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Old Dec 5, 2006, 4:54 PM   #1
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I am looking for recommendations on purchasing this Nikon tele- converter for the following nikkor lenses:

10.5 Fisheye ---
18-70mm ---
70-300mm ---
18-200mm VR ---

All Nikkor AF-S G-ED lenses

Does the auto focus function properly?
I read somewhere that it is sporadic with some lenses (ken rockwell's review of the TC-1.4E II tele converter I believe)

Second whould I be better off purchasing the nikkor 400mm instead?
Perhaps someone has other recommendations for a nice long distance lens.
1500 FRN's or under please.

The camera's are 2 Nikon D200's and a D70 (if that helps)

While I would love to have an 8000 FRN lens, it's just not realistic for me.
I also know there are a lot of specifics I have left out here (ie: what I intend to shoot, etc.)

peace,

haans
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Old Dec 5, 2006, 5:08 PM   #2
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I'm not sure about the other 2, but I know converters cannot be used with the 18-200 or the 18-70. When these lenses are zoomed all the way out, the rear element of the lens will make contact with the front element of the TC. In addition, you'd likely lose AF anyway becasue of the light loss. It's typically not a good idea to use TC's with any zoom lens anyway.
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Old Dec 6, 2006, 2:51 PM   #3
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rjseeney wrote:
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It's typically not a good idea to use TC's with any zoom lens anyway.
Why not....just that the fstop is already slow and would want to go even slower? or some other reason.
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Old Dec 6, 2006, 5:58 PM   #4
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Kita wrote:
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rjseeney wrote:
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It's typically not a good idea to use TC's with any zoom lens anyway.
Why not....just that the fstop is already slow and would want to go even slower? or some other reason.
First the loss of light caused will either slow AF to a crawl, or render it useless. nikon lenses need an aperature of at least F 5.6 for AF to operate. Many lenses are already at f 5.6 at full zoom, epsecially longer telezooms. Second, TC's typically degrade image quality, which is not a strong point of consumer zooms to begin with. TC's tend to magnify these optical shortcomings and make them more noticeable. Finally, they make longer telezooms nearly impossible to handhold because of the added focal length. These reasons combined with the issue of the AF-s digital zooms possibly having their rear elements damaged for the reason i mentioned before, TC's are not a good idea. TC's work much better with fast primes.
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