topic Re: EOS T5 shutter randomly misfires in EOS DSLR & Mirrorless Cameras

EOS T5 shutter randomly misfires

Blaine — Wed, 29 Apr 2026 05:03:08 GMT

I have a EOS T5 that I am using for macrophotography. I use a Wemacro focusing rail and the Canon utility program and am shooting a series of images for focus stacking.

When shooting my camera randomly fails to fire. This can be one missed frame or several (5 to 6 in a row). My cables seem to be OK and I have changed settings to allow time for image download, but nothing seems to resolve the issue. Others have had this problem, but I have not yet seen a solution.

Any suggestions?

Re: EOS T5 shutter randomly misfires

batayes704 — Wed, 29 Apr 2026 06:59:54 GMT

Hello! openskycc login

Your EOS T5 misfires during focus stacking are likely due to timing and communication issues between the camera, rail, and EOS Utility. The most reliable fix is to save images directly to the SD card instead of auto‑downloading, add longer delays between shots, use a fast card, and trigger the shutter through the Wemacro rail rather than USB. Also ensure stable power with a full battery or AC adapter. This setup usually prevents missed frames.

Re: EOS T5 shutter randomly misfires

Blaine — Wed, 29 Apr 2026 07:14:10 GMT

Thanks, I will try the SD card. I do have a power supply and use Wemacro for triggering.

Re: EOS T5 shutter randomly misfires

Waddizzle — Wed, 29 Apr 2026 22:18:39 GMT

“ When shooting my camera randomly fails to fire. This can be one missed frame or several (5 to 6 in a row). My cables seem to be OK and I have changed settings to allow time for image download, but nothing seems to resolve the issue. Others have had this problem, but I have not yet seen a solution. “

it sounds to me that your interval between shots could be too short, too. You must allow for the time it takes to capture and save the image. Noise reduction settings can significantly increase the amount of time to save an image.

Re: EOS T5 shutter randomly misfires

FloridaDrafter — Thu, 30 Apr 2026 03:59:10 GMT

@Blaine wrote:

"I have a EOS T5 that I am using for macrophotography. I use a Wemacro focusing rail and the Canon utility program"

What role does the Canon Utility play?

I used the Wemacro rail with several rebels, but always used the program that came with the rail to set my parameters and store to the card. I eventually moved to Helicon and although it would control the rail, I got the same results without it.

Just curious.

Newton

Re: EOS T5 shutter randomly misfires

Blaine — Fri, 01 May 2026 06:16:11 GMT

I have occasionally (accidentally) set the program to 1 second between shots and it ran beautifully with about the same number of missed shots. So far I cannot see any difference between long and short delays between images.

Re: EOS T5 shutter randomly misfires

Blaine — Fri, 01 May 2026 08:04:38 GMT

OK, HOW? I searched for a way to save to the card instead of a DL, but don't seem to see any setting to avoid the DL.

Re: EOS T5 shutter randomly misfires

Waddizzle — Fri, 01 May 2026 17:01:46 GMT

“ I have occasionally (accidentally) set the program to 1 second between shots and it ran beautifully with about the same number of missed shots. So far I cannot see any difference between long and short delays between images. “

What exactly does that mean? How long is long? How short is short?

In order to best advise you with specific solutions, we will need more detailed information about how you are using the camera.

You have stated that you are using a 30 sec long exposure with a 31 second interval.

What Noise Reduction settings are enabled, if any?
What Image Correction settings are enabled, if any?
Have you tried disconnecting the rails and the remote connectivity and simply took a 30 second exposure, yet? How long does red LED stay lit?

if you are experiencing issues with this Wemacro app , then you should consult with them.

Re: EOS T5 shutter randomly misfires

Waddizzle — Sat, 02 May 2026 02:03:28 GMT

What happens when you set the interval for 70 seconds?

Re: EOS T5 shutter randomly misfires

Blaine — Sat, 02 May 2026 02:16:31 GMT

I have only set it as far as 6 to 8 seconds with no clear improvement. I have never had trouble with astronomical imaging which is up to 10 minutes of exposure (but not with wemacro). This does seem to be some sort of timing issue, but the solution is not yet obvious.

I am not using any noise reduction or image correction.

Again, when I have accidentally used 1 second delays I get the same issue or an improvement with no apparent down-load issues..

Re: EOS T5 shutter randomly misfires

Blaine — Sat, 02 May 2026 02:20:52 GMT

How did you store to the card? When I tried to set my folders or setting to save to an SD card I don't see any option for that, only to DL all images or to DL + save to card.

Re: EOS T5 shutter randomly misfires

Waddizzle — Sat, 02 May 2026 09:06:20 GMT

“ How did you store to the card? When I tried to set my folders or setting to save to an SD card I don't see any option for that, only to DL all images or to DL + save to card. “

How? Basic troubleshooting.

Disconnect everything and test the camera by itself. No accessories. No remote control. Let it capture a 30 second exposure and observe what happens for the next minute.

—————————-

“ This does seem to be some sort of timing issue, but the solution is not yet obvious. “

Obviously , there is. You need to perform basic troubleshooting. Is there a problem with the camera, your settings, or Wemacro?

Until you seperate them out, you will never figure it out.

Re: EOS T5 shutter randomly misfires

Blaine — Tue, 05 May 2026 06:30:01 GMT

I believe that the problem is with the EOS Utility 2 program. I frequently find that the shutter does not respond to triggering from a mouse click to the utility program button and is also not responding to triggering from the eternal program. I get the same responses from my external program with shutter delays from 1 to 6 seconds but regular random failures with a manual press.

The version I have for the T5 is version 2.14.20.0. Is there a more recent version and where would I DL it?

Re: EOS T5 shutter randomly misfires

Waddizzle — Tue, 05 May 2026 16:27:23 GMT

“ I believe that the problem is with the EOS Utility 2 program. I frequently find that the shutter does not respond to triggering from a mouse click to the utility program button and is also not responding to triggering from the eternal program. I get the same responses from my external program with shutter delays from 1 to 6 seconds but regular random failures with a manual press.

The version I have for the T5 is version 2.14.20.0. Is there a more recent version and where would I DL it? “

“ What role is EOS Utility playing? “

You have the latest version of EOSU 2. The product support page for the T5 is linked below.

https://www.usa.canon.com/support/p/eos-rebel-t5

Re: EOS T5 shutter randomly misfires

FloridaDrafter — Tue, 05 May 2026 18:49:14 GMT

@Blaine wrote:

How did you store to the card? When I tried to set my folders or setting to save to an SD card I don't see any option for that, only to DL all images or to DL + save to card.

To start with, I didn't use EOSU and just used the utility that came with my Wemacro rail. It automatically stores your stack on camera. Don't bother looking in the Wemacro utility, it just does it by default.

As for EOSU, version 2 and 3 both allow you to set d/l and folder options. If it's not showing, it could be because you have the macro rail in the mix.

Newton