Problem with the B setting and the Pentax shutter release cable

**KA5TXL** · 03-10-2018, 05:22 PM

When I put my K1 in "B" mode and try and use the Pentax shutter release cable it activates the shutter at somewhere around 1/125th, which when I press the shutter release on camera I get the same result. I have ruled out a problem with the cable as it works fine when I try it with my K20D. The K1 and the cable worked just fine in "B" mode last fall but that was before I upgraded the firmware. Any suggestions?

photoptimist · 03-10-2018, 05:33 PM

Check the Bulb Mode Options in menu C1.

**Ex Finn.** · 03-10-2018, 05:58 PM

Just tried wired shutter in B with FW 1.43 works OK. So it should not be a problem with firmware.

**KA5TXL** · 03-10-2018, 09:29 PM

Originally posted by photoptimist

Check the Bulb Mode Options in menu C1.

Thanks, I tried both options but it did not clear the problem. I have also done a reset but no change

**Bob 256** · 03-10-2018, 09:31 PM

If you're getting the same result with the shutter release on the camera, it isn't the cable but the camera itself (as you verified by trying the cable on another camera). Check the menu as photoptimist suggested. Also, this might be a dumb suggestion but check to make sure you're in bulb mode. It should show on the rear LCD (upper left - "Bulb"). Lastly, make sure your battery is up to snuff. If it's near the end of it's life, firing the shutter in bulb mode might be just enough to make the camera think the battery is dead or dying and shut down leading to a short exposure. Keeping the shutter open draws a bit more current and might be just enough to cause this issue if the battery is marginal.

**KA5TXL** · 03-11-2018, 12:25 PM - **1 Like**

Originally posted by Bob 256

If you're getting the same result with the shutter release on the camera, it isn't the cable but the camera itself (as you verified by trying the cable on another camera). Check the menu as photoptimist suggested. Also, this might be a dumb suggestion but check to make sure you're in bulb mode. It should show on the rear LCD (upper left - "Bulb"). Lastly, make sure your battery is up to snuff. If it's near the end of it's life, firing the shutter in bulb mode might be just enough to make the camera think the battery is dead or dying and shut down leading to a short exposure. Keeping the shutter open draws a bit more current and might be just enough to cause this issue if the battery is marginal.

Thanks everyone I have solved the issue, apparently my fat fingers had previously hit the EV button and knocked it off of 0.0, any value other than that will prevent B operation

03-10-2018, 05:22 PM	#1
KA5TXL Site Supporter Join Date: Mar 2008 Location: Dallas Photos: Gallery \| Albums Posts: 188	Problem with the B setting and the Pentax shutter release cable When I put my K1 in "B" mode and try and use the Pentax shutter release cable it activates the shutter at somewhere around 1/125th, which when I press the shutter release on camera I get the same result. I have ruled out a problem with the cable as it works fine when I try it with my K20D. The K1 and the cable worked just fine in "B" mode last fall but that was before I upgraded the firmware. Any suggestions?

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03-10-2018, 05:33 PM	#2
photoptimist Pentaxian Join Date: Jul 2016 Photos: Albums Posts: 5,126	Check the Bulb Mode Options in menu C1.

03-10-2018, 05:58 PM	#3
Ex Finn. Site Supporter Join Date: Nov 2007 Location: Southern Maryland. Espoo. Kouvola. Photos: Gallery \| Albums Posts: 7,975	Just tried wired shutter in B with FW 1.43 works OK. So it should not be a problem with firmware.

03-10-2018, 09:29 PM	#4
KA5TXL Site Supporter Join Date: Mar 2008 Location: Dallas Photos: Gallery \| Albums Posts: 188 Original Poster	Originally posted by photoptimist Check the Bulb Mode Options in menu C1. Thanks, I tried both options but it did not clear the problem. I have also done a reset but no change

03-10-2018, 09:31 PM	#5
Bob 256 Site Supporter Join Date: Jun 2008 Location: Idaho Photos: Gallery Posts: 2,375	If you're getting the same result with the shutter release on the camera, it isn't the cable but the camera itself (as you verified by trying the cable on another camera). Check the menu as photoptimist suggested. Also, this might be a dumb suggestion but check to make sure you're in bulb mode. It should show on the rear LCD (upper left - "Bulb"). Lastly, make sure your battery is up to snuff. If it's near the end of it's life, firing the shutter in bulb mode might be just enough to make the camera think the battery is dead or dying and shut down leading to a short exposure. Keeping the shutter open draws a bit more current and might be just enough to cause this issue if the battery is marginal.

03-11-2018, 12:25 PM - 1 Like	#6
KA5TXL Site Supporter Join Date: Mar 2008 Location: Dallas Photos: Gallery \| Albums Posts: 188 Original Poster	Originally posted by Bob 256 If you're getting the same result with the shutter release on the camera, it isn't the cable but the camera itself (as you verified by trying the cable on another camera). Check the menu as photoptimist suggested. Also, this might be a dumb suggestion but check to make sure you're in bulb mode. It should show on the rear LCD (upper left - "Bulb"). Lastly, make sure your battery is up to snuff. If it's near the end of it's life, firing the shutter in bulb mode might be just enough to make the camera think the battery is dead or dying and shut down leading to a short exposure. Keeping the shutter open draws a bit more current and might be just enough to cause this issue if the battery is marginal. Thanks everyone I have solved the issue, apparently my fat fingers had previously hit the EV button and knocked it off of 0.0, any value other than that will prevent B operation