Movie mode shutter/mirror

Tanzer · 05-09-2014, 11:52 AM

That is so bizarre.

Steve.Ledger · 05-09-2014, 12:26 PM

I reported same on PU and someone replied that they tried their Sigma 17-50/2.8 and also found that it doesn't do the mirror flip at f4.0 on the K-30.

Unless there's a sound technical reason, I'd say we're looking at a software bug.

SteveB · 05-09-2014, 01:47 PM

F4.0 works on the K-30 and Sigma 17-50/2.8 HSM .

richandfleur · 05-09-2014, 11:14 PM

Confirmed on my k-30 also, with the tamron 70-300 LD Di telephoto lens.

Totally weird but proves a point that it doesn't actually need to fire the shutter, but as above this is f4 occurrence is probably a software glitch.

Last edited by richandfleur; 05-10-2014 at 01:21 AM.

Steve.Ledger · 05-10-2014, 12:41 AM

My Sigma 30mm f1.4 also - silent start/stop at F4 only.

maltfalc · 05-20-2014, 08:48 PM

the aperture blades get stopped down to f/4 for live view. if you have the aperture set to anything but f/4 the mirror/aperture lever mechanism has to go through the rest of a cycle to switch to the new setting.

Steve.Ledger · 05-20-2014, 10:06 PM

Sounds plausible I suppose.
Except this doesn't happen with the K-7 and probably not the K-5/K-5ii which is why I didn't expect it to happen with the K-50.
Does it happen with the K-3? Because it's really annoying actually.

richandfleur · 05-20-2014, 10:15 PM

Originally posted by Steve.Ledger

Sounds plausible I suppose.
Except this doesn't happen with the K-7 and probably not the K-5/K-5ii which is why I didn't expect it to happen with the K-50.
Does it happen with the K-3? Because it's really annoying actually.

Based on the hacking thread these are quite different cameras software and processor wise. The newer K-30 upwards, so K-50 and K-3 are based on a different CPU type, so the concept of the code will be the same, but there will be differences. However it's likely to be a different take on how they should behave.

One could also ask why it's fixed at/defaults to f4 for liveview? I assume there is a reason, but ideally the screen should show what's actually going to be recorded?

Steve.Ledger · 05-21-2014, 12:30 AM

It has been said before when I mentioned the same thing re the K-01, that showing the movie exposure exactly as it will be recorded might render the preview hard to see in bright sun because you'd be stopped right down or using an ND filter, so the screen would be quite dark. So we have to rely on the exposure meter readout as the camera shows us max brightness
Would be good to have the 'option' to choose which movie recording preview method we want to use though.

richandfleur · 05-21-2014, 12:47 AM

Originally posted by Steve.Ledger

showing the movie exposure exactly as it will be recorded might render the preview hard to see in bright sun because you'd be stopped right down or using an ND filter, so the screen would be quite dark.

I guess my thought was that this was going to happen when you started recording and the actual aperture was set, so why the 'pretend' setting up front?

Steve.Ledger · 05-21-2014, 01:05 AM

Yep, I agree. I'd like the option to choose.

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05-09-2014, 11:52 AM	#16
Tanzer Veteran Member Join Date: Mar 2012 Location: Perrineville, NJ Posts: 1,375	That is so bizarre.

05-09-2014, 12:26 PM	#17
Steve.Ledger Veteran Member Join Date: Oct 2009 Location: Far North Qld Posts: 3,301 Original Poster	I reported same on PU and someone replied that they tried their Sigma 17-50/2.8 and also found that it doesn't do the mirror flip at f4.0 on the K-30. Unless there's a sound technical reason, I'd say we're looking at a software bug.

05-09-2014, 01:47 PM	#18
SteveB Veteran Member Join Date: Mar 2007 Location: U.K. Posts: 685	F4.0 works on the K-30 and Sigma 17-50/2.8 HSM .

05-09-2014, 11:14 PM	#19
richandfleur Pentaxian Join Date: Mar 2014 Location: Palmerston North, New Zealand Photos: Albums Posts: 1,788	Confirmed on my k-30 also, with the tamron 70-300 LD Di telephoto lens. Totally weird but proves a point that it doesn't actually need to fire the shutter, but as above this is f4 occurrence is probably a software glitch. Last edited by richandfleur; 05-10-2014 at 01:21 AM.

05-10-2014, 12:41 AM	#20
Steve.Ledger Veteran Member Join Date: Oct 2009 Location: Far North Qld Posts: 3,301 Original Poster	My Sigma 30mm f1.4 also - silent start/stop at F4 only.

05-20-2014, 08:48 PM	#21
maltfalc Veteran Member Join Date: May 2010 Location: Winnipeg Photos: Albums Posts: 396	the aperture blades get stopped down to f/4 for live view. if you have the aperture set to anything but f/4 the mirror/aperture lever mechanism has to go through the rest of a cycle to switch to the new setting.

05-20-2014, 10:06 PM	#22
Steve.Ledger Veteran Member Join Date: Oct 2009 Location: Far North Qld Posts: 3,301 Original Poster	Sounds plausible I suppose. Except this doesn't happen with the K-7 and probably not the K-5/K-5ii which is why I didn't expect it to happen with the K-50. Does it happen with the K-3? Because it's really annoying actually.

05-20-2014, 10:15 PM	#23
richandfleur Pentaxian Join Date: Mar 2014 Location: Palmerston North, New Zealand Photos: Albums Posts: 1,788	Originally posted by Steve.Ledger Sounds plausible I suppose. Except this doesn't happen with the K-7 and probably not the K-5/K-5ii which is why I didn't expect it to happen with the K-50. Does it happen with the K-3? Because it's really annoying actually. Based on the hacking thread these are quite different cameras software and processor wise. The newer K-30 upwards, so K-50 and K-3 are based on a different CPU type, so the concept of the code will be the same, but there will be differences. However it's likely to be a different take on how they should behave. One could also ask why it's fixed at/defaults to f4 for liveview? I assume there is a reason, but ideally the screen should show what's actually going to be recorded?

05-21-2014, 12:30 AM	#24
Steve.Ledger Veteran Member Join Date: Oct 2009 Location: Far North Qld Posts: 3,301 Original Poster	It has been said before when I mentioned the same thing re the K-01, that showing the movie exposure exactly as it will be recorded might render the preview hard to see in bright sun because you'd be stopped right down or using an ND filter, so the screen would be quite dark. So we have to rely on the exposure meter readout as the camera shows us max brightness Would be good to have the 'option' to choose which movie recording preview method we want to use though.

05-21-2014, 12:47 AM	#25
richandfleur Pentaxian Join Date: Mar 2014 Location: Palmerston North, New Zealand Photos: Albums Posts: 1,788	Originally posted by Steve.Ledger showing the movie exposure exactly as it will be recorded might render the preview hard to see in bright sun because you'd be stopped right down or using an ND filter, so the screen would be quite dark. I guess my thought was that this was going to happen when you started recording and the actual aperture was set, so why the 'pretend' setting up front?

05-21-2014, 01:05 AM	#26
Steve.Ledger Veteran Member Join Date: Oct 2009 Location: Far North Qld Posts: 3,301 Original Poster	Yep, I agree. I'd like the option to choose.