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pentax da* 50-135 sdm

reso
Posted 01/07/2023 - 13:14 Link
how do you wake up sdm ?
k5iis k3ii tamron 17-50 pentax faj 18-35 pentax da 18-135 tokina 20-35 tokina 28-70 atx pro pentax dfa 100 wr
pentax da*50-135 pentax da*60-250 sigma af 400mm pentax 1.7 af adapter
Pentax af aw 1.4 rear converter and a flash
HarisF1
Posted 01/07/2023 - 13:36 Link
Put it on the camera body, cap on.

Hold the AF button to force the lens to focus while at the same time turn the focusing ring back and forth. You should see the AF light turn on while this happens.

After a while, there's a chance the SDM will become free and so the lens will start to focus correctly.
All the gear with no idea
Mike-P
Posted 01/07/2023 - 13:44 Link
I always found putting the camera into live view and pressing the autofocus button a few times worked best.
Edited by Mike-P: 01/07/2023 - 13:44
reso
Posted 01/07/2023 - 13:48 Link
Tryed both ways and still no joy
k5iis k3ii tamron 17-50 pentax faj 18-35 pentax da 18-135 tokina 20-35 tokina 28-70 atx pro pentax dfa 100 wr
pentax da*50-135 pentax da*60-250 sigma af 400mm pentax 1.7 af adapter
Pentax af aw 1.4 rear converter and a flash
JohnX
Posted 01/07/2023 - 16:48 Link
Before you try either of the first two suggestions, get a small screwdriver that fits the screwdrive slot in the end of the lens, then keep rotating the screwdriver to drive the lens focus from end to end. Do this for a few minutes. Then try suggestions above. Wakes my dozy lens up every time.
reso
Posted 01/07/2023 - 17:28 Link
Thanks for all the help
its packed up ready to post on monday for a screwdrive convershion
k5iis k3ii tamron 17-50 pentax faj 18-35 pentax da 18-135 tokina 20-35 tokina 28-70 atx pro pentax dfa 100 wr
pentax da*50-135 pentax da*60-250 sigma af 400mm pentax 1.7 af adapter
Pentax af aw 1.4 rear converter and a flash
JohnX
Posted 01/07/2023 - 18:04 Link
Reso, can you give me details of who you're getting to do the conversion, please, should I need it too?
maranatha
Posted 01/07/2023 - 21:44 Link
yes this would be very helpful

JohnX wrote:
Reso, can you give me details of who you're getting to do the conversion, please, should I need it too?

A question is only easy when you know the answer ..
HarisF1
Posted 04/07/2023 - 18:18 Link
HarisF1 wrote:
Put it on the camera body, cap on.

Hold the AF button to force the lens to focus while at the same time turn the focusing ring back and forth. You should see the AF light turn on while this happens.

After a while, there's a chance the SDM will become free and so the lens will start to focus correctly.

This method seems to also click when you manually focus the lens at a distant object. The lens seems to try and push for that last bit of precise focus, freeing the motor.
All the gear with no idea

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