Is Tamron 1.4X Pz-AF MC4 TC Really FF?

Started Jun 19, 2017 | Discussions thread
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Greyser Veteran Member • Posts: 6,365
Is Tamron 1.4X Pz-AF MC4 TC Really FF?
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A few minutes ago I did quick an dirty test. No tripod, all handheld, with no intent for the ultimate IQ. However, it looks like old Tammy goody does AF with K-1 and D FA 150-450 with almost no vignetting at both 150mm and 450mm ends wide open (just a bit). At least vignetting from HD Pentax-DA 1.4x AW AF RC is much more pronaunced. I haven't tested how accurate AF is, though.

 Greyser's gear list:Greyser's gear list
Nikon D500 Nikon D850 Sigma 24-105mm F4 DG OS HSM Sigma 500mm F4 Sport Nikon AF-S 70-200mm F2.8E FL ED VR +2 more
Pentax FA 150-450mm F4.5-5.6 Pentax K-1
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