Is my teleconverter defective?

Started Nov 8, 2013 | Questions thread
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GossCTP Veteran Member • Posts: 4,711
Is my teleconverter defective?

My Vivitar Series 1 1.4x TC was waiting in the mailbox when I came in this evening. I was playing around with it, but I noticed that it was reporting the full aperture of the lens. As in, I could still get f/1.4 on my FA 50, even though it should only be f/2. It says the focal length is 50mm as well. Perhaps that's why the instructions say to turn off SR. I haven't had time to play with it in decent light to see if it's underexposing The body is a K20d. Is this normal?

P.S. - I didn't buy it to use on the 50. It behaves the same on the A* 300 as well.

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 GossCTP's gear list:GossCTP's gear list
Panasonic Lumix DMC-LX5 Pentax K20D Pentax K-5 II Pentax smc FA 50mm F1.4 Pentax smc DA 16-45mm F4 ED AL +7 more
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Pentax K20D
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