Author Topic: Can a TC 20 teleconverter be hardware calibrated?  (Read 579 times)

Jürgen Pfeiffer

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Can a TC 20 teleconverter be hardware calibrated?
« on: June 12, 2024, 11:39:22 »
Background to the question is: I recently bought an used TC-20 EIII. When comparing test shots with an old AF-I TC-20 E, I noticed that the TC20 EIII did not produce images as sharp and high in contrast as the old TC 20E.
I carried out the test with a 300mm f4.0 lens on a Nikon Zf and FTZ (heavy Gitzo stand, VR off, short times, f8 and f11)

Does anyone know whether a teleconverter can be calibrated on the hardware side? AF fine tune makes no sense on a mirrorless camera? I am grateful for any advice.

best regards

Juergen
Jürgen Pfeiffer

Erik Lund

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Re: Can a TC 20 teleconverter be hardware calibrated?
« Reply #1 on: June 13, 2024, 13:56:55 »
Not really possible to calibrate yourself, try another TC or just use the one that is good, at f/8 - 11 there should be no difference anyway,,,
Different lenses have different results with TC's,,,
Erik Lund

Jürgen Pfeiffer

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Re: Can a TC 20 teleconverter be hardware calibrated?
« Reply #2 on: June 13, 2024, 17:13:54 »
Eric,

with f8 and f11 I was referring to max aperture and one stop down on a 300mm f4 with 2x converter.
Anyway - today I ordered a Nikon Z 400 4.5, will sell the AFS 300 and the converters, so the problem will be solved magically :) :)
Jürgen Pfeiffer

Nasos Kosmas

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Re: Can a TC 20 teleconverter be hardware calibrated?
« Reply #3 on: June 13, 2024, 18:35:55 »
Eric,

with f8 and f11 I was referring to max aperture and one stop down on a 300mm f4 with 2x converter.
Anyway - today I ordered a Nikon Z 400 4.5, will sell the AFS 300 and the converters, so the problem will be solved magically :) :)
:)