[link81]

ok, Thank you! Just to clarify, since im not super tech inclined, the period at the end of the second line is grammatical, not part of the file name. Correct me if im wrong please.

correct.
the period is before the mod
there is no period after.

so:
xxx.mod
develop.mod

[KonradB]

I have converted my 16 - 50mm lens using my K20D, BBEdit a Mac, and the instructions in this thread, it was surprisingly easy.

Thanks to all who contribute to this thread, your contributions are very valuable.

And shame on Pentax for not providing a solution, hundreds of pounds for lens and no customer service on this issue.

Now to sort out the 50 - 135mm.

[UncleVanya]

I have converted my 16 - 50mm lens using my K20D, BBEdit a Mac, and the instructions in this thread, it was surprisingly easy.

Thanks to all who contribute to this thread, your contributions are very valuable.

And shame on Pentax for not providing a solution, hundreds of pounds for lens and no customer service on this issue.

Now to sort out the 50 - 135mm.

It is essentially the same as the 16-50 conversion. you should have no difficulty if you did the 16-50.

[angerdan]

Any recent experiences about AF performance after conversion to screwdrive?
And how does the AF speed of an converted DA* 300 compare to an F(A)* 300 4.5 ?

[UncleVanya]

Any recent experiences about AF performance after conversion to screwdrive?
And how does the AF speed of an converted DA* 300 compare to an F(A)* 300 4.5 ?

I happen to own the FA* 300 f/4.5 and I have converted one or two DA* 300 f/4's. I do not recall there being a significant difference in speed from the DA* 300 to the FA* 300 in screw drive mode but I may not have done enough testing to make any real determination.

As for speed - ask my latest repair customer says his DA* 50-135 is now one of his fastest lenses to focus. I had another customer with a lens that would not focus in low light using SDM but post conversion it would. My own DA* 50-135 would focus just fine using SDM under the same circumstances so it appears something was wrong with that person's SDM. My guess is that SDM was imprecise - it would try to focus but never lock - once swapped to screw drive - it was a dream. Everywhere my lens focused it did also.

So from my perspective - if you have focus speed and accuracy issues it is potentially worth trying to convert the lens to screw drive.

[thibs]

I happen to own the FA* 300 f/4.5 and I have converted one or two DA* 300 f/4's. I do not recall there being a significant difference in speed from the DA* 300 to the FA* 300 in screw drive mode but I may not have done enough testing to make any real determination.

As for speed - ask my latest repair customer says his DA* 50-135 is now one of his fastest lenses to focus. I had another customer with a lens that would not focus in low light using SDM but post conversion it would. My own DA* 50-135 would focus just fine using SDM under the same circumstances so it appears something was wrong with that person's SDM. My guess is that SDM was imprecise - it would try to focus but never lock - once swapped to screw drive - it was a dream. Everywhere my lens focused it did also.

So from my perspective - if you have focus speed and accuracy issues it is potentially worth trying to convert the lens to screw drive.

In short, apart the noise, there's really nothing in favor of SDM for those lenses.

[tegual]

First of all thanks for all the hard work on those people who contributed to this.

I successfully competed the steps to convert a DA*16-50, DA*50-135 and DA*200 using a k-5ii. The 200 was dieing and had to be convinced to work while the other 2 where fine atm i felt since i was going on a trip soon it would be safer just to do it now, and they feel like new lens and even with a tiny bit more noise i find they are faster at getting focus.

[Botters]

Id like to convert a failed 16-50 and I could get my hands on a local *ist-D for cheap. Anyone know if it can do the job with pktether? Or is the k10d and up the only way. Thx

[UncleVanya]

I don't think the *ist D will work but I could be proven wrong. The K100D is the simplest camera to use. A lot of cameras work so I could be wrong as my experience is not broad since I have a working K100D and K100D Super for this.

[Duc-Driver]

jep - *ist D is not working for that because you cant store/restore lensrom with it

[r0ckstarr]

Has anyone gotten this to work with the DA*300? My AF stopped working about a year ago and I was considering trying this. Reading through the instrucstions, without having done anything yet, I am confused as to what this line means:

Then change the code "C0" by "80" in the colonn 03,for the following lines

Do I change C0 to 80 in column 3? Or is this an option I will see once I have everything hooked up?

[UncleVanya]

Yes it works. I've converted a few. Also the file has headers marked as "columns" but these aren't actual columns in terms of the traditional meaning in a data file. It will be easy to see however once you open the file.

[r0ckstarr]

Yes it works. I've converted a few. Also the file has headers marked as "columns" but these aren't actual columns in terms of the traditional meaning in a data file. It will be easy to see however once you open the file.

Thank you.

[angerdan]

Has anyone gotten this to work with the DA*300?

Any recent experiences about AF performance after conversion to screwdrive?
And how does the AF speed of an converted DA* 300 compare to an F(A)* 300 4.5 ?

I happen to own the FA* 300 f/4.5 and I have converted one or two DA* 300 f/4's. I do not recall there being a significant difference in speed from the DA* 300 to the FA* 300 in screw drive mode but I may not have done enough testing to make any real determination.

As for speed - ask my latest repair customer says his DA* 50-135 is now one of his fastest lenses to focus. I had another customer with a lens that would not focus in low light using SDM but post conversion it would. My own DA* 50-135 would focus just fine using SDM under the same circumstances so it appears something was wrong with that person's SDM. My guess is that SDM was imprecise - it would try to focus but never lock - once swapped to screw drive - it was a dream. Everywhere my lens focused it did also.

So from my perspective - if you have focus speed and accuracy issues it is potentially worth trying to convert the lens to screw drive.

Just 6 posts before yours you got the complete answer.

[r0ckstarr]

Ignore. I figured it out.