I am not home. Do not ship to my home at this time. Contact me for alternate arrangements.

PentaxForums.com Marketplace Listing

Item for Sale
SDM to Screwdrive Conversions

Asking Price
45.00 USD

Item Location
Mint Hill, NC (United States)

Item Description
As a service to fellow Pentax Forum users and with special permission from Adam I am happy to announce that I am available to convert failed SDM lenses to Screwdrive. I am only charging $45 at this time for lenses that I know how to convert. This is merely to cover my time and effort involved in tracking and sending packages and the time required to perform the conversion. The actual conversion is not hard and I encourage those willing to do this for themselves to do so but for those who want a bit of help - I'm offering this service.

The service includes:
Test Lens prior to conversion to verify that screwdrive is functional.
Backup LENSEEP.LNS file as is.
Modify a copy of this file to have screwdrive configuration.
Load modified file into the lens and test on an SDM capable body.
Return lens postage paid by owner.

Optionally: Email backup and modified files to the owner.


I have successfully converted all of these lenses:
DA* 16-50
DA* 50-135
DA* 200
DA* 300

I am unable to convert the DA* 60-250. There are no known methods for this conversion since the method that works for the other lenses is unreliable on this lens.

An example converted 16-50:



Please NOTE Lenses shipped to me without insurance that are lost are not my responsibility. I strongly suggest using a method with tracking and insurance but that is entirely up to you. My return postage will be based on your explicit instructions and I will not be responsible for lost items. I encourage the use of tracking and insurance.

I STRONGLY recommend that you include a letter inside the package identifying your Pentax Forums ID, the email you wish to be billed at and a contact phone number as well as full address. Ideally the letter should contain your address and mine just in case the label is lost for any reason. Finally if you include your postage instructions (insurance amount, signature required) it will make it easier. You should include not only an email for contact but also the specific email for me to send a paypal invoice to for payment.

Shipping Destinations
United States (Others considered on request)

Shipping Charge
Paid by Lens Owner

Shipping Services
USPS, UPS

Accepted Payment Types
PayPal

Return Policy & Additional Details
If I am unable to convert the lens I will not charge for the service. Lens owner is still responsible for return shipping.

Please send me a private message if interested in the service!


In Canada fozzfoster is offering a similar service: https://www.pentaxforums.com/forums/24-photographic-equipment-sale/456045-sa...ns-canada.html

[am1wayfarer]

Thanks very much for converting my 50-135. It works like a charm now. I greatly appreciate it.

[UncleVanya]

Thanks very much for converting my 50-135. It works like a charm now. I greatly appreciate it.

My pleasure. I'm happy to get these back in circulation.

[UncleVanya]

Still offering this service… many many satisfied customers.

[45luki45]

witam
mam możliwość kupna tanio DA* 50-135 bez SDM .
Czy jest możliwość ożywienie tego obiektywy dla Pentax KP

[gatorguy]

witam
mam możliwość kupna tanio DA* 50-135 bez SDM .
Czy jest możliwość ożywienie tego obiektywy dla Pentax KP

Forum rules require all future posts to be in English.

One-time courtesy translation:
Hello
I can buy cheap DA * 50-135 without SDM.
Is it possible to revive this lenses for the Pentax KP

[UncleVanya]

witam
mam możliwość kupna tanio DA* 50-135 bez SDM .
Czy jest możliwość ożywienie tego obiektywy dla Pentax KP

Forum rules require all future posts to be in English.

One-time courtesy translation:
Hello
I can buy cheap DA * 50-135 without SDM.
Is it possible to revive this lenses for the Pentax KP

Thanks. Yes. If you want to send to me I can convert it.

[c.a.m]

Thanks. Yes. If you want to send to me I can convert it.

Just wondering if the new member means "Can the SDM be revived?" Sounds like the lens they can buy has the SDM disabled.


- Craig

---

Last edited by c.a.m; 02-19-2022 at 12:52 PM.

[UncleVanya]

Just wondering if the new member means "Can the SDM be revived?" Sounds like the lens they can buy has the SDM disabled.


- Craig

Good point. I can convert it to screw drive but reviving it is complicated and best discussed in another thread.

[mysterick]

Worked great for me ! Thanks Uncle

[45luki45]

The seller of the lens reports: the drive from the K-5 worked. but when it was not used it stopped.

and one more problem. I'm from Poland

[UncleVanya]

The seller of the lens reports: the drive from the K-5 worked. but when it was not used it stopped.

and one more problem. I'm from Poland

Sorry - I don't enjoy international shipping. I suggest you post on the main forum (not the sales threads) and we can try to help you. The K-3 and newer gear can be used with the lens after conversion but cannot do the conversion. You need an older body.

---------- Post added 02-20-22 at 05:23 PM ----------

Worked great for me ! Thanks Uncle

Always happy to help a forum member.

---------- Post added 02-21-22 at 10:02 AM ----------

Just a reminder. This works only on the DA* lenses released with both screw drive and sdm:

DA* 16-50 (SDM NOT PLM)
DA* 50-135
DA* 200
DA* 300

The DA* 60-250 is a lens that in theory could work but in practice doesn’t typically have food results from conversion (focus is intermittent and strange when converted. ).

[UncleVanya]

Still offering this service.

[steamloco76]

I may have to send my very much loved DA*300/4 for conversion, it's having issues " waking up"..

[UncleVanya]

I may have to send my very much loved DA*300/4 for conversion, it's having issues " waking up"..

That’s one of the least often converted lenses but everyone who has sent me there’s has reported being pleased with the results.

Well that’s not entirely true… one lens was destroyed in shipping to me, but eventually that one was replaced via the insurance on the package. The order was without their lens for quite some time so perhaps they weren’t entirely happy but they never complained as it was out of either of our hands. That incident was weird as it was extremely well packed and looked good on the outside. A very small hole was visible but nothing clear was wrong. Once opened up it looked ok as well. Deeply inspecting the package showed a tiny puncture went all the way to the lens front element. It passed through several layers of protective cardboard and cloth. The theory is that a long rod from another package was responsible. It was mystifying. I think that’s literally the only lens every damaged in transit in either direction.

[UncleVanya]

Still converting