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K_50 aperture block issues / 55-300 PLM lens

Started Jun 28, 2020 | Discussions thread
Kobie M-C
Kobie M-C Contributing Member • Posts: 701
Re: K_50 aperture block issues / 55-300 PLM lens
1

The K-50 is actually the oldest camera that will work with PLM lenses. I because I've done the hackware to get my K-30 onto K-50 Firmware and my 55-300 PLM works fine on it.

From what I've read across the internet, since the PLM uses an electromagnetic aperture system, there's no mechanical lever in use so the can't be aperture block failure since it doesn't use the mechanical aperture mechanism inside the camera. People with aperture block failures have reported that they've had no issues using the 55-300 PLM.

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 Kobie M-C's gear list:Kobie M-C's gear list
Pentax K-30 Pentax K-3 Pentax K-3 Mark III Pentax smc DA 18-135mm F3.5-5.6ED AL [IF] DC WR Pentax smc DA 50mm F1.8 +6 more
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