K70 aperture block?

SharkyCA · 09-23-2020, 11:09 AM

Originally posted by photogem

I forgot that you got back your diaphragm control block. So it was manufactured 7/2019 and installed 8/2019.

Shows how high the demand for the K70 must have been, as you bought it 9/2019.

Anyway reh321's comparison with his K-30 are of no value compared to the K-70 because the K30 and K50 up to Dec.2015 were really badly hit with the solenoid problem.

I think he meant more my speculation.
But your statements are just kind of facts for your K30 and yet, you never opened it, never inspected the solenoid allthough you are an engineer with experience.
But your statements about the solenoid in the K70 are not at all facts but speculation.

Yes I was refering to your speculation Photogem not reh321's and no the manufacture date of my camera was as stated in the EXIF file 2017, as was the original control block. I have no reference to the control block in the camera now.

**photogem** · 09-23-2020, 01:21 PM

Originally posted by SharkyCA

Yes I was refering to your speculation Photogem not reh321's and no the manufacture date of my camera was as stated in the EXIF file 2017, as was the original control block. I have no reference to the control block in the camera now.

I corrected that, it was a typo... I meant 2017 of course and not 2019 ... the dates on the diaphragm control block you got back clearly states those two dates.

reh321 · 09-28-2020, 10:14 AM

Originally posted by photogem

But your statements are just kind of facts for your K30 and yet, you never opened it, never inspected the solenoid allthough you are an engineer with experience.
But your statements about the solenoid in the K70 are not at all facts but speculation.

My statements about the K-70 are fact.
We know that aperture control remains a weak spot of that line.
We know that when people have problems with that line the problem originates most of the time with the solenoid.
We know that the body's aperture control fails from passing of calendar time, that heavy usage is not an issue.

**photogem** · 09-28-2020, 11:33 AM

Originally posted by reh321

My statements about the K-70 are fact.

So what to you is the difference between collected knowledge, experience and as a result... facts?
Can you really declare statements about the aperture control of the K-70, never having owned one, never ever disassembled one and studied the aperture control?
And what is the same difference about the solenoid?

Making one's own statements to facts when one actually has zero exerience with it seems rather critical to me.
But then:

Originally posted by reh321

We know that aperture control remains a weak spot of that line.
We know that when people have problems with that line the problem originates most of the time with the solenoid.
We know that the body's aperture control fails from passing of calendar time, that heavy usage is not an issue.

I don't think you should speak here for everybody, i.e. "we"....

... maybe better to write "I ... re321...think I know"

but then, do you really know never having owned a K70, never disassembled it nor ever having held a solenoid in one's hands and having applied tests to it?
Is this the basis for facts or just hearsay?

You do know, that your own K30 has the aperture-control-problem.
And you have collected a lot of data.

**Kevin B123** · 09-28-2020, 12:14 PM

Originally posted by photogem

Originally posted by reh321*
We know that aperture control remains a weak spot of that line.
We know that when people have problems with that line the problem originates most of the time with the solenoid.
We know that the body's aperture control fails from passing of calendar time, that heavy usage is not an issue.
I don't think you should speak here for everybody, i.e. "we"....

... maybe better to write "I ... re321...think I know"

but then, do you really know never having owned a K70, never disassembled it nor ever having held a solenoid in one's hands and having applied tests to it?
Is this the basis for facts or just hearsay?

With respect, the jury has returned on this one and it is as re321 says.

It is inconceivable that an aperture failure on a K-70, however rare that may be, would be any other cause.

Unregistered User 8 · 09-29-2020, 01:44 AM - **3 Likes**

Hi folks. The debate is starting to get a little personal, which doesn't usually end well for anyone. Please calm down. Thanks

reh321 · 09-29-2020, 09:45 AM

Originally posted by photogem

I don't think you should speak here for everybody, i.e. "we"....

... maybe better to write "I ... re321...think I know"

but then, do you really know never having owned a K70, never disassembled it nor ever having held a solenoid in one's hands and having applied tests to it?
Is this the basis for facts or just hearsay?

You do know, that your own K30 has the aperture-control-problem.
And you have collected a lot of data.

OK, I should have said "Those who are watching reports from K-70 users know" - because those reports appears on these very pages.
Yes, these reports are "hearsay", but I do not believe these reports are false, and nobody has claimed that they are "fake news".
One does not need to have ever held a K-70 to read these reports.

**Kevin B123** · 09-29-2020, 10:04 AM

The K-70 has been around for 4 years now, it's time for a K-70 specific poll on ABF to gauge the true extent of it in this model. I suspect it is rare.

reh321 · 09-29-2020, 10:40 AM

Originally posted by Kevin B123

The K-70 has been around for 4 years now, it's time for a K-70 specific poll on ABF to gauge the true extent of it in this model. I suspect it is rare.

It undoubtedly is more rare than it was for the K-30 - it would almost have to be - but it does happen and probably should be the first thing to investigate when dark images do happen.

mblanc · 10-01-2020, 09:43 AM

I'm curious about the discussion of manufacture dates above. Was there some date where they started using the white solenoid instead of the green one? If so, when? Thanks.

**ehrwien** · 10-01-2020, 09:49 AM

Originally posted by mblanc

Was there some date where they started using the white solenoid instead of the green one? If so, when?

Highly dubious because the white ones are out of production since at least 2012 (?). It is suspected that they changed something else around the solenoid itself from a later run of the K-70 which makes it less likely to fail (?)

**photogem** · 10-01-2020, 12:43 PM

Originally posted by mblanc

I'm curious about the discussion of manufacture dates above. Was there some date where they started using the white solenoid instead of the green one? If so, when? Thanks.

Why?

reh321 · 10-01-2020, 01:27 PM

Originally posted by mblanc

I'm curious about the discussion of manufacture dates above. Was there some date where they started using the white solenoid instead of the green one? If so, when? Thanks.

Do you have any evidence that they did start using the white solenoids again?
As far as I know, they used the white solenoids at first, and then used the green ones.
The difference in colors corresponded to a change in materials which happened when location of manufacture changed.

mblanc · 10-01-2020, 03:01 PM

OK, thanks. I keep reading about people switching to the white ones, so I was thinking that that the white one was developed to fix the problem with the green one.

mblanc · 10-01-2020, 04:14 PM

To answer photogem, I'm curious because I have one that was manufactured 11/15/2018, and I'm wondering how worried I should be. Thanks.

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09-23-2020, 11:09 AM	#61
SharkyCA Pentaxian Join Date: Sep 2017 Location: Carleton Place, Ontario, Canada Photos: Gallery Posts: 806	Originally posted by photogem I forgot that you got back your diaphragm control block. So it was manufactured 7/2019 and installed 8/2019. Shows how high the demand for the K70 must have been, as you bought it 9/2019. Anyway reh321's comparison with his K-30 are of no value compared to the K-70 because the K30 and K50 up to Dec.2015 were really badly hit with the solenoid problem. I think he meant more my speculation. But your statements are just kind of facts for your K30 and yet, you never opened it, never inspected the solenoid allthough you are an engineer with experience. But your statements about the solenoid in the K70 are not at all facts but speculation. Yes I was refering to your speculation Photogem not reh321's and no the manufacture date of my camera was as stated in the EXIF file 2017, as was the original control block. I have no reference to the control block in the camera now.

09-23-2020, 01:21 PM	#62
photogem Site Supporter Join Date: Apr 2015 Posts: 3,522	Originally posted by SharkyCA Yes I was refering to your speculation Photogem not reh321's and no the manufacture date of my camera was as stated in the EXIF file 2017, as was the original control block. I have no reference to the control block in the camera now. I corrected that, it was a typo... I meant 2017 of course and not 2019 ... the dates on the diaphragm control block you got back clearly states those two dates.

09-28-2020, 10:14 AM	#63
reh321 Pentaxian Join Date: Nov 2014 Location: South Bend, IN, USA Photos: Gallery \| Albums Posts: 23,185	Originally posted by photogem But your statements are just kind of facts for your K30 and yet, you never opened it, never inspected the solenoid allthough you are an engineer with experience. But your statements about the solenoid in the K70 are not at all facts but speculation. My statements about the K-70 are fact. We know that aperture control remains a weak spot of that line. We know that when people have problems with that line the problem originates most of the time with the solenoid. We know that the body's aperture control fails from passing of calendar time, that heavy usage is not an issue.

09-28-2020, 11:33 AM	#64
photogem Site Supporter Join Date: Apr 2015 Posts: 3,522	Originally posted by reh321 My statements about the K-70 are fact. So what to you is the difference between collected knowledge, experience and as a result... facts? Can you really declare statements about the aperture control of the K-70, never having owned one, never ever disassembled one and studied the aperture control? And what is the same difference about the solenoid? Making one's own statements to facts when one actually has zero exerience with it seems rather critical to me. But then: Originally posted by reh321 We know that aperture control remains a weak spot of that line. We know that when people have problems with that line the problem originates most of the time with the solenoid. We know that the body's aperture control fails from passing of calendar time, that heavy usage is not an issue. I don't think you should speak here for everybody, i.e. "we".... ... maybe better to write "I ... re321...think I know" but then, do you really know never having owned a K70, never disassembled it nor ever having held a solenoid in one's hands and having applied tests to it? Is this the basis for facts or just hearsay? You do know, that your own K30 has the aperture-control-problem. And you have collected a lot of data.

09-28-2020, 12:14 PM	#65
Kevin B123 Loyal Site Supporter Join Date: Jul 2016 Location: Hampshire Photos: Gallery \| Albums Posts: 3,187	Originally posted by photogem Originally posted by reh321* We know that aperture control remains a weak spot of that line. We know that when people have problems with that line the problem originates most of the time with the solenoid. We know that the body's aperture control fails from passing of calendar time, that heavy usage is not an issue. I don't think you should speak here for everybody, i.e. "we".... ... maybe better to write "I ... re321...think I know" but then, do you really know never having owned a K70, never disassembled it nor ever having held a solenoid in one's hands and having applied tests to it? Is this the basis for facts or just hearsay? With respect, the jury has returned on this one and it is as re321 says. It is inconceivable that an aperture failure on a K-70, however rare that may be, would be any other cause.

09-29-2020, 01:44 AM - 3 Likes	#66
Unregistered User 8 Closed Account Join Date: Mar 2015 Photos: Gallery Posts: 8,694	Hi folks. The debate is starting to get a little personal, which doesn't usually end well for anyone. Please calm down. Thanks

09-29-2020, 09:45 AM	#67
reh321 Pentaxian Join Date: Nov 2014 Location: South Bend, IN, USA Photos: Gallery \| Albums Posts: 23,185	Originally posted by photogem I don't think you should speak here for everybody, i.e. "we".... ... maybe better to write "I ... re321...think I know" but then, do you really know never having owned a K70, never disassembled it nor ever having held a solenoid in one's hands and having applied tests to it? Is this the basis for facts or just hearsay? You do know, that your own K30 has the aperture-control-problem. And you have collected a lot of data. OK, I should have said "Those who are watching reports from K-70 users know" - because those reports appears on these very pages. Yes, these reports are "hearsay", but I do not believe these reports are false, and nobody has claimed that they are "fake news". One does not need to have ever held a K-70 to read these reports.

09-29-2020, 10:04 AM	#68
Kevin B123 Loyal Site Supporter Join Date: Jul 2016 Location: Hampshire Photos: Gallery \| Albums Posts: 3,187	The K-70 has been around for 4 years now, it's time for a K-70 specific poll on ABF to gauge the true extent of it in this model. I suspect it is rare.

09-29-2020, 10:40 AM	#69
reh321 Pentaxian Join Date: Nov 2014 Location: South Bend, IN, USA Photos: Gallery \| Albums Posts: 23,185	Originally posted by Kevin B123 The K-70 has been around for 4 years now, it's time for a K-70 specific poll on ABF to gauge the true extent of it in this model. I suspect it is rare. It undoubtedly is more rare than it was for the K-30 - it would almost have to be - but it does happen and probably should be the first thing to investigate when dark images do happen.

10-01-2020, 09:43 AM	#70
mblanc Veteran Member Join Date: Jun 2010 Photos: Albums Posts: 555	I'm curious about the discussion of manufacture dates above. Was there some date where they started using the white solenoid instead of the green one? If so, when? Thanks.

10-01-2020, 09:49 AM	#71
ehrwien Site Supporter Join Date: May 2016 Posts: 2,784	Originally posted by mblanc Was there some date where they started using the white solenoid instead of the green one? If so, when? Highly dubious because the white ones are out of production since at least 2012 (?). It is suspected that they changed something else around the solenoid itself from a later run of the K-70 which makes it less likely to fail (?)

10-01-2020, 12:43 PM	#72
photogem Site Supporter Join Date: Apr 2015 Posts: 3,522	Originally posted by mblanc I'm curious about the discussion of manufacture dates above. Was there some date where they started using the white solenoid instead of the green one? If so, when? Thanks. Why?

10-01-2020, 01:27 PM	#73
reh321 Pentaxian Join Date: Nov 2014 Location: South Bend, IN, USA Photos: Gallery \| Albums Posts: 23,185	Originally posted by mblanc I'm curious about the discussion of manufacture dates above. Was there some date where they started using the white solenoid instead of the green one? If so, when? Thanks. Do you have any evidence that they did start using the white solenoids again? As far as I know, they used the white solenoids at first, and then used the green ones. The difference in colors corresponded to a change in materials which happened when location of manufacture changed.

10-01-2020, 03:01 PM	#74
mblanc Veteran Member Join Date: Jun 2010 Photos: Albums Posts: 555	OK, thanks. I keep reading about people switching to the white ones, so I was thinking that that the white one was developed to fix the problem with the green one.

10-01-2020, 04:14 PM	#75
mblanc Veteran Member Join Date: Jun 2010 Photos: Albums Posts: 555	To answer photogem, I'm curious because I have one that was manufactured 11/15/2018, and I'm wondering how worried I should be. Thanks.