400mm f5.6 lens vs 200mm f2.8 lens with 2x teleconverter

"George Preddy" wrote in message
om...
Get the Simga 70-200 EX, all the 70-200 class lenses rate the same
optically, and the Sigma is much better built and much less expensive
than the plastic Nikon...

http://www.photozone.de/2Equipment/easytxt.htm#Ztelef

Also the Sigma 1.4X TC has almost no image degradation at all, using
it is not noticable. The others' TC's degrade image quality
dramatically, much like the Simga 2X.

Also, the Sigma 80-400 OS is much sharper than the 70-200 EX at 200mm.

But I'm wondering about quality or other detrimental effects of using
the
teleconverter. I've never used one before. Will the image sharpness,
contrast, colour, etc. be comparible to the Sigma lens, or do I pay a
cost
besides the stops?

Forget about any TC besides the Sigma 1.4X EX APO, and don't consider
the Simga 2X either. Better idea is to get the Sigma 80-400 OS, it
is significantly sharper than any of the above and a lot stronger. If
you have to shoot at f/2.8, the Sigma 70-200 EX is the best buy, about
$800 less than your lower optically rated Nikkor.

Alas, your logic is flawed. He already has the 80-200mm f/2.8. So if he were
to follow your advice, he would end up spending more than if he purchased
the TC...

"George Preddy" wrote in message
om...
Get the Simga 70-200 EX, all the 70-200 class lenses rate the same
optically, and the Sigma is much better built and much less expensive
than the plastic Nikon...

http://www.photozone.de/2Equipment/easytxt.htm#Ztelef

Also the Sigma 1.4X TC has almost no image degradation at all, using
it is not noticable. The others' TC's degrade image quality
dramatically, much like the Simga 2X.

Also, the Sigma 80-400 OS is much sharper than the 70-200 EX at 200mm.

But I'm wondering about quality or other detrimental effects of using
the
teleconverter. I've never used one before. Will the image sharpness,
contrast, colour, etc. be comparible to the Sigma lens, or do I pay a
cost
besides the stops?

Forget about any TC besides the Sigma 1.4X EX APO, and don't consider
the Simga 2X either. Better idea is to get the Sigma 80-400 OS, it
is significantly sharper than any of the above and a lot stronger. If
you have to shoot at f/2.8, the Sigma 70-200 EX is the best buy, about
$800 less than your lower optically rated Nikkor.

Alas, your logic is flawed. He already has the 80-200mm f/2.8. So if he were
to follow your advice, he would end up spending more than if he purchased
the TC...

"George Preddy" Steve Giovanella wrote:


Get the Simga 70-200 EX, all the 70-200 class lenses rate the same
optically, and the Sigma is much better built and much less expensive
than the plastic Nikon...


Shut up, Preddy.

"George Preddy" Steve Giovanella wrote:


Get the Simga 70-200 EX, all the 70-200 class lenses rate the same
optically, and the Sigma is much better built and much less expensive
than the plastic Nikon...


Shut up, Preddy.