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Da* 50-135 sdm problem again

gtis
Posted 31/07/2020 - 17:55 Link
Hi
I know this is old hat
But my DA* 50-135 SDM as failed again
I am not going to spend money on it again
How easy is it to convert to screw drive
Or any suggestions on how to get it going again
Neil
cheers Neil
pentax k3
DA* 300 f4 DA* 50-135 f 2.8 smc DA* 16-50 f2.8 50mm f1.7 pentax1.4xhd converter





Panasonic Dmc Fz200
fatspider
Posted 31/07/2020 - 18:35 Link
It's easy, not much different to updating firmware. just download the files and follow the instructions.
My Names Alan, and I'm a lensaholic.
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Crossed-up
Posted 31/07/2020 - 19:11 Link
If you done mind a bit of disassembly/reassembly then you may be able to tweak the motor back into life like I did a few weeks back:

https://www.pentaxuser.com/forum/topic/da--50-135-sdm-autofocus-problems--45483/p-0#comm650376
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gtis
Posted 31/07/2020 - 21:07 Link
fatspider wrote:
It's easy, not much different to updating firmware. just download the files and follow the instructions.

Hi Alan
But donít you have to rewrite the code
Neil
cheers Neil
pentax k3
DA* 300 f4 DA* 50-135 f 2.8 smc DA* 16-50 f2.8 50mm f1.7 pentax1.4xhd converter





Panasonic Dmc Fz200
fatspider
Posted 31/07/2020 - 22:40 Link
Yes, but it's relatively easy;

https://www.youtube.com/watch?v=3_I6jgc-TT0
My Names Alan, and I'm a lensaholic.
My PPG link
My Flckr link
gtis
Posted 01/08/2020 - 15:16 Link
Hi Alan
Got it going again by spinning the focus ring
Donít know how long it will last
I will have to use it more often
Thanks for all comments
Alan is there a goth weekend at Whitby
Neil
cheers Neil
pentax k3
DA* 300 f4 DA* 50-135 f 2.8 smc DA* 16-50 f2.8 50mm f1.7 pentax1.4xhd converter





Panasonic Dmc Fz200
fatspider
Posted 01/08/2020 - 18:00 Link
gtis wrote:
Hi Alan
Got it going again by spinning the focus ring
Donít know how long it will last
I will have to use it more often
Thanks for all comments
Alan is there a goth weekend at Whitby
Neil

Mine doesn't get as much use as it should but fortunately it's still working OK.

You may not be aware but there's been changes to the Goth Weekend, the official WGW lost the use of the Spa for the markets and bands and someone else started an event called Tomorrows Ghost, last year they were on separate dates but this year they were combining again, obviously Corona put a stop to that, Tomorrows Ghosts have just recently announced they will not be hosting in November and April next year may be a low key event depending on how the pandemic pans out, I'm assuming WGW will be along the same lines. Last week was the July Steampunk Weekend and despite been canceled many apparantly still turned out.
My Names Alan, and I'm a lensaholic.
My PPG link
My Flckr link
gtis
Posted 22/08/2020 - 17:30 Link
Hi thanks for all comments itís gone again
I have looked at the video and read all about
The work involved
I have decided not to risk it so i am going
To stick with it in manual
Neil
cheers Neil
pentax k3
DA* 300 f4 DA* 50-135 f 2.8 smc DA* 16-50 f2.8 50mm f1.7 pentax1.4xhd converter





Panasonic Dmc Fz200
carmagw
Posted 23/08/2020 - 08:42 Link
Hi Neil, if you were ever coming though Sheffield when things have settled down I would happily do it for you. Tried it on my 50-135 and 300 with no problems and subsequently converted it back to sdm (no issues with mine I wanted to see the speed of AF under screw drive, felt fractionally quicker but I wasnít as keen on the sound)

Or if you wanted to post it I could do it.

Regards

George
gtis
Posted 23/08/2020 - 21:42 Link
Hi George
Thanks for the offer hopefully going
To get it sorted sometime this week
But I will keep you in mind if it falls through
Neil
cheers Neil
pentax k3
DA* 300 f4 DA* 50-135 f 2.8 smc DA* 16-50 f2.8 50mm f1.7 pentax1.4xhd converter





Panasonic Dmc Fz200

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