[i_trax]

Would any of you that have a K-70 please check to see if you can re-create this behavior on your camera?

Yes : K -70 , K - 5lls , K - s1 , K - 50 , K - 30 ,
No : K-3 , K - 3ll , KP , K - 1ll , K - 1 ,

they are obviously two different kind of cameras , still odd.
they have random lenses attached to them : DFA , DA and M

[i_trax]

oh ,
and K-01 , NO , it has no "non LV " mode.
K10D also NO , it has no "LV" mode.
the above comments are probably pretty obvious to the most Pentaxians.

[photogem]

Would any of you that have a K-70 please check to see if you can re-create this behavior on your camera? Please mount a lens, engage live view, and then just begin to un-mount the lens. Just a slight twist of the lens causes the shutter to close and live view to turn off on my camera. I have already ordered a replacement camera assuming my K-70 has some kind of electrical fault, so if you would please check to see if this is normal behavior for the K-70, I would really appreciate it!

Well, I don't have a K-70 anymore, but a few other ones.

Similar results as member i-trax:


Yes : K5lls, K-S1, K-S2*, K-50 , K-30,
-No : K-3, KP

*K-S2 is constructed the same way as the K-70.

I have to admit though: This was the very first time ever that I unmounted a lens with the body still switched on. But I know many do it without any problems, but for sure, you'd easier collect dust and debris.

I try to protect lenses with their front and back lids right away and if I need more time, the body cap is always in reach to protect the open k-mount.

It says clearly in the manuals under "Attaching a lens": 1. Make sure that the camera is turned off.

I think that particular those bodies which won't close the shutter are more prone to collect dust.

[jon.partsch]

Would any of you that have a K-70 please check to see if you can re-create this behavior on your camera?

Yes : K -70 , K - 5lls , K - s1 , K - 50 , K - 30 ,
No : K-3 , K - 3ll , KP , K - 1ll , K - 1 ,

they are obviously two different kind of cameras , still odd.
they have random lenses attached to them : DFA , DA and M

.......................
oh ,
and K-01 , NO , it has no "non LV " mode.
K10D also NO , it has no "LV" mode.
the above comments are probably pretty obvious to the most Pentaxians.

Yes, right the K-01 only hase Live View - no OVF. I just meant that un-mounting the lens while the camera is on has no effect (shutter stays open, and rear LCD stays on)

Well, I don't have a K-70 anymore, but a few other ones.

Similar results as member i-trax:


Yes : K5lls, K-S1, K-S2*, K-50 , K-30,
-No : K-3, KP

*K-S2 is constructed the same way as the K-70.

I have to admit though: This was the very first time ever that I unmounted a lens with the body still switched on. But I know many do it without any problems, but for sure, you'd easier collect dust and debris.

I try to protect lenses with their front and back lids right away and if I need more time, the body cap is always in reach to protect the open k-mount.

It says clearly in the manuals under "Attaching a lens": 1. Make sure that the camera is turned off.

I think that particular those bodies which won't close the shutter are more prone to collect dust.

Thanks, photogem. Just to clarify - I am not discussing or advocating actually removing a lens while the camera is on nor especially when Live View is active, I am just trying to diagnose trouble I had in using Live View with teleconverters on my K-70. I am trying to determine if the difficulties I experienced are a fault with the camera or part of the camera design.

~ Jon

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Last edited by jon.partsch; 05-01-2021 at 09:04 PM.

[i_trax]

I just meant that um-mounting the lens I am just trying to diagnose trouble I had in using Live view with teleconverters on my K-70. I am trying to determine if the difficulties I experienced are a fault with the camera or part of the camera design.

~ Jon

yes , that is obvious.
and Adaptall-2 PKA adaptors are getting older , I have number of them
they are becoming more intermittent with age , the problem more "visible" with large , heavy lenses
so , loosing connectivity with the attached lens will trigger disengaging of LV on your K-70

[photogem]

Please mount a lens, engage live view, and then just begin to un-mount the lens. Just a slight twist of the lens causes the shutter to close and live view to turn off on my camera. I have already ordered a replacement camera assuming my K-70 has some kind of electrical fault, so if you would please check to see if this is normal behavior for the K-70....

Thanks, photogem. Just to clarify - I am not discussing or advocating actually removing a lens while the camera is on nor especially when Live View is active, I am just trying to diagnose trouble I had in using Live View with teleconverters on my K-70. I am trying to determine if the difficulties I experienced are a fault with the camera or part of the camera design.

I was aware of that but just mentioned it was my first time ever removing a lens with the camera switched on.
The test could only be done in this way, particular to find out of the shutter closes in LV-mode when the lens is removed.

I have no more adaptall lenses/adapters. My last adaptall lens was the Tamron 90macro which I liked very much but the KA adapter made problems again and again with contacts. I had cleaned it very well, applied a good "contact-enhancer" (from Audio) which worked for a while but eventually I

gave up... also because I found a Ricoh P-105 with A-ring which was just more convenient. At the end this length is now covered by the D-FA100macroWR, a great lens.

I think everything is alright with your K-70.

[reduno]

The test could only be done in this way, particular to find out of the shutter closes in LV-mode when the lens is removed.

I just received the K-70 this morning and was able to confirm that with version 1.00 firmware, this camera also terminates live view when the lens is removed. I can also say that an old K-7 running firmware version 1.13, also behaves the same way and terminates live view. However, on a K-3 running firmware version 1.41, live view continues when the lens is removed.

With a little more investigation, I was able to determine it is the data pin that appears to trigger the termination of live view. The data pin is the gold contact on the camera closest to the AF screw drive. If I short the data pin to the mount before engaging live view, live view will terminate when the short is removed. Similarly, if I start live view first and then short the data pin, live view will again terminate. This is possibly a safer way of testing, as no lens actually needs to be attached.

[jon.partsch]

Adaptall-2 PKA adaptors are getting older , I have number of them
they are becoming more intermittent with age , the problem more "visible" with large , heavy lenses
so , loosing connectivity with the attached lens will trigger disengaging of LV on your K-70

I have no more adaptall lenses/adapters. My last adaptall lens was the Tamron 90macro which I liked very much but the KA adapter made problems again and again with contacts. I had cleaned it very well, applied a good "contact-enhancer" (from Audio) which worked for a while but eventually I gave up... also because I found a Ricoh P-105 with A-ring which was just more convenient. At the end this length is now covered by the D-FA100macroWR, a great lens.

I think everything is alright with your K-70.

Indeed these old PKA adapters are problematic. That's one of the reasons I have three of them. The D-FA 100mm macro WR is a great lens. I also have the Tamron 90mm autofocus macro 272E, which I understand is optically identical to the old Adaptall 90mm macro. It is really a special lens, and I will not give it up even though I also have D-FA 100mm.

The important think is that my K-70 seems to be working fine as intended (despite this little annoying "feature").

~ Jon

---------- Post added 05-02-21 at 11:18 AM ----------

I just received the K-70 this morning and was able to confirm that with version 1.00 firmware, this camera also terminates live view when the lens is removed. I can also say that an old K-7 running firmware version 1.13, also behaves the same way and terminates live view. However, on a K-3 running firmware version 1.41, live view continues when the lens is removed.

With a little more investigation, I was able to determine it is the data pin that appears to trigger the termination of live view. The data pin is the gold contact on the camera closest to the AF screw drive. If I short the data pin to the mount before engaging live view, live view will terminate when the short is removed. Similarly, if I start live view first and then short the data pin, live view will again terminate. This is possibly a safer way of testing, as no lens actually needs to be attached.

This is brilliant! Now I know the exact trigger for the disengagement of live view, and where I need to focus my attention if the problem occurs again.

Thank you!

~ Jon

[reduno]

Now I know the exact trigger for the disengagement of live view, and where I need to focus my attention if the problem occurs again.

I may have been a bit quick in blaming the data pin. I homed in on this pin as it is the extra one and not part of the original Ka mount configuration. Since posting initially, I have been doing some more testing on the K-70. Unfortunately, it appears doing the same thing to any of the contacts will cause live view to disengage. My apologies for jumping the gun on this one.

[jon.partsch]

I may have been a bit quick in blaming the data pin. I homed in on this pin as it is the extra one and not part of the original Ka mount configuration. Since posting initially, I have been doing some more testing on the K-70. Unfortunately, it appears doing the same thing to any of the contacts will cause live view to disengage. My apologies for jumping the gun on this one.

No worries! The important thing is that the camera is functioning as designed - so there is no defect. Thanks for your helpful input on this!

[reduno]

The important thing is that the camera is functioning as designed - so there is no defect.

Absolutely, your K-70 is behaving exactly the same as my old K-7 from 2010. I'm not certain why some models appear to behave differently but perhaps the firmware has two different development paths. One possibly originating from the Pentax/Hoya side and the other coming in when Ricoh acquired the brand. That may explain the apparent K-7, K-5, K-S1, K-S2, K-30, K-50, K-70 behavior, versus the K-3, K-1, Kp behavior. Just a thought.