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Julian W · 10-14-2013, 10:34 AM

Upon occasion, my D-7 simply refuses to take a shot. After changing various settings, I discovered that it is linked to the autofocus, i.e. putting the camera on manual focuses allows me to take the picture. I am usually shooting with a Tamron 28-300 mm lens. Any insight into what may cause this?

Adam · 10-14-2013, 11:06 AM

Low battery voltage perhaps?

Julian W · 10-14-2013, 11:58 AM

I don't recall having to change battery soon afterwards. I jsut take other pictures with no problem. Or turn off autofocus and take this one. My suspicion is that the autofocus is confused (for example, by a long receding central line), but ti doesn't appear to be hunting.

Adam · 10-14-2013, 12:08 PM

Originally posted by Julian W

I don't recall having to change battery soon afterwards. I jsut take other pictures with no problem. Or turn off autofocus and take this one. My suspicion is that the autofocus is confused (for example, by a long receding central line), but ti doesn't appear to be hunting.

Well, my camera has frozen on me due to low voltage, even if the battery isn't run completely dry. Can you consistently reproduce the issue on your end?

Adam
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Julian W · 10-14-2013, 12:15 PM

Haven't tried. I don't think so. Right now, I don't have any low batteries. But I'll try to experiment when my current battery runs low. You're right that it sounds like a lack of power. Someone on dpreview (who never resumed the thread) said several possible settings could produce behavior like this, and asked if the lens hunted. I didn't recall that it had. (There was a long pause before I replied...apparently too long.)

**Ex Finn.** · 10-15-2013, 06:35 PM

Sounds like your cam is set to release shutter after confirming focus. No focus confirmation in AF= no shutter release, time to read the owners manual.

p.s. That Tamron could also be the culprit, try an other lens and see if it works better.

Julian W · 10-17-2013, 07:23 AM

too bad. It sounded good.

10-14-2013, 10:34 AM	#1
Julian W Guest	D-7 shutter button freezes Upon occasion, my D-7 simply refuses to take a shot. After changing various settings, I discovered that it is linked to the autofocus, i.e. putting the camera on manual focuses allows me to take the picture. I am usually shooting with a Tamron 28-300 mm lens. Any insight into what may cause this?

10-14-2013, 11:06 AM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	Low battery voltage perhaps? 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:

10-14-2013, 11:58 AM	#3
Julian W Guest	I don't think so I don't recall having to change battery soon afterwards. I jsut take other pictures with no problem. Or turn off autofocus and take this one. My suspicion is that the autofocus is confused (for example, by a long receding central line), but ti doesn't appear to be hunting.

10-14-2013, 12:15 PM	#5
Julian W Guest	Good question Haven't tried. I don't think so. Right now, I don't have any low batteries. But I'll try to experiment when my current battery runs low. You're right that it sounds like a lack of power. Someone on dpreview (who never resumed the thread) said several possible settings could produce behavior like this, and asked if the lens hunted. I didn't recall that it had. (There was a long pause before I replied...apparently too long.)

10-15-2013, 06:35 PM	#6
Ex Finn. Site Supporter Join Date: Nov 2007 Location: Southern Maryland. Espoo. Kouvola. Photos: Gallery \| Albums Posts: 7,975	Sounds like your cam is set to release shutter after confirming focus. No focus confirmation in AF= no shutter release, time to read the owners manual. p.s. That Tamron could also be the culprit, try an other lens and see if it works better. Last edited by Ex Finn.; 10-15-2013 at 06:38 PM. Reason: Spelling.

10-14-2013, 12:08 PM	#4
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	Originally posted by Julian W I don't recall having to change battery soon afterwards. I jsut take other pictures with no problem. Or turn off autofocus and take this one. My suspicion is that the autofocus is confused (for example, by a long receding central line), but ti doesn't appear to be hunting. Well, my camera has frozen on me due to low voltage, even if the battery isn't run completely dry. Can you consistently reproduce the issue on your end? 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:

10-17-2013, 07:23 AM	#7
Julian W Guest	Nothing in manual about focus confirmation too bad. It sounded good.

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