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For Sale: SDM to Screwdrive Conversions
Listed: 01-11-2016, 07:27 PM

PentaxForums.com Marketplace Listing

Item for Sale
SDM to Screwdrive Conversions

Asking Price
35.00 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 $30 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!

Last edited by UncleVanya; 11-26-2019 at 07:40 AM.
Views: 37,545
11-02-2018, 05:06 PM   #211
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QuoteOriginally posted by UncleVanya Quote
Bump... bump!
Still $25? I am ready to get mine converted

11-03-2018, 05:47 AM   #212
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QuoteOriginally posted by cajuncutter Quote
Still $25? I am ready to get mine converted
There was a small increase in price, the fee is now $30. I think that is updated on the initial page, but if not I apologize for the confusion.
11-30-2018, 08:33 AM   #213
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Bump... Bump
12-05-2018, 11:01 PM   #214
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Conversions available - get that dead DA* back in action with a quick screw!

01-18-2019, 12:39 PM   #215
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Bring your tired and worn down DA* lenses back to life with ScrewDriveIT! The non-patented, simple conversion from SDM to screw drive. Sure you could do it yourself but why bother when I only charge $30!

Lenses eligible:
DA* 16-50
DA* 50-135
DA* 200
DA* 300

Sadly the DA* 60-250 will not reliably convert. The other DA* lenses lack the needed internal hardware for screw drive.
01-31-2019, 12:59 PM   #216
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Will your fix work on a K3 camera?
01-31-2019, 04:08 PM   #217
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QuoteOriginally posted by leonso Quote
Will your fix work on a K3 camera?
Yes it is camera agnostic. The lens ROM is modified to lie to the cameras and tell them it is a screw drive only lens instead of telling the camera it can do both. This makes the camera bypass SDM and use screw drive. I have used my converted lenses on a K100D, K100D Super, K-3, and K-1 and never had a problem.
02-21-2019, 09:49 PM   #218
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Just a reminder this service is still available.

03-08-2019, 02:13 PM   #219
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Still doing my best to return these lovely lenses to functioning members of your flock. Let's get those shelf queens back in rotation!
03-09-2019, 09:39 AM   #220
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Uncle Vanya,

Any chance that you could tackle a DA* 55?

Best,

JVA
03-09-2019, 10:05 AM   #221
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QuoteOriginally posted by jva59 Quote
Uncle Vanya,

Any chance that you could tackle a DA* 55?

Best,

JVA
The DA*55 can't be converted as it has no screwdrive. It'll usually be fine as long as you use and exercise it regularly.
03-09-2019, 10:45 AM   #222
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QuoteOriginally posted by HarisF1 Quote
The DA*55 can't be converted as it has no screwdrive. It'll usually be fine as long as you use and exercise it regularly.
Thanks for the info! Best, JVA
03-09-2019, 10:36 PM   #223
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QuoteOriginally posted by jva59 Quote
Uncle Vanya,

Any chance that you could tackle a DA* 55?

Best,

JVA
Only the DA* 16-50, 50-135, 200 and 300 can be converted with this method.
03-10-2019, 06:04 PM   #224
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QuoteOriginally posted by UncleVanya Quote
Only the DA* 16-50, 50-135, 200 and 300 can be converted with this method.
Thanks for letting me know. Alas the SDM motor in my 55 is shot, so I'll have to have something done.
04-28-2019, 05:13 PM   #225
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SDM on the 50-135 I just bought in the Marketplace has quit. Screwdrive is fine. Sending my lens and a PM.
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