Press shutter once to take picture, it stays closed, press again and it opens

[bschaefer]

I have a canon 60d. It takes video fine and it takes pictures when in live view. However, when I look through viewfinder and take a picture, the shutter doesn't automatically release. I have to press it a second time to hear the second click. It does still take the picture though so  a bit confused. Help please .

[K3nt]

I have a canon 60d. It takes video fine and it takes pictures when in live view. However, when I look through viewfinder and take a picture, the shutter doesn't automatically release. I have to press it a second time to hear the second click. It does still take the picture though so  a bit confused. Help please .

Sounds like you have 'Mirror Lockup' enabled. Look through the manual and your cameras settings on how to change it.

[infared]

[/quote]

Sounds like you have 'Mirror Lockup' enabled. Look through the manual and your cameras settings on how to change it.
[/quote]

+1

[shutterwideshut]

I have a canon 60d. It takes video fine and it takes pictures when in live view. However, when I look through viewfinder and take a picture, the shutter doesn't automatically release. I have to press it a second time to hear the second click. It does still take the picture though so  a bit confused. Help please .

Sounds like you have 'Mirror Lockup' enabled. Look through the manual and your cameras settings on how to change it.

+1000.  .

[rpt]

Sounds like you have 'Mirror Lockup' enabled. Look through the manual and your cameras settings on how to change it.

+1

+10000
Happened to me last week After a night of shooting star trails and forgetting to reset the lockup

[bschaefer]

Sweet, thanks all. I definitely didn't switch it on purpose. I took a picture of some Thai kids and showed them the result. One got all excited and started pressing buttons. Perhaps that's what happened.

Any who, after reading about it, it actually seems handy.

Do you guys use the mirror lock up feature often?? I enjoy night photography and it seems useful.

[RLPhoto]

Sounds like you have 'Mirror Lockup' enabled. Look through the manual and your cameras settings on how to change it.

+1

+10000
Happened to me last week After a night of shooting star trails and forgetting to reset the lockup

Its over Nine Thousand! 

[James Billett]

I use lockup feature if I know I'm going to be printing big (A3+) from my 5dmkII. Some people argue that vibrations are caused by the mirror flicking up when an exposure is made. Unless you need absolute image quality don't worry.|

Also if you're going to use mirror lockup often make sure your camera is dust free inside as with the mirror lockup you have a greater chance of getting dust on your sensor.

[dstppy]

I had this happen to me the other day after using FoCal.  I couldn't figure it out, so I 'reset all' and restarted . . . then couldn't figure why there were no CR2 . . . that got reset by the reset. D'oh!

[rpt]

Sounds like you have 'Mirror Lockup' enabled. Look through the manual and your cameras settings on how to change it.

+1

+10000
Happened to me last week After a night of shooting star trails and forgetting to reset the lockup

Its over Nine Thousand! 

I was posting and had entered +1000 but before I could post it, shutterwideshut posted his with a +1000! So I was forced to raise the bid!

[sawsedge]

Yes there is absolutely a difference in quality caused by mirror vibrations.  Mirror lockup definitely reduces the vibrations in the camera.

It's easy to test.  Use a sturdy tripod, focus accurately, use a remote release.    Try something at 1/8 and 1/15 sec.  Do this both with and without mirror lockup.  The greater the magnification, the easier it is to see the difference.

[Drizzt321]

Sweet, thanks all. I definitely didn't switch it on purpose. I took a picture of some Thai kids and showed them the result. One got all excited and started pressing buttons. Perhaps that's what happened.

Any who, after reading about it, it actually seems handy.

Do you guys use the mirror lock up feature often?? I enjoy night photography and it seems useful.

For night photography where you are generally using exposures significantly longer than 1/focal length guide, then mirror movement can actually cause a bit of unwanted vibration which can affect the final output, especially if you are going to be doing a large print.

[Mt Spokane Photography]

Generally, I just use liveview.  Its the same as mirror lockup for most applications, and you don't end up wondering what happened.

[Sporgon]

The practical effects of mirror slap are quite shutter speed sensitive, the ones where impact ( pun intended !) are greatest being the 4th to 20th range which is where sawsedge has rightly suggested is best range to test. Once you get longer than about half second any vibration created is unlikely to show in the recorded image.

If you're shooting night shots then you won't see any benefit from locking up the mirror, especially with the small, light mirror in an APS camera. In the days of film I used a Pentax 6x7 - the mirror was massive and boy did that vibrate !! Mirror lock up was mandatory !

[infared]

Sweet, thanks all. I definitely didn't switch it on purpose. I took a picture of some Thai kids and showed them the result. One got all excited and started pressing buttons. Perhaps that's what happened.

Any who, after reading about it, it actually seems handy.

Do you guys use the mirror lock up feature often?? I enjoy night photography and it seems useful.

I agree about Mirror Lock up being useful for slow exposures on a tripod.
Liveview is a good way to go too as it locks up the mirror. Use Liveview  ESPECIALLY  if you are doing multiple exposures for say, HDR. Much faster. The mirror locks up just once and all the exposures are made, and then the mirror goes back down. Very convenient.
Vibrations for the mirror are significant. I was in an abandoned factory a couple of weeks back and was using a carbon fiber tripod, with weigh on it for added stability. I was shooting on a solid concrete floor.  I could actually feel the vibrations from the mirror in the balls of my feet when I was doing my test shots. At first I thought I was mistaken...but I did some more tests and amazingly it was true. To me...that was significant vibrations from that mirror. Amazing.