Showing results for 
Show  only  | Search instead for 
Did you mean: 

6D Mark II - intervalometer and Long Exposure Noise Reduction


I just picked up a 6D2 after having a 6D for 5 years.  I do a lot of Astrophotography with my 6D and hoping for same with Mark II.


I was excited about the built-in intervalometer, but am disappointed that you cannot use it with mirror lock, long exposure noise reduction (LENR) buffering nor programmed bulb exposure.


1)  on my 6D with Magiclantern, its intervalometer works great with mitt or lockup and shutter delay of 2S.  At each intervalometer tick, the mirror locks, the 2 sec delay counts, then my long exposure starts.  6D2 does not support this.  😞


With an an external intervalometer, if you turn on LENR, the first image fires, then as it starts if LENR, if another image is started, the LENR is suspended and next image starts. After 3 images, LENR runs a full dark exposure and is automatically subtracted from the previous 3 exposures which were buffered... then all 3 saved.  Then 3 more exposures and a single dark. Etc.  with Mark II intervalometer, thevLENR is not interrupted, so a full LENR Is generated after every image and applied.


too bad.  It certainly can be done but canon won”t do it.


jim in Boulder 



I would think that it is probably better to periodically capture a “dark frame”, and then do the noise reduction in post.

"The right mouse button is your friend."

Thanks for your note. The traditional way is to capture a series of darks at the end of the session, average and apply to all images in post. Being able to have a dark automatically captured and applied to a 3-buffer series is mathematically the same, adds relatively small amount to capture time, and at the end of your shoot it’s DONE! Sweeet! I’ve done this with external intervalometer. Just too bad the internal one behaves differently. Thanks
03/14/2023: New firmware version 1.8.1 is available for EOS R6

03/02/2023: New Firmware Updates Are Available:

EOS R7 - Version 1.3.0EOS R10 - Version 1.3.0
02/24/2023: We've updated Share Your Photos

2/07/2023: New product announcements!

EOS R8 EOS R50RF-S55-210mm F5-7.1 IS STMRF24-50mm F4.5-6.3 IS STMRF15-30mm F4.5-6.3 IS STM
01/18/2023: New firmware version 1.1.1 is available for EOS R6 Mark II
01/09/2023: Help ensure your autofocus is properly aligned with a Canon Precision Alignment
01/03/2023: Welcome to CES 2023!
12/08/2022: New firmware version is available for EOS C70
12/07/2022: New firmware version 1.7.0 is available for EOS R5
11/22/2022: New firmware available for EOS R3, EOS R7 and EOS R10
11/16/2022: We're thrilled to be ranked among the Best Employers for Veterans in 2022 by Forbes.
08/31/2022: New firmware version 1.1.1 is available for RF 70-200mm L IS USM
08/09/2022: New firmware version 1.2.0 is available for CR-N 300
08/09/2022: New firmware version 1.2.0 is available for CR-N 500
07/14/2022: New firmware version 1.0.1 is available for CR-X300
06/10/2022: Service Notice:UPDATE: Canon Inkjet Printer continuous reboot loop or powering down
06/07/2022: New firmware version 1.3.2 is available for PowerShot G7 X Mark III
05/31/2022: Did someone SAY Badges?
05/26/2022: New firmware version is available for EOS-C500 Mark II
05/26/2022: New firmware version is available for EOS-C300 Mark III
05/10/2022: Keep your Canon gear in optimal condition with a Canon Maintenance Service
05/05/2022: We are excited to announce that we have refreshed the ranking scale within the community!
04/26/2022: New firmware version is available for EOS R5 C
03/23/2022: New firmware version is available for EOS-C70
02/09/2022: Share Your Photos is back!
02/07/2022: New firmware version 1.6.1 is available for EOS-1DX Mark III
01/13/2022: Community Update. We will be retiring the legacy profile avatars on 01/20/2022. Click this link to read more.