Author Topic: a65 - Shutter will not release in manual mode autofocus  (Read 4464 times)

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Offline danmworsham

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a65 - Shutter will not release in manual mode autofocus
« on: October 30, 2016, 07:51:43 AM »
I was hoping someone could help me with a problem I'm having with an a65. The camera is new to me and I assume there is a simple solution.

I am trying to shoot night shots of auroras. I have a Tamron 11-18 AF lens on a a65 and when I half depress the shutter release, it autofocuses and the green light appears in the lower left of the screen telling me that it is in focus and ready to shoot. But when I fully depress the shutter release, nothing happens. When I turn the autofocus off, it will release the shutter, but the pictures are out of focus.

The camera is in manual mode, 1600 iso (I have tried this in 800 to 3200 with the same results), shutter speed 6 seconds (again, I have tried it at many other settings with the same results), I think I have tried all of the autofocus modes and focus areas.

I even tried the night mode in the scene mode and it does the same thing. I press the release half way, it autofocuses, the green light comes on, I fully depress the release, and then nothing.

Hopefully someone has a solution. I upgraded from an A3000 mirrorless since the a65 has four more megapixels and a much better lens selection, but if I can't get it to shoot night shots, I 'll keep using the A3000. It takes great night shots and I have a pretty good wide angle set up. It may turn out that the a65 wasn't much of an upgrade after all.

Thank you in advance.

Offline danmworsham

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Re: a65 - Shutter will not release in manual mode autofocus
« Reply #1 on: October 30, 2016, 07:58:34 AM »
I forgot to mention, when I bring the camera indoors in the light, it functions correctly. For some reason, it won't work in the dark. Same settings, just the lighting has changed.

Offline Chris82

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Re: a65 - Shutter will not release in manual mode autofocus
« Reply #2 on: October 30, 2016, 01:00:45 PM »
 The likelihood is that the camera is hunting for focus or has not locked focus in the dark therefore not taking the shot. When shooting at night, the night sky and Aurora it is best to manually focus the lens at infinity and then take your shot. This will ensure everything is as sharp as possible unless you have some close foreground which is usually unlikely at night. AF is generally not good for night photography as the camera can struggle to lock focus.
 

Offline AScot

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Re: a65 - Shutter will not release in manual mode autofocus
« Reply #3 on: October 30, 2016, 07:48:34 PM »
I would like to add the following to Chris82's answers.

Since you are shooting at night and you are getting an indication that the camera has focused, the shutter will release when you fully depress the shutter. It will also release if you do not have focus. Check your exposure time? it is probably at least a couple of seconds or more and you are not giving it time to complete the exposure cycle. This will explain why it is out of focus at night or apparently not working and also why it works in better light conditions when the exposure will be much shorter. When you press the shutter, you will hear one faint click as it opens and one louder click as it closes. With a faster exposure you hear only one click. if you do have a time exposure set, you may not have heard the second click of the shutter as it has not completed the exposure. If you kept any of these photos, you can check the exposure time in the exif data.

You must use a tripod in low light conditions, do not rely on the image stabilization.
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Offline Chris82

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Re: a65 - Shutter will not release in manual mode autofocus
« Reply #4 on: October 30, 2016, 09:22:49 PM »
Another quick addition to the above. Did you have the 2 or 10 second timer on as the camera will wait that long before taking the picture. Just a thought!

Offline danmworsham

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Re: a65 - Shutter will not release in manual mode autofocus
« Reply #5 on: October 30, 2016, 11:37:47 PM »
Chris and AScott,
Thank you for your responses. I will try it on manual focus at infinity and see how it works. We have clear skies today, so we should have some northern lights out tonight.

I just got the camera and don't have a remote (I ordered one the day I received it and realized the remote for my A3000 wasn't compatible), so I am using the 2 second delay since I don't have a remote shutter release. It is on a tripod for long exposure night shooting.

My A3000 autofocuses at night, so I was expecting the A65 to do so as well. Since I can't see anything through the viewfinder in low light, it's kind of hard to manual focus. I guess I'll see if infinity does the trick. Otherwise I'll continue to use the A3000 for night shots. I really want the a65 to work for this, but time will tell.

Thank you.

Offline Chris82

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Re: a65 - Shutter will not release in manual mode autofocus
« Reply #6 on: October 31, 2016, 06:47:22 AM »
Good luck with it danmworsham and feel free to post some of your aurora images. We look forward to seeing them

Offline Faldrax

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Re: a65 - Shutter will not release in manual mode autofocus
« Reply #7 on: October 31, 2016, 01:28:56 PM »
Not sure if you can do this on the A65, but one 'trick' you can try is to first AF with a half shutter press, then switch to MF - the lens should not change focus when you do this, leaving you in MF with focus correct.

You can then shoot in MF (which you believe works OK).
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Offline danmworsham

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Re: a65 - Shutter will not release in manual mode autofocus
« Reply #8 on: November 01, 2016, 06:15:11 PM »
Good luck with it danmworsham and feel free to post some of your aurora images. We look forward to seeing them

How do I upload pictures here? I have lots of good aurora pictures that I've taken with my A3000. Still haven't figured out how to get good night shots with my a65 yet.

Offline AScot

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Re: a65 - Shutter will not release in manual mode autofocus
« Reply #9 on: November 01, 2016, 06:45:05 PM »
Read Here on How do I upload pictures. Any other questions? just ask. Perhaps a member can post a small tutorial on how to get good aurora night shots with the a65, which is the A77,s little brother.
« Last Edit: November 01, 2016, 06:50:12 PM by AScot »
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Offline Gordon McGeachie

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Re: a65 - Shutter will not release in manual mode autofocus
« Reply #10 on: November 01, 2016, 08:59:34 PM »
would it not just be easier to focus manually and use the self timer to release the shutter............
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