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Sandy Hancock · 12-29-2019, 08:48 PM

I have a K10D borrowed semi-permanently from a mate who no longer shoots Pentax. I have used it for two SDM conversions - on a DA* 16-50 some years back and more recently on a DA* 50-135.

So it definitely can be used.

**UncleVanya** · 12-29-2019, 09:05 PM

Originally posted by Sandy Hancock

I have a K10D borrowed semi-permanently from a mate who no longer shoots Pentax. I have used it for two SDM conversions - on a DA* 16-50 some years back and more recently on a DA* 50-135.

So it definitely can be used.

Sandy can you clarify the firmware version that camera has?

Sandy Hancock · 12-29-2019, 09:13 PM

Originally posted by UncleVanya

Sandy can you clarify the firmware version that camera has?

1.31

**UncleVanya** · 12-30-2019, 07:22 AM

Originally posted by Sandy Hancock

1.31

Thanks.

lotech · 01-02-2020, 11:08 PM

While my 16-50 started to fail few years back I bought the K3, I also had the K5 during such time, I compared both with the lens and found that, the lens reluctant to focus on the K5 but completely dead on the K3, I repeated the test and got the same result, so I suspected the K3 produced lower drive current to the SDM than the K5, or the K3 has more sensitive protection settings.

**UncleVanya** · 01-03-2020, 01:28 PM

Originally posted by lotech

While my 16-50 started to fail few years back I bought the K3, I also had the K5 during such time, I compared both with the lens and found that, the lens reluctant to focus on the K5 but completely dead on the K3, I repeated the test and got the same result, so I suspected the K3 produced lower drive current to the SDM than the K5, or the K3 has more sensitive protection settings.

Very interesting! Thanks.

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12-29-2019, 08:48 PM	#16
Sandy Hancock Moderator Site Supporter Join Date: Feb 2012 Location: Adelaide Hills, South Australia Photos: Gallery \| Albums Posts: 11,276	I have a K10D borrowed semi-permanently from a mate who no longer shoots Pentax. I have used it for two SDM conversions - on a DA* 16-50 some years back and more recently on a DA* 50-135. So it definitely can be used.

12-29-2019, 09:05 PM	#17
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,476 Original Poster	Originally posted by Sandy Hancock I have a K10D borrowed semi-permanently from a mate who no longer shoots Pentax. I have used it for two SDM conversions - on a DA* 16-50 some years back and more recently on a DA* 50-135. So it definitely can be used. Sandy can you clarify the firmware version that camera has?

12-29-2019, 09:13 PM	#18
Sandy Hancock Moderator Site Supporter Join Date: Feb 2012 Location: Adelaide Hills, South Australia Photos: Gallery \| Albums Posts: 11,276	Originally posted by UncleVanya Sandy can you clarify the firmware version that camera has? 1.31

12-30-2019, 07:22 AM	#19
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,476 Original Poster	Originally posted by Sandy Hancock 1.31 Thanks.

01-02-2020, 11:08 PM	#20
lotech Pentaxian Join Date: Apr 2012 Posts: 1,312	While my 16-50 started to fail few years back I bought the K3, I also had the K5 during such time, I compared both with the lens and found that, the lens reluctant to focus on the K5 but completely dead on the K3, I repeated the test and got the same result, so I suspected the K3 produced lower drive current to the SDM than the K5, or the K3 has more sensitive protection settings.

01-03-2020, 01:28 PM	#21
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,476 Original Poster	Originally posted by lotech While my 16-50 started to fail few years back I bought the K3, I also had the K5 during such time, I compared both with the lens and found that, the lens reluctant to focus on the K5 but completely dead on the K3, I repeated the test and got the same result, so I suspected the K3 produced lower drive current to the SDM than the K5, or the K3 has more sensitive protection settings. Very interesting! Thanks.

SDM Deactivation - a Theory as to why you can't do so on newer bodies.

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