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Forum: Pentax SLR Lens Discussion
08-07-2017, 06:05 AM
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You are very welcome! Enjoy the new life out of your lenses!
My 50-135 is already converted, and I just purchased a used 16-50 with a working SDM. While it works, I'll leave it unconverted. As soon as things change I'll take care of it.
Happy shooting!
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Forum: Pentax SLR Lens Discussion
07-28-2017, 01:49 PM
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Please go for it. We have another user working on this outside the thread. Any help you can provide is appreciated.
---------- Post added 07-28-17 at 03:51 PM ----------
Yes it was ,but was quickly deleted by the admin. It was marked as personal gain and I was almost banned. Sorry I am just answer this now, I missed it in all the excitement.
---------- Post added 07-28-17 at 03:52 PM ----------
Looks promising!
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Forum: Pentax SLR Lens Discussion
05-04-2017, 02:26 PM
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The K-R he was thinking about is 80 EUR. If that doesn't work out, he will probably need between $120-80 USD to get a camera. I am waiting for him to get back to me to see if he wants to give this a go. His perk is he keeps the camera, but as with all hacks, there aren't any guarantees.
If interested members contributed, that would drive down our individual cost. So if you are in, that makes 3 of us, so max damage would be $40 each if my numbers hold. He is in Germany, so the market might be a little different. I'll ask him for more concrete numbers.
Do you think we should start a new donation thread to get on the front page?
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Forum: Pentax SLR Lens Discussion
05-04-2017, 02:03 PM
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I stared a PM with Duc-Driver. He has a 60-250, but he doesn't have a camera to upload/save files. He is willing to give this hack a shot, but might need some help sourcing a camera. Would you be willing to toss in some money towards an camera him? He has found a K-R that might work.
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Forum: Pentax SLR Lens Discussion
05-04-2017, 09:28 AM
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If you had a camera, do you feel you could figure it out?
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Forum: Pentax SLR Lens Discussion
05-04-2017, 08:52 AM
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We have a lot to thank you for!
Do you happen to know the modification required for the 60-250mm? It seems the lens rom requires a different hack.
Thank you!
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Forum: Pentax SLR Lens Discussion
02-21-2017, 06:30 AM
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I am in the same boat... All of the material I used for the tutorial was created by others. I hated how it was spread out in different threads, so my video / post was created to solve that problem. I am just using what was already created and given to me. For that matter, I don't know who made the "hack" files available in the drop box folder. Without that effort, we wouldn't be able to do the work we are doing.
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Forum: Pentax SLR Lens Discussion
02-20-2017, 08:24 PM
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Second this, you may need to send it to UncleVanya to complete the conversion for you.
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Forum: Pentax SLR Lens Discussion
02-09-2017, 06:29 AM
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Wonderful! I am always happy to hear of a working lens!
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Forum: Pentax SLR Lens Discussion
01-08-2017, 03:08 PM
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You are very welcome! I am happy this has helped so many people. Thanks for letting us know!
---------- Post added 01-08-17 at 04:13 PM ----------
I can't say I have these issues. It is my understanding we are only adjusting the lens rom that acknowledges the SDM motor is ready for use. I believe when this "check" happens, our adjustments bypass the "motor is present" or the check fails and by default, screw drive is used. I hate to point to the camera for these issues, but there could be an issue there OR perhaps there is additional issues with your lens other than the SDM and Rom mod.
I hate to hear you are having these issues. Please let us know the outcome.
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Forum: Pentax SLR Lens Discussion
12-11-2016, 11:58 AM
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Not a problem, I am glad I could help. I feel Ricoh should speak to this issue. Too many of us have this problem. I am happy there is an answer for those willing to hack their lens. Too bad the 60-250 and 55 can't be converted.
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Forum: Pentax SLR Lens Discussion
12-09-2016, 05:41 AM
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I don't know if it will work on the 17-70. I had my SDM jam on my 50-135 before I converted. I attached the lens to my film AF body and the screw drive was activated and freeded up the jam. Maybe you could try to spin the focus screw on the lens mount if the lens has one.
IDK if the lens can be converted to screw drive. I wish all the best to you. I hope they replace this lens with a DC motor version.
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Forum: Pentax SLR Lens Discussion
05-23-2016, 01:23 PM
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I had issues with the pkthther site too. I ended up using my Android phone to download the .exe and then saved it to my google drive. I probably should have put the into the OP, but I am betting they will eventually fix the issue.
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Forum: Pentax SLR Lens Discussion
05-23-2016, 07:53 AM
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Many would agree with you. 1st generation SDM was likely a first attempt to step up to a modern lens motor. Unfortunately, the motor wasn't designed correctly and lead to failure. They "fixed" the issue with newer lenses, however the users here say it is a toss up if you will have problems or not. I understand the new Pentax lenses (24-70, 70-200) are SDM, but I am certain it is a newer technology and probably won't have these issues.
IMO They tried really hard to make a modern and silent lens but the engineering of the motor just wasn't reliable. They nailed it in the IQ department, but the motor can't keep up. The screw drive was added for backwards compatibility to older digital bodies that didn't have the power feature. We have this decision to thank for the screw drive hack that bypasses the SDM motor.
I personally learned to love the screw drive. Coming from Canon, I used to turn my nose up to a noisy AF motor. Now, I don't even notice it.
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Forum: Pentax SLR Lens Discussion
05-23-2016, 06:49 AM
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Thank you David!
Yes this is reversible. You simply need to load your old lens file (why I say back it up) and Boom, it will be back to SDM.
As for the performance, it is much better than SDM. I have found it activates faster (delay from AF button press), Adjusts more quickly, and secures focus more accurately. My lens with SDM activated would hunt in lower light. Basically it lazily adjusted to almost in focus, and then edge its way into focus. With screw drive It seems much more confident in low light, spinning into focus quickly and confidently.
And for the sound, it is actually very dampened for a screw drive. My DA 35mm, DA 50mm, and 55-300mm WR lenses are louder than this lens. I think the noise is more than tolerable. I don't mind the sound at all, in some ways I prefer it.
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Forum: Pentax SLR Lens Discussion
05-22-2016, 01:38 PM
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Hello everyone!
After a lot of searching through the forms and help from dflorez, UncleVanya, and whoever made the dropbox link I was able to convert my lens. I had a hard time understanding the process, but I finally figured it out. I decided something this complicated needs a video. In this video I converted the 50-135mm lens, but I understand the process is the same for the 16-50, 60-250, 200, and 300mm lenses. I hope this is helpful to you and Good Luck!
The video is here:
You Tube
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src="https://www.youtube.com/embed/gpfcEebrBSs?controls=1" allowfullscreen>
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Below you will see the process I followed. Again, I have the forums here to thank for giving me this information. I hope it helps you.
Too Much for you? Go here: https://www.pentaxforums.com/forums/24-photographic-equipment-sale/311609-sal...ersions-3.html
Wanna give it a try? Keep Going.
NOTE: I am not responsible for any damage that my occur to your equipment. Continue at your own risk.
Stuff you need:
Dropbox- Pentax Hack Files: https://www.dropbox.com/sh/k464hmts3b9yk98/AAB-TIg_f-HfSowrT7096_YMa/enable%20Debug%20Menu?dl=0
Lens Hack Directions: How to deactivate SDM and allow for screw drive autofocus with DA* 50-135mm f/2.8 - Le site des amateurs de PENTAX
Pktether: Since the site is down due to malware, here is a link to the most recent version on my Google Drive: https://drive.google.com/open?id=0B2uv9RXId6z4eUE2OTZmVTMybFk
If the site ever gets fixed... you can go here. BUT DON'T right now (05/24/16) PK_Tether – Tethering Software for Pentax DSLR Cameras
Nopad++ (text editor): https://notepad-plus-plus.org/download/v6.9.2.html
Pentax Forums Other Links:
https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/208353-how-...-2-8-a-41.html
My Steps
1.) Download PKTether (pktether site)
2.) Download Camera Hack files (drop box)
3.) Download Notepad++
4.) Open Pktether
5.) Place SD card into camera, connect camera to computer (USB cable)
6.) Turn on Camera In PKtether activate DEBUG MODE
7.) Copy Hack Files to SD card
8.) Disconnect camera from USB cable
9.) Power Down Camera, Power back on
You are in Development Menu
10.) Scroll down to "Lens Rom Camera=SD" and hit OK. (it should go black, and then you will see the same screen again)
11.) Power off camera, Move SD card to PC and open it
12.) You are looking for the LENSEEP.LNS file. MAKE A BACKUP of this file - THIS IS LENS COPY SPECIFIC - ONLY YOUR FILE WORKS WITH YOUR LENS!
13.) Open LENSEEP.LNS with Notepad++
14.) Replace ALL instances of "C0" in column "03" with "80". DO NOT REPLACE any instances of "C0" outside of column "03".
15.) Move the new LENSEEP.LNS file to your SD card (replacing the orginal, remember to back up the orginal)
16.) Power Camera on
17.) Scroll to "LENS ROM DAT SD= CAMERA" and hit OK ( you will see "Wait..." and then some text)
NOTE: It failed the first time for me, needed to do it twice
18.) When Complete, lens should be in screw Drive
19.) Disable Debug Mode
A.) Use camera settings Menue Button Scroll left until you see "Test Mode" Disable Debug Mode Hit OK
B.) Connect to PKtether, Click Debug Mode Off
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