Nikon Telephoto Converters

[nikonuser]

Does anyone know if AF works on the 1.4; 1.7 and 2x converters please.
With the 2x is there much reduction in image quality.
Not yet decided on the tc yet but it will be added to a 70-200 VRII on a D700.
Thanks for your help
Dave

 

[Flash In The Pan]

Does anyone know if AF works on the 1.4; 1.7 and 2x converters please.

Yes

With the 2x is there much reduction in image quality.

Not with the TCIII on the 70-200 VRI or 300 2.8 - that one Ryan just sold in the Classifieds was a bargain too

 

[nikonuser]

Thanks Graham just the info. I was after
dave

 

[PaulMW]

Here is a link to a Nikon compatibility chart

I have used the TCIII on my 70-200 VRI, it seemed to work fine, though not tested extensively.

 

[Martyn...]

Here is a link to a Nikon compatibility chart

I have used the TCIII on my 70-200 VRI, it seemed to work fine, though not tested extensively.

The chart is not correct, it lists several of my lenses not AF'ing with the 1.7TC, when they do.

I can get AF with a 1.7TC and 300 f4AF-S, 200-400 f4, 500 f4 and 105 f2.8 macro.

 

[PaulMW]

The chart is not correct, it lists several of my lenses not AF'ing with the 1.7TC, when they do.

I can get AF with a 1.7TC and 300 f4AF-S, 200-400 f4, 500 f4 and 105 f2.8 macro.

I can generally get AF with the 1.7TC on my 600 f4 too and even with the 2.0 TCIII, I think Nikon only use this listing as guidelines, i.e they will not guarantee AF in certain circumstances with certain TC's.

The new D4 will have an f8 AF point so I guess these recommendations will be changing soon, certainly where the D4 is concerned....

 

[nikonuser]

very interesting Guys, many thanks for the added information
Dave

 

[Martyn...]

I can generally get AF with the 1.7TC on my 600 f4 too and even with the 2.0 TCIII, I think Nikon only use this listing as guidelines, i.e they will not guarantee AF in certain circumstances with certain TC's.

The new D4 will have an f8 AF point so I guess these recommendations will be changing soon, certainly where the D4 is concerned....

The list has not changed in years, it was probably relevant with some of the older bodies, but the advances in the AF systems have made the list out of date.

Nikon are also covering themselves against litigation should a lens not AF correctly.

 

[PaulMW]

The list has not changed in years, it was probably relevant with some of the older bodies, but the advances in the AF systems have made the list out of date.

Nikon are also covering themselves against litigation should a lens not AF correctly.

The other thing to bear in mind here is that Nikon do not physically restrict or limit AF in the same way that I believe Canon do at certain lens aperture levels.

So although the camera is still auto focusing at higher Aperture levels (a 2.0 TC on my 600/f4 effectively turns it into a 1200/f8 and the D3s technically requires a maximum aperture of at least f5.6 to autofocus) it may be slower or give poorer results. This is the reason Nikon list in the way they do.