Re: Speaking of SDM...
No need to apologize. Thanks for the tip! Cheers, Christine - Original Message - From: eckinator eckina...@gmail.com To: Pentax-Discuss Mail List pdml@pdml.net Sent: Wednesday, January 13, 2010 5:21 AM Subject: Re: Speaking of SDM... Sorry Christine, totally missed your question with the answer; yes, the advice is given for the 50-135 as well and there are some people saying for the others as well based on an assumption on which I cannot comment that part of the issue may be due to grease/fat degrading and causing the drive to go sticky. I would think this is nowadays no longer an issue with all the knowledge available how to make grease/fats to order with almost any conceivable property but I am not qualified in any technical way to say it is altogether BS either Sorry again Ecke 2010/1/13 eckinator eckina...@gmail.com: 2010/1/13 Christine Aguila cagu...@earthlink.net: Ecke--is this for just the 16-50? Or is this advice for the 50-135mm as well? Cheers, Christine Hi Christine, my understanding from my readings of failure stats published in the internet and the few official figures given locally by Pentax country offices / importers / first line distributors indicate return rates of roughly 1% for the 16-50 and half that for the the 50-135 which both sold in huge numbers explaining the number of complaints that surface on the web and thus the high profile of the issue. Some people are suggesting there will be SDM only G2 versions of both lenses in the not too distant future (not sure of those rumors myself) and that they are selling their lenses to wait for the revised version. I have no idea if that is true and I haven't a care in the world to lose any sleep over the issue until my new lens fails again or Pentax where it goes next week fails to adjust focal plane and lens alignment (lots of purple fringing and center to edge softness). Cheers Ecke -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Speaking of SDM...
2010/1/13 Christine Aguila cagu...@earthlink.net: Ecke--is this for just the 16-50? Or is this advice for the 50-135mm as well? Cheers, Christine Hi Christine, my understanding from my readings of failure stats published in the internet and the few official figures given locally by Pentax country offices / importers / first line distributors indicate return rates of roughly 1% for the 16-50 and half that for the the 50-135 which both sold in huge numbers explaining the number of complaints that surface on the web and thus the high profile of the issue. Some people are suggesting there will be SDM only G2 versions of both lenses in the not too distant future (not sure of those rumors myself) and that they are selling their lenses to wait for the revised version. I have no idea if that is true and I haven't a care in the world to lose any sleep over the issue until my new lens fails again or Pentax where it goes next week fails to adjust focal plane and lens alignment (lots of purple fringing and center to edge softness). Cheers Ecke -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Speaking of SDM...
Sorry Christine, totally missed your question with the answer; yes, the advice is given for the 50-135 as well and there are some people saying for the others as well based on an assumption on which I cannot comment that part of the issue may be due to grease/fat degrading and causing the drive to go sticky. I would think this is nowadays no longer an issue with all the knowledge available how to make grease/fats to order with almost any conceivable property but I am not qualified in any technical way to say it is altogether BS either Sorry again Ecke 2010/1/13 eckinator eckina...@gmail.com: 2010/1/13 Christine Aguila cagu...@earthlink.net: Ecke--is this for just the 16-50? Or is this advice for the 50-135mm as well? Cheers, Christine Hi Christine, my understanding from my readings of failure stats published in the internet and the few official figures given locally by Pentax country offices / importers / first line distributors indicate return rates of roughly 1% for the 16-50 and half that for the the 50-135 which both sold in huge numbers explaining the number of complaints that surface on the web and thus the high profile of the issue. Some people are suggesting there will be SDM only G2 versions of both lenses in the not too distant future (not sure of those rumors myself) and that they are selling their lenses to wait for the revised version. I have no idea if that is true and I haven't a care in the world to lose any sleep over the issue until my new lens fails again or Pentax where it goes next week fails to adjust focal plane and lens alignment (lots of purple fringing and center to edge softness). Cheers Ecke -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Speaking of SDM...
Hate to say so John but that is how the trouble started on my 1st 16-50 (also frequent forum opinion). After I had the sdm motor replaced, it was the first thing again so I returned it to Pentax for a NIB replacement. The 2nd 16-50 is now my always on, mainly because I like the lens but also forums say if you want to be sure your sdm motor is ok, use the lens often, both to provoke the next failure and in case it needs a regular workout. I've also read people state their belief that this whole thing is a misalignment issue at the coupling of screwdrive and sdm. Please take the latter as hearsay. If you want my opinion, make sure you return it for repair (and perhaps realignment) before the warranty runs out. Better safe than sorry. Good luck Ecke 2010/1/12 John Celio n...@neovenator.com: Does anyone else notice a warm up period between mounting an SDM lens and when the AF starts functioning? Whenever I put my 16-50 on my K10D, it takes between 5 and 15 (guestimate) seconds for the AF to start working. I should note that I don't use the lens very often, since my DA21 is my walk-around lens. Could this be some sort of defect, or is it just the electronics warming up/charging? John -- http://www.neovenator.com http://www.cafepress.com/jacelio -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Speaking of SDM...
On 13/01/2010, eckinator eckina...@gmail.com wrote: Hate to say so John but that is how the trouble started on my 1st 16-50 (also frequent forum opinion). These SDM lenses might have great optics but the number of stories relating to failures keeps me well away, I just don't need the grief. I'm so glad people air their frustrations on public fora like this. It must be a nightmare for companies that used to get away with snubbing off owners of equipment with systemic failures by denying that the problems were commonplace. -- Rob Studdert (Digital Image Studio) Tel: +61-418-166-870 UTC +10 Hours Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Speaking of SDM...
On Jan 12, 2010, at 6:52 PM, Rob Studdert wrote: On 13/01/2010, eckinator eckina...@gmail.com wrote: Hate to say so John but that is how the trouble started on my 1st 16-50 (also frequent forum opinion). These SDM lenses might have great optics but the number of stories relating to failures keeps me well away, I just don't need the grief. I'm so glad people air their frustrations on public fora like this. It must be a nightmare for companies that used to get away with snubbing off owners of equipment with systemic failures by denying that the problems were commonplace. I easily have 20,000 exposures on my three SDM Pentax lenses, with no problems. That's just one case, so it proves nothing, but I'm very satisfied. Paul -- Rob Studdert (Digital Image Studio) Tel: +61-418-166-870 UTC +10 Hours Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Speaking of SDM...
- Original Message - From: paul stenquist Subject: Re: Speaking of SDM... I easily have 20,000 exposures on my three SDM Pentax lenses, with no problems. That's just one case, so it proves nothing, but I'm very satisfied. Go over to ForumsNeurotica and read some of the SDM threads. You'll consider yourself lucky. William Robb -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Speaking of SDM...
On 13/01/2010, paul stenquist pnstenqu...@comcast.net wrote: I easily have 20,000 exposures on my three SDM Pentax lenses, with no problems. That's just one case, so it proves nothing, but I'm very satisfied. Paul That's great Paul, you were fortunate enough to get good ones, I too had a problem that didn't exist on my K10D (misaligned mirror which screwed up the level and AF). Fortunately I found over 150 other K10D users on various forums that made extremely similar claims about issues that they had with their K10D so with much insistence I finally had it rectified (it was in the hands of the repairers for over 100 days in three trips). Having a bad experience like that hones your sensitivity to these sorts of problems. -- Rob Studdert (Digital Image Studio) Tel: +61-418-166-870 UTC +10 Hours Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Speaking of SDM...
Rob wrote: Having a bad experience like that hones your sensitivity to these sorts of problems. I've always felt you were sensitive... Tom On Tue, Jan 12, 2010 at 5:13 PM, Rob Studdert distudio.p...@gmail.com wrote: On 13/01/2010, paul stenquist pnstenqu...@comcast.net wrote: I easily have 20,000 exposures on my three SDM Pentax lenses, with no problems. That's just one case, so it proves nothing, but I'm very satisfied. Paul That's great Paul, you were fortunate enough to get good ones, I too had a problem that didn't exist on my K10D (misaligned mirror which screwed up the level and AF). Fortunately I found over 150 other K10D users on various forums that made extremely similar claims about issues that they had with their K10D so with much insistence I finally had it rectified (it was in the hands of the repairers for over 100 days in three trips). Having a bad experience like that hones your sensitivity to these sorts of problems. -- Rob Studdert (Digital Image Studio) Tel: +61-418-166-870 UTC +10 Hours Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Speaking of SDM...
On 13/01/2010, Tom C caka...@gmail.com wrote: Rob wrote: Having a bad experience like that hones your sensitivity to these sorts of problems. I've always felt you were sensitive... You can call me whatever you like but just don't tell me my camera gear's not fcked when it is ;-) -- Rob Studdert (Digital Image Studio) Tel: +61-418-166-870 UTC +10 Hours Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Speaking of SDM...
ROTFLMAO. On Tue, Jan 12, 2010 at 5:57 PM, Rob Studdert distudio.p...@gmail.com wrote: On 13/01/2010, Tom C caka...@gmail.com wrote: Rob wrote: Having a bad experience like that hones your sensitivity to these sorts of problems. I've always felt you were sensitive... You can call me whatever you like but just don't tell me my camera gear's not fcked when it is ;-) -- Rob Studdert (Digital Image Studio) Tel: +61-418-166-870 UTC +10 Hours Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Speaking of SDM...
2010/1/13 William Robb war...@gmail.com: Go over to ForumsNeurotica and read some of the SDM threads. You'll consider yourself lucky. to be fair, i also found threads indicating for the 1st gen DA*s (16-50, 50-135) sdm related failure rates of approx 1% which doesn't sounds too bad but is actually quite bad -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Speaking of SDM...
Thanks for your comments, everyone. I sent Pentax an email about my SDM issue, and also mentioned that time last year when the zoom locked up and didn't work until I twisted off the lens hood. I imagine this lens has been a lemon from the start, I was just being blissfully ignorant about it. The glass itself is amazing, so I've been hesitant to part with it, even for a few weeks. John -- http://www.neovenator.com http://www.cafepress.com/jacelio -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Speaking of SDM...
On Jan 12, 2010, at 16:01 , William Robb wrote: - Original Message - From: paul stenquist Subject: Re: Speaking of SDM... I easily have 20,000 exposures on my three SDM Pentax lenses, with no problems. That's just one case, so it proves nothing, but I'm very satisfied. Go over to ForumsNeurotica and read some of the SDM threads. You'll consider yourself lucky. William Robb Forums such as this are mostly populated by those with problems and/or complaints. PDML is no exception, though the tone is more civil. It is rare that we get into it like they do over at Pentaf**k**u. As such, those without equipment failures, or who know a few things about photography, or are too busy being photographers to whine, never have their opinions aired, their successes championed. But, for the record, none of my Pentax digital gear has failed in any way in the 5 years I've owned them. In 40+ years of Pentax, I've had 2 LX bodies CLA'd, one lens repaired for physical damage from dropping, and tossed another lens in the trash for element separation. All my other digital or electronically designed photo and video equipment is dead. Joseph McAllister pentax...@mac.com The Big Bang was silent, and probably invisible. — from the Pentaxian's thoughts on particle physics, so far. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Speaking of SDM...
- Original Message - From: eckinator eckina...@gmail.com The 2nd 16-50 is now my always on, mainly because I like the lens but also forums say if you want to be sure your sdm motor is ok, use the lens often, both to provoke the next failure and in case it needs a regular workout. I've also read people state their belief that this whole thing is a misalignment issue at the coupling of screwdrive and sdm. Please take the latter as hearsay. Ecke--is this for just the 16-50? Or is this advice for the 50-135mm as well? Cheers, Christine -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
