[stevebrot]

On 15 March 2018 R01010 was registered, not R02010, and it was the Pentax K-1 II.

Sorry for the misunderstanding. Do you have the registration date for R 02010?


Steve

[stevebrot]

Hey Steve, Was this a stream of consciousness thing???

Just a summary of the speculations suggested to date in comparison to what is known as fact. I also inserted a bit of personal humor. It is good, after all, to stay on topic


Steve

[stevebrot]

@stevebrot K16000 as in a jubileum successor to the K1000 (with 1/16000 s max shutter speed, of course). And perhaps with a K* version of the DFA* 50/1.4.

OK...I will correct.

[stevebrot]

it shouldn't be a "flagship vs. consumer" thing, but more a "reliable vs. not" thing.

That is the strange part. My Super Program has an identical aperture control block that still functions nicely after 35 years. As has been discussed extensively on other threads, the failure appears to have been a materials issue in the parts conduit from an outside supplier.


Steve

[beachgardener]

Wild speculations so far:

That pretty much sums it up, anything else?

[torashi]

I wouldn't mind a 30m WR K-Beluga with a painful grip, BTW.

[Rush2112]

In this particular case, everybody agrees that something is coming, and the discussion is about what that something might be. I didn't understand the motivation behind his posting his comment and was hoping he would explain why he felt it was appropriate to act as "Capt Obvious".

Any reply without a quote would obviously be a reply to the OP. Sorry that I have to actually point that out to you.

In fact the first three replies to the OP didnt quote. So, perhaps you should look at the basics of forum posting and stop the harrassment.

[reh321]

Any reply without a quote would obviously be a reply to the OP. Sorry that I have to actually point that out to you.

In my experience, nine page threads usually don't work that way; thank you for such a gracious answer.

In fact the first three replies to the OP didnt quote

They weren't preceded by anything other than the OP ..... certainly not by eight pages of comments.

[reh321]

In fact the first three replies to the OP didnt quote. So, perhaps you should look at the basics of forum posting and stop the harrassment.

I'm sorry you think this is harassment,

I hope nobody here does harass you.

[Larrymc]

Now Boys y'all need to apologize and HUGG

[rangercarp]

As has been discussed extensively on other threads, the failure appears to have been a materials issue in the parts conduit from an outside supplier.

And if I remember right the problem was fixed. Have there been any reports of the problem in the K-70? Or the KS-2 for that matter? I am thinking it was late in K-50 production when it was fixed.

[reh321]

And if I remember right the problem was fixed. Have there been any reports of the problem in the K-70? Or the KS-2 for that matter? I am thinking it was late in K-50 production when it was fixed.

The Dark Image Syndrome started showing up on my K-30 after I had been using it for three years. I believe Pentax may have done something to alleviate the problem, but yes, people are reporting that issue {hopefully at a much lower rate} with K-S2 and K-70 bodies
Getting aperture control block on my K-S2 :( - PentaxForums.com
K-70 Underexposed Photo Reports - PentaxForums.com

[Not a Number]

The be pedantic the actual name of the G100 assembly is "Diaphragm Control Block". Or 0-G100 the "0-" means it is an assembly. The G100 differs greatly between the Super Program and G100 of the K-30/50. Major difference between the G100 is that the DSLR version is much larger wirth gears and a motor. The Super Program G100 uses springs, cams and levers.

The Diaphragm Control Block in the K-7,K-5, K-3 and presumably the K-1 and KP is part 0-G200. It is a different design then 0-G100 in either the Super Program or the other DSLRs

When ordering parts for Pentax/Hoya/Ricoh you would give the product number (camera) and part numbers. For the Super Program it would be 24500-0-G100, the K-50 would be 77750-0-G100. The parts service list shows interchangeable parts from different camera models.

It has yet to be seen if the K-70 uses the same G100 as the K-50.

The solenoid is part G119. It appears to be the same between all cameras that use the solenoid. From the K-30 on, however, the solenoid appears to be different, with green plastic vs white. Either the source of the solenoid changed the part or a different source is used. We don't know. We also don't know if the white solenoid was phased out altogether - it could be two sources were being used during production. One member reports buying the 0-G100 from USCamera with a manufacture date of 09/09/2017 that has a white solenoid.

The Diaphragm Control Block (0-G100) from Super Program - take from the Service Manual and Spares List:






The Diaphragm Control Block (0-G100) from various DSLRs:
K20D (note solenoid G119)

K10D


*istD

*istDS/DL


Note the wiring differences between the *ist models. Also the *istDs use a metal slide (aperture actuator) where as the K10D on uses a plastic/composite piece.

The 0-G200 from K-7 service manual and photos on USCamera




Note: Pentax/Hoya/Ricoh uses the term "Block" on many parts. These are all assemblies and in some cases "blocking" has nothing to do with the function. For example there is a "LCD Block", and "Viewfinder LCD Block". I think the mean it in the same way you can have "a block of code" or associated parts working together.

[stevebrot]

And if I remember right the problem was fixed. Have there been any reports of the problem in the K-70? Or the KS-2 for that matter? I am thinking it was late in K-50 production when it was fixed.

Your memory is correct, though there were some reports on the KS-2. There had been recent rumors of "several" similar issues with K-70 and as a response, a thread was set up to serve as a clearinghouse of sorts to dispel rumors and attempt to determine if there are credible cases of aperture block failure for that model.

K-70 Underexposed Photo Reports - PentaxForums.com


To date there are four reports from users on this site having problems with underexposed frames. Two have been confirmed as having aperture control problems and one has been sent in for service without confirming aperture control failure. None, so far, have confirmed failure of the aperture control block.


Steve

[stevebrot]

The be pedantic...

Thank you for your pedantry. While I generally tend to be the same, common usage on this site and other places on the Web is "aperture block" or "aperture control block", hence my use of those terms in communications on this site. I will update the K-70 thread's definitions section with your information.

One member reports buying the 0-G100 from USCamera with a manufacture date of 09/09/2017 that has a white solenoid.

Thank you also for reminding us that genuine Pentax replacement assemblies are available from the USCamera Web site.


Steve