Re: Nikon Teleconverters
On 9/12/2012 4:20 PM, Floyd L. Davidson wrote:
> Eric Stevens <firstname.lastname@example.org> wrote:
>> I seem to recall that the 1.4 times was judged not too bad and so to
>> was the 1.7. However the 2 times was regarded held to visibly degrade
>> the image for pixel peepers. Am I correct.
> At a minimum, each TC magnifies lens aberrations by the
> same amount it increases the size of the image. Hence
> you can expect any 2X TC to degrade the image more than
> would a 1.4X TC on the same lens.
> Just as true, the more aberrations any given lens has
> the more they will be visible when using a TC of any
> given magnification.
> All that said, Nikon makes TC's that are optically as
> good as any. For the 1.4X that is unlikely to make any
> difference, and that may also be true when comparing to
> other optically good TC's (Kenko's 2X PRO DGX is
> virtually as good).
> The big difference is not optical quality, but the
> quality of build and the functionality. Nikon's
> TC20EIII is built significantly stronger than the Kenko
> 2X; however, the Nikon TC will not mount or work with
> AF-D lenses that require the on camera focus motor,
> while the Kenko will.
>> I am considering using one on my 70-200 f/2.8 zoom. Does anyone here
>> have any experience with any of these?
> If you have the 70-200mm f/2.8 VRII, either the Kenko or
> the Nikon TC's are all great (given that Nikon has a
> better build quality).
> I've not personally used the older 70-200mm f/2.8 VR
> lens and cannot vouch for how well it works with a TC.
> But on a DX body you can be almost certain that even the
> 2X TC's will provide acceptable results.
> And there is no comparison to the mirror lens you
> mentioned in a later post. It will sell cheap for a
> very good reason.
Have to agree with that, having borrowed a 500 mirror back in the good
old film days - didn't exactly get any good images, even with it bolted
down on a tripod.
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