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06-25-2008, 07:38 AM   #1
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K10D+M42 lens+SigmaEF530 FP question

I brought Sigma EF530 today, but after couple test I found the situation as below

K10D+M42 lens+EF530 ----- M mode,can't FP,shutter speed is limited within 1/180s
K10D+Voigtlander 125mm lens+EF530 ----- M mode,FP(High Speed Sync) ok。
K10D+FA50mm lens+EF530 ----- M mode,FP(High Speed Sync) ok。

looks like this kind of symptom related to M42 lens, don't know is there any one have ever use K10D or K100D+M42 lens+ AF360, AF540 or EF530 can use flash FP(High Speed Sync) function.

is there any way I can use M42 lens with FP or this is the limitation it already know.

Need your help. thanks!

06-25-2008, 07:42 AM   #2
Lowell Goudge's Avatar

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not sure about high speed sync, with non A lenses. My understanding of the K10D (at least my copy) is that with manual lenses all you can do is either manual or "Auto" mode if the flash supports it.

I don't know the Voigtlander 125mm , but the FA50mm will support all flash modes on the K10D

The manual does not acvtually specify the lens types needed for high speed sync
06-25-2008, 05:04 PM   #3
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so, looks like this is the limitation for M42 lens with high speed sync.

but I don't understand why pentax can't let us input aperture value like the vibration value we input when we use M42 lens for high speed sync.

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