1.5 crop factor, not a multiplication factor.
It is the AOV or lens length equivalent. As my students used to say long ago "Same difference".
That D5600 covers what a lens 1.5x as long would on a FF.
But it puts 100% of its pixels on that subject while the FF cropped, unless it is a really extreme MP sensor puts a lot fewer pixels on the subject. For some uses it makes little difference, but for others it is a big deal.
rmorrison1116 wrote:
What do you mean by this: 'btw, your D5600 already is a 1.5x multiplier...'? It's a 1.5 crop factor, not a multiplication factor.
I understand the fine points of what's the difference, but in REALITY which is something not visited by a number of people who post here, There's No Difference! Each degrades the image a bit, but if that's what you need then get one. If you can afford more lenses, the do that.
stanikon
Loc: Deep in the Heart of Texas
speters wrote:
Of course, Nikon lenses can use teleconverters
Correction: SOME Nikon lenses can use teleconverters. As I said, I have a bag full that cannot.
Nikon, like ALL other manufacturers wants you to buy their bigger more expensive lenses where there is a larger profit margin. To that end, they reserve to design TC's to be optimally compatible only with their BEST lenses - where the best results can be obtained - and thus more rationale for the bigger/better lens purchase $$$$ ....8-)..........so YES, it is both design and optics - but being driven in the end by marketing - as are most things if not ALL things these days !
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imagemeister wrote:
Nikon, like ALL other manufacturers wants you to buy their bigger more expensive lenses where there is a larger profit margin. To that end, they reserve to design TC's to be optimally compatible only with their BEST lenses - where the best results can be obtained - and thus more rationale for the bigger/better lens purchase $$$$ ....8-)..........so YES, it is both design and optics - but being driven in the end by marketing - as are most things if not ALL things these days !
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Are you trying to say that Nikon designs teleconvertors and lenses to be compatible in ways to increase income? There are a lot of things in lens design to be considered that are unrelated to profit. Perhaps the kind of people that are satisfied with a kit zoom also want smaller lenses, so they are designed in a way to get that, but the result is also that some of the elements are at the very back of the body in some instances.
Most of the TC incompatibility issues are the result of the fact that at some conditions, there will be a tragic crash.
stanikon
Loc: Deep in the Heart of Texas
Bill P wrote:
There are a lot of things in lens design to be considered that are unrelated to profit
Economics/Cost Accounting 101:
Since Nikon is not a government entity, nothing, absolutely NOTHING, they do is unrelated to profit. If they build features into their cameras, lenses and peripherals, the retail price reflects the cost of those features. "Features" can include many things, including overall quality of the product. If they are aiming for a particular price point and the cost of the product makes it unprofitable, then they do one of two things: increase the price to a profitable level or back off of the "features" until the cost fits the desired profile.
I have thoroughly perused the TC compatibility chart; I have a couple of lenses that are equal in cost to some of the lenses in the list. None of their compatible lenses have a minimum focal length less than 70 mm. I think there is a design issue in the less-than-70 lenses that makes it impossible or impractical to fit a TC to them. I think if Nikon could make one for the shorter lenses and make money on it, they would.
stanikon wrote:
Correction: SOME Nikon lenses can use teleconverters. As I said, I have a bag full that cannot.
Just exactly what I said!!!
n3eg
Loc: West coast USA
camerapapi wrote:
...did you know that your 70-300...will be f5.6 at the 300mm range and a tele-converter will make it DARKER. Under those conditions auto focus will not be very efficient.
I found this out with a 2x TC. My Kodak SLR/14nx that uses Nikon lenses won't autofocus at all, although it tries.
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