how do you interrupt/stop a long shutter

Cheers!

Point it at a bright light source? Might as well, you've lost the shot already...

chuckmiller wrote in post #14921914
The title says it. Say you are in the middle of waiting for a 30 second exposure. How can you stop it?

Canon 7D

I'm confused about the basis of this question to begin with... why not just use BULB mode in the first place?

For fireworks, one trick to interrupt the exposure between scenes is to cover the lens with a black cloth. But that only works when there is low ambient light.

xinvisionx wrote in post #14925887
Completed.

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This is so amazing.

on a side note, why is the max exposure (apart from bulb) 30 secs? It's annoying when doing AEB that it can't select a longer shutter speed for itself if it needs to....

jack880 wrote in post #14927626
on a side note, why is the max exposure (apart from bulb) 30 secs? It's annoying when doing AEB that it can't select a longer shutter speed for itself if it needs to....

Just a guess but exposures longer than 30sec probably start to get really hit or miss for AE.

Hang a baseball cap over the lens until it's done...

this thread proves you should always be aware of your camera settings before taking a photo

SoCalTiger wrote in post #14927478
I'm confused about the basis of this question to begin with... why not just use BULB mode in the first place?

For fireworks, one trick to interrupt the exposure between scenes is to cover the lens with a black cloth. But that only works when there is low ambient light.

The OP wants to "abort" the exposure.. not just interrupt it. These suggestions don't shorten the exposure time.

1Tanker wrote in post #14928021
The OP wants to "abort" the exposure.. not just interrupt it. These suggestions don't shorten the exposure time.

I guess part of my confusion is what exactly the OP was asking and why. You're right, if they actually needed to cancel the exposure outright, blocking the lens wouldn't work. I thought they possibly were asking because they wanted a shorter exposure halfway through.

I wasn't clear with the question. Example .. You begin a 30sec exposure, maybe by mistake. You do not want to wait for the 30sec to pass. How do you abort the shot and get the camera ready again without waiting 30sec?

As I posted earlier, during an exposure every button, knob, and dial on my 7D does not respond. Turning off the power or opening the memory card door are the only ways I have found, so far.

chuckmiller wrote in post #14928120
I wasn't clear with the question. Example .. You begin a 30sec exposure, maybe by mistake. You do not want to wait for the 30sec to pass. How do you abort the shot and get the camera ready again without waiting 30sec?

As I posted earlier, during an exposure every button, knob, and dial on my 7D does not respond. Turning off the power or opening the memory card door are the only ways I have found, so far.

Yeah in that case I'd stick with turning the camera on and off. I wouldn't pull a memory card in use because you can corrupt it.

Just opened the door, not touched the card.

You should consult a medical professional with regard to getting treatment for your 'patience' problem

peeaanuut wrote in post #14923346
Power off and on seems to be the only way. I wouldnt open up the door as it can cause write issues that could affect the entire card.

Not any longer. Since the 40D, it has the same effect as power off.