645z Shutter inconsistent.... Why is that?

TjallingPhotography · 08-20-2020, 10:18 AM

Hello, I have a question related to the 645Z

The shutter is not consistent and "hesitates" now and then. See Video in attachment (its on high speed burst mode, but it happens in slow mode too.

Anyone know this and has a suggestion or remedy?

I live in Ontario/ Canada so if it needs repair, a service address suggestion is also very much welcome

Thank you

Tjalling

**sergysergy** · 08-20-2020, 10:31 AM - **1 Like**

I don't see any attachments

**rdenney** · 08-20-2020, 01:11 PM - **1 Like**

Slow memory card?

Rick “guessing—also didn’t see any attachments” Denney

Adam · 08-20-2020, 02:09 PM - **1 Like**

In the absence of the video, my generic advice would be to switch to manual focus (or AF.C), disable distortion corrections if shooting JPEG, and disabling multi-card writing. That should allow you to narrow down the source of the issue to find out whether or not there is a mechanical problem.

As for repair facilities, please refer to the sticky in the repairs forum

Adam
PentaxForums.com Webmaster (Site Usage Guide | Site Help | My Photography)

PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

TjallingPhotography · 08-20-2020, 03:41 PM

Thank for the replies - I had/ have trouble with adding the attachment Even in the smallest seize (video or even only a sound file) it won't accept it (invalid file)

I am going to follow Adam's advice first. If not I'll let you know. Again appreciated! Tjalling

Adam · 08-20-2020, 05:55 PM

Originally posted by TjallingPhotography

Thank for the replies - I had/ have trouble with adding the attachment Even in the smallest seize (video or even only a sound file) it won't accept it (invalid file)

I am going to follow Adam's advice first. If not I'll let you know. Again appreciated! Tjalling

The easiest way to share a video is probably using youtube. Just paste the link here and it will automatically turn into an embedded video.

**bobbotron** · 08-20-2020, 07:13 PM

How old is the battery? My k3 can act a bit funny when the battery is almost empty.

MFullana · 08-24-2020, 05:39 AM - **1 Like**

I had the same problem and had a local shop that works on Pentax medium format cameras repair it. Basically the mirror assembly starts to hang up, and it's due to the lubricant drying out. The repair is simple and cost me about $250

**TDvN57** · 08-24-2020, 07:30 AM

Could it be the setting for in-focus requirement for shutter release in the C menus? Sorry I can't remember the actual menu item description. Might be worth checking.

08-20-2020, 10:18 AM	#1
TjallingPhotography New Member Join Date: Apr 2018 Location: Ontario, Canada Posts: 15	645z Shutter inconsistent.... Why is that? Hello, I have a question related to the 645Z The shutter is not consistent and "hesitates" now and then. See Video in attachment (its on high speed burst mode, but it happens in slow mode too. Anyone know this and has a suggestion or remedy? I live in Ontario/ Canada so if it needs repair, a service address suggestion is also very much welcome Thank you Tjalling

08-20-2020, 05:55 PM	#6
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,597	Originally posted by TjallingPhotography Thank for the replies - I had/ have trouble with adding the attachment Even in the smallest seize (video or even only a sound file) it won't accept it (invalid file) I am going to follow Adam's advice first. If not I'll let you know. Again appreciated! Tjalling The easiest way to share a video is probably using youtube. Just paste the link here and it will automatically turn into an embedded video. Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Pentax ME - inconsistent shutter speeds	Stuart_Zimble	Troubleshooting and Beginner Help	10	07-18-2019 03:25 AM
Inconsistent exposures in Aperture Priority with K-1	CoreyC	Pentax Full Frame	13	05-30-2019 09:21 AM
Inconsistent shutter speed	Rod Ramsell	Visitors' Center	3	06-05-2017 07:49 PM
Inconsistent "3 second delay" when using remote control shutter trigger	seventysixersfan	Troubleshooting and Beginner Help	9	05-01-2014 08:16 AM
645: Inconsistent shutter speed?	klaus123	Pentax Medium Format	9	09-01-2011 12:57 PM

08-20-2020, 10:31 AM - 1 Like	#2
sergysergy Site Supporter Join Date: Jan 2011 Photos: Gallery Posts: 5,175	I don't see any attachments

08-20-2020, 01:11 PM - 1 Like	#3
rdenney Site Supporter Join Date: Feb 2018 Location: NoVA Posts: 635	Slow memory card? Rick “guessing—also didn’t see any attachments” Denney

08-20-2020, 02:09 PM - 1 Like	#4
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,597	In the absence of the video, my generic advice would be to switch to manual focus (or AF.C), disable distortion corrections if shooting JPEG, and disabling multi-card writing. That should allow you to narrow down the source of the issue to find out whether or not there is a mechanical problem. As for repair facilities, please refer to the sticky in the repairs forum Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

08-20-2020, 03:41 PM	#5
TjallingPhotography New Member Join Date: Apr 2018 Location: Ontario, Canada Posts: 15 Original Poster	Thank for the replies - I had/ have trouble with adding the attachment Even in the smallest seize (video or even only a sound file) it won't accept it (invalid file) I am going to follow Adam's advice first. If not I'll let you know. Again appreciated! Tjalling

08-20-2020, 07:13 PM	#7
bobbotron Site Supporter Join Date: Jan 2015 Location: Ottawa, ON Photos: Gallery Posts: 3,349	How old is the battery? My k3 can act a bit funny when the battery is almost empty.

08-24-2020, 05:39 AM - 1 Like	#8
MFullana Forum Member Join Date: Apr 2018 Photos: Albums Posts: 54	I had the same problem and had a local shop that works on Pentax medium format cameras repair it. Basically the mirror assembly starts to hang up, and it's due to the lubricant drying out. The repair is simple and cost me about $250

08-24-2020, 07:30 AM	#9
TDvN57 Loyal Site Supporter Join Date: Jul 2011 Location: Berlin Photos: Gallery Posts: 1,150	Could it be the setting for in-focus requirement for shutter release in the C menus? Sorry I can't remember the actual menu item description. Might be worth checking.