Author Topic: TC 16A  (Read 3957 times)

ArendV

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Re: TC 16A
« Reply #15 on: July 12, 2016, 10:43:55 »
I have also used a modified TC-16A on the Nikkor 500/4P (sold years ago) and in my experience it was decent but the TC-17E II (and TC-14E II) were sharper in combination with the 500/4P.

Arend

John G

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Re: TC 16A
« Reply #16 on: August 16, 2016, 20:38:01 »
I have had a opportunity to offer a image captured by the TC 16A 500mm f4 AIP, of our Resident Kestrel.
I think I have put the TC 16A to its upper limit of AF performance in obtaining a focus on a subject in a difficult
environment.
The Camera is appoximately 70 metres from the tree base, the Kestrel is near 30 metres above the ground.
The view to the Kestrel is looking to the West, and the Sun is in the South slightly heading West.
So a lot of natural light on the Kestrel.
The aperture in the leaves is about 80 - 100mm and the Kestrel is positioned about 150mm inside the aperture.
I have done one High Pass Filter in CS6 at a 3.5 setting assist the sharpening.   
John Gallagher

Snoogly

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Re: TC 16A
« Reply #17 on: July 18, 2021, 04:18:43 »
I am reviving a very old thread!

I was unaware this even existed, and was equally unaware about the modification - but I just saw this listed and bought it on impulse. Only now I am investigating how to use it  ;) ;) ;) ;)

Any idea what ‘Borg compatible’ might refer to?

https://www.mercari.com/jp/items/m62787542758/


Akira

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Re: TC 16A
« Reply #18 on: July 18, 2021, 06:47:27 »
I am reviving a very old thread!

I was unaware this even existed, and was equally unaware about the modification - but I just saw this listed and bought it on impulse. Only now I am investigating how to use it  ;) ;) ;) ;)

Any idea what ‘Borg compatible’ might refer to?

https://www.mercari.com/jp/items/m62787542758/

BORG recommends Pentax AF teleconverter for the Pentax users to turn their telescopes into AF teles.  The seller at Mercari offers this modified Nikon TC-16A for the Nikon users to do the same thing.  As you would know, the stock TC-16A was only compatible with the old film bodies like F3AF or F4, and cannot be used with later AF bodies, film or digital.

FWIW, these images of one of BORG Telescopes with Pentax x1.7 AF TC were taken from BORG's website.
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Snoogly

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Re: TC 16A
« Reply #19 on: July 18, 2021, 07:59:36 »
Many thanks.

I am just blown away by such an ancient device being able to auto focus! I hope it can help me take control of the reflex nikkor 500mm.

Akira

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Re: TC 16A
« Reply #20 on: July 18, 2021, 11:48:48 »
Many thanks.

I am just blown away by such an ancient device being able to auto focus! I hope it can help me take control of the reflex nikkor 500mm.

Sorry to disappoint you, but the 1.6x TC will turn the f8.0 Reflex Nikkor into an f12.8 lens.  And thus any DSLR cannot focus the combo automatically.  I'm not sure if the modified TC-16A can function properly with the Z body/FTZ adapter combo.
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Snoogly

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Re: TC 16A
« Reply #21 on: July 18, 2021, 23:38:30 »
I can see there is going to be a steep learning curve  :-\