My 60-250 Journey.
The issue sounds really intriguing, maybe something wrong with the circuitry or EEPROM.
I'd look to buy a cheap one with a dead SDM in order to swap the PCB. You could end up with one fully working lens.
And regarding compatibility with the K-1, if you remove the baffle you get a sizeable reduction in vignetting. It's not a difficult process (remove three screws on the mount, pull the flocked cylinder off from the rest of the baffle (it's glued on), then reinstall.
I wouldn't go for the dremel option for marginal gains as it's a permanent change.
As far as IQ goes it is a stellar performer. You have got yourself a bargain.
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This is why I don't touch 1st gen Pentax SDM lenses.
Fan of DA limited and old manual lenses
Now am I right in thinking the SDM motor is good as it works perfectly in live view? It's only through the viewfinder that the lens won't focus.
Anyone know how long jps guarantee their repairs for?
I also think the screwdrive conversion does not work with the 60-250, which is a shame.
What do you intend to use the lens for ? Even when working normally the SDM AF is not very quick, and probably unsuitable for sports action or moving wildlife. If you are going to use it for still subjects I would suggest saving your £420, and use the VF in manual focus mode or the LV in AF.
Out of interest, in VF mode do you get the focus confirmation .....green hexagon/beep ?
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Screw drive conversion is not possible on this lens, just My luck as it worked perfect on the film bodies.
In VF it did nothing at all, didn't move. When focused through the VF there was nothing, no confirmation from anything. In LV it worked perfectly, just a shame I don't really like or enjoy LV, plus the 60-250 is to big to be used handheld in LV.
Once repaired I have options, to use or to sell on. If I don't get it fixed it will just end up under the bed never to be used again, which is a waste. I'm confident I can get My money back. The thing is in real good condition and the current cheapest copy on ebay is for sale above what I'll have in it so the cost isn't really much of a concern. Don't misunderstand that, I still see it as a hell of a lot of money!
Personally I would look for a used 70-210mm, just as sharp (maybe a touch sharper) internal zoom, FF ready, much faster AF speed. May take a while but worth it in the end.
The cheapest 60-250 on ebay at the moment is £649 and that has bits missing and no box or papers. There are some cheaper but they have faults mentioned plus they would be subject to import duty. So for a freshly serviced copy with a 12mth warranty £600 is about right I'd say. From what I've read sdm failure rates in the 60-250 don't seem as bad as the rest of the range, unless anyone knows differently.
Plus from SDM working perfectly in LV are we all sure its the SDM that is at fault?
Plus from SDM working perfectly in LV are we all sure its the SDM that is at fault?
I would be very, very surprised if the SDM motor is at fault. This sounds like a problem with information that the phase detection AF system (i.e. 'through the viewfinder' AF) needs from or sends to an SDM lens not being dealt with correctly (or at all) by the lens. Goodness knows what the cause might be, but £420 does sound a lot to pay for getting it fixed. Just out of interest, do you know what the seller meant by 'not working'? Is it the same as what you have found?
Good luck
Steve
My SDM works but 95% of the time I use it in manual focus so if my AF packed in, it wouldn't bother me. In life view I press the ok button to zoom the rear screen in, use the 4 way controls to alter where I'm zoomed in and looking and then manual focus the lens, pressing Ok again to return to 100% on the rear screen.
I suppose you have to weigh it up as repaired 'all in' the lens owes you £580 and the repair should come with a time period warranty. Currently new, its a £1300 lens
My outfit: K1ii - Pentax D FA 24-70mm f2.8 - Pentax DA* 300mm f4 - Pentax modified DA* 60-250mm f4 - Irix 15mm Firefly - Pentax FA 35mm - FA 50mm f1.4 - Tamron SP 90mm macro - Pentax AF 540 FGZ II
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He had pulled it out if his wardrobe about 18mths after putting it there, it wouldn't focus. He put it straight back and pulled out his 2nd copy and went about his day. After a good few years and a complete system change he found the lens again. As he didn't have a Pentax body to test it on it was sold as not working. Never tried to get it repaired, just put it on eBay.
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1596 posts
17 years
Pentaxia
I've just been given a quote from John Pye of £420 to repair my 60-250, is that a lot? And do you lads think it's worth it? I only paid £160 ish for the "mint" boxed lens off eBay. It was sold as not working. When I got it and fitted to the K1 it worked perfect in live view, did nothing when used "normally" it also worked perfectly on all my film bodies and the K10. I know all those are screw drive. The SDM motor works perfect in live view, snappy and quick, so I was perplexed as to why it wouldn't work through the viewfinder on the K1. Tried all the fixes I could find, left it attached to the body to charge the capacitor and all that with, obviously, no joy :/
Now I've read a few reviews and reports on this lens on the K1, but is it really as good as all that Lads? And is it worth removing the baffle or not? I don't mind a bit of vignette so had planned in leaving it in place.