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Canon 6D slow write speed

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#1 RoyWSpencer

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Posted 11 November 2017 - 04:42 PM

I've been struggling with this for a couple years... sometimes I do time lapse with short exposures, say less than 5 sec, and my Canon 6D can't seem to write a CR2 file to the card in less than about 3 seconds. Every camera processing feature that can be switched off, is. The SD card is plenty fast. Is this an unavoidable feature of the 6D? I found a spec table that suggested it would be able to write a 25mb file in less than a second... but I realize DSLRs also do pre-processing on raw images. I use a cheap interferometer. Any suggestions welcome.



#2 RoyWSpencer

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Posted 11 November 2017 - 04:44 PM

...intervalometer. 



#3 andysea

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Posted 11 November 2017 - 04:53 PM

I think my 6d is a bit faster with a 600x sd card. If I remember well, the 6D also has a ~20 shot image buffer.

#4 RoyWSpencer

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Posted 11 November 2017 - 05:12 PM

Yes, when taking hundreds of shots, the buffer depth doesn't help. And today, card speed isn't a limiting factor.



#5 StuartJPP

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Posted 12 November 2017 - 02:17 AM

If I take flats or bias frames with my 6D I can get about 8 to 10 raw files before the camera needs to catch up. It does take a while to flush them but I would have thought 5 seconds per sub would be slow enough?

 

Have you tried 6 or 7 seconds between subs to see if it can handle that continuously?

 

Are you running the latest firmware? It may help.

 

Other than that, obvious things are to try a different card and make sure it is formatted in camera, preferably before each session.



#6 RoyWSpencer

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Posted 12 November 2017 - 06:58 AM

If I take flats or bias frames with my 6D I can get about 8 to 10 raw files before the camera needs to catch up. It does take a while to flush them but I would have thought 5 seconds per sub would be slow enough?

 

Have you tried 6 or 7 seconds between subs to see if it can handle that continuously?

 

Are you running the latest firmware? It may help.

 

Other than that, obvious things are to try a different card and make sure it is formatted in camera, preferably before each session.

I've tried different cards. What I'm saying is that when taking hundreds of exposures for time lapse photography (which requires even intervals), I have to allow about 3-4 sec for the camera to write a single raw image to the card before I can start the next exposure. I get the impression other cameras accomplish this in about 1 sec. I  have not updated firmware since I bought the camera. I always format the card before each session.



#7 thompeters65

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Posted 12 November 2017 - 04:12 PM

I have a 6D and have updated the firmware. Can’t speak to long exposure shooting before to upgrade but I don’t have that problem shooting darks or flats.

Are you sure you turned off all long exposure noise reduction? There are 3 settings for noise reduction and I shut off all theee.

#8 RoyWSpencer

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Posted 13 November 2017 - 12:19 PM

I have a 6D and have updated the firmware. Can’t speak to long exposure shooting before to upgrade but I don’t have that problem shooting darks or flats.

Are you sure you turned off all long exposure noise reduction? There are 3 settings for noise reduction and I shut off all theee.

I read through the firmware update notes from Canon and none of them address this issue. I believe I have all noise reduction turned off, but I will double-check, thanks.



#9 mvas

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Posted 15 November 2017 - 09:30 PM

 

If I take flats or bias frames with my 6D I can get about 8 to 10 raw files before the camera needs to catch up. It does take a while to flush them but I would have thought 5 seconds per sub would be slow enough?

 

Have you tried 6 or 7 seconds between subs to see if it can handle that continuously?

 

Are you running the latest firmware? It may help.

 

Other than that, obvious things are to try a different card and make sure it is formatted in camera, preferably before each session.

I've tried different cards. What I'm saying is that when taking hundreds of exposures for time lapse photography (which requires even intervals), I have to allow about 3-4 sec for the camera to write a single raw image to the card before I can start the next exposure. I get the impression other cameras accomplish this in about 1 sec. I  have not updated firmware since I bought the camera. I always format the card before each session.

 

Tell us exactly which Memory Card you are using.

Saying, that you have tried different memory cards, tells us nothing.
Remove the memory card from the camera and and reply with exact details.

 

This is one of the fastest memory cards for the Canon 6D ...

 

SanDisk Extreme Pro 95MB/s 64GB SDXC UHS-I U3 Memory Card

 

https://www.camerame...xc-memory-card/

 

Faster cards do not speed up the 6D's "Write Speed".

Note that it states "95 MB/s" & "U(3)" on the label.

It should sustain 1 frame per second until filled.

 

The slowest Memory Card cannot sustain 1 Frame every 2 seconds.

 

Make sure LENR is OFF = faster

 

JPEG file takes some processing time, but the smaller JPEG file writes way faster than RAW file.


Edited by mvas, 15 November 2017 - 10:24 PM.


#10 RoyWSpencer

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Posted 16 November 2017 - 08:35 AM

 

 

If I take flats or bias frames with my 6D I can get about 8 to 10 raw files before the camera needs to catch up. It does take a while to flush them but I would have thought 5 seconds per sub would be slow enough?

 

Have you tried 6 or 7 seconds between subs to see if it can handle that continuously?

 

Are you running the latest firmware? It may help.

 

Other than that, obvious things are to try a different card and make sure it is formatted in camera, preferably before each session.

I've tried different cards. What I'm saying is that when taking hundreds of exposures for time lapse photography (which requires even intervals), I have to allow about 3-4 sec for the camera to write a single raw image to the card before I can start the next exposure. I get the impression other cameras accomplish this in about 1 sec. I  have not updated firmware since I bought the camera. I always format the card before each session.

 

Tell us exactly which Memory Card you are using.

Saying, that you have tried different memory cards, tells us nothing.
Remove the memory card from the camera and and reply with exact details.

 

This is one of the fastest memory cards for the Canon 6D ...

 

SanDisk Extreme Pro 95MB/s 64GB SDXC UHS-I U3 Memory Card

 

https://www.camerame...xc-memory-card/

 

Faster cards do not speed up the 6D's "Write Speed".

Note that it states "95 MB/s" & "U(3)" on the label.

It should sustain 1 frame per second until filled.

 

The slowest Memory Card cannot sustain 1 Frame every 2 seconds.

 

Make sure LENR is OFF = faster

 

JPEG file takes some processing time, but the smaller JPEG file writes way faster than RAW file.

 

I'm using a SanDisk Extreme Pro 32 GB. As I alluded to above, I realize the card is not the limiting factor, it is plenty fast enough...it's the camera write speed.

 

Maybe a better way to have asked my question is this: Has ANYONE with a Canon 6D been able to get the camera to write a full-res raw file to the card in 1 second or less?



#11 mvas

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Posted 16 November 2017 - 04:35 PM

I'm using a SanDisk Extreme Pro 32 GB. As I alluded to above, I realize the card is not the limiting factor, it is plenty fast enough...it's the camera write speed.

 

Maybe a better way to have asked my question is this: Has ANYONE with a Canon 6D been able to get the camera to write a full-res raw file to the card in 1 second or less?

 

Yes, as I previously stated in message #9 ...

The Canon 6D can sustain 1 RAW frame per second until the Memory Card is full.

Technically, the Canon 6D can almost shoot 3 RAW images in just 2 seconds non-stop = 1.4 fps

 

I just did a test ...

Using a freshly formatted UHS-1 90MB/s U3 16GB Memory Card in the Canon 6D, saving RAW only file format 

I set the Intervalometer for 100 exposures, with a 1 second interval

It took exactly 100 seconds to obtain the 100 exposures.

The Red LED indicating "Writing Image to Memory Card" turned OFF within 1 second after the last photo = No Buffering was required.

I never saw "BUSY".

 

The Canon 6D can write to the memory card at 36 Megabytes per second.

My files were 20.3 MB each - taking less than 1 second to save to memory card.

My camera is typical, sustained imaging at 1.4 fps.

 

Why does your camera take 3 seconds per image?

Are you saying that your RED LED stays ON for 3 more seconds ( "Writing to Memory Card" ) after the shutter closes?

If true, then that is waaaay too long.


Edited by mvas, 16 November 2017 - 04:36 PM.


#12 RoyWSpencer

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Posted 16 November 2017 - 05:33 PM

 

I'm using a SanDisk Extreme Pro 32 GB. As I alluded to above, I realize the card is not the limiting factor, it is plenty fast enough...it's the camera write speed.

 

Maybe a better way to have asked my question is this: Has ANYONE with a Canon 6D been able to get the camera to write a full-res raw file to the card in 1 second or less?

 

Yes, as I previously stated in message #9 ...

The Canon 6D can sustain 1 RAW frame per second until the Memory Card is full.

Technically, the Canon 6D can almost shoot 3 RAW images in just 2 seconds non-stop = 1.4 fps

 

I just did a test ...

Using a freshly formatted UHS-1 90MB/s U3 16GB Memory Card in the Canon 6D, saving RAW only file format 

I set the Intervalometer for 100 exposures, with a 1 second interval

It took exactly 100 seconds to obtain the 100 exposures.

The Red LED indicating "Writing Image to Memory Card" turned OFF within 1 second after the last photo = No Buffering was required.

I never saw "BUSY".

 

The Canon 6D can write to the memory card at 36 Megabytes per second.

My files were 20.3 MB each - taking less than 1 second to save to memory card.

My camera is typical, sustained imaging at 1.4 fps.

 

Why does your camera take 3 seconds per image?

Are you saying that your RED LED stays ON for 3 more seconds ( "Writing to Memory Card" ) after the shutter closes?

If true, then that is waaaay too long.

 

THANK YOU...you are the first person in 3 years to give me hard data on this from their camera.

 

I just tried the same thing you did, taking 1/1000 sec exposures, triggered every second. The light never goes out, the buffer fills after maybe 35 photos, and then the camera starts skipping exposures.

 

So, I changed the intervalometer to 2 sec intervals.  The light stays on continuously for about 25 shots, then the camera light goes out maybe 1/10 sec before the camera is triggered again. It took 100 successful shots in 200 sec in this mode. So, I assume it's taking just under 2 sec to write the file.

 

My file sizes are the same as yours. So something is wrong. I've gone through every setting under Menu, and everything is off. 

 

Maybe I will download the latest firmware, it's never been updated, and the camera is over 3 years old.  The description of the firmware updates at the Canon website mentions nothing about this, but who knows?

 

Again, THANK YOU for doing the test. It sounds like your camera is at least twice as fast as mine at dumping the buffer. I'm using a SanDisk Ultra Plus 80 MB/s, and I'm assuming that's not the limiting factor.



#13 mvas

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Posted 16 November 2017 - 09:09 PM

I agree, the SanDisk 80 MB/s is fast BUT that is the Read Speed, not the Write Speed ( a little slower but should be OK )

 

My Firmware = 1.1.6 & Lens = 1.0.3
All firmware should write at 36 Megabytes per second.
The Canon 6D can shoot at 4.5 fps only until the Internal Fast Buffer is Full
Once the Internal Fast Buffer is Full, then the slower 36 MB/s UHS-1 bus speed limits max frame rate down to 1.4 fps.

You camera is down to 0.5 fps - WHY???

Have you sent email Canon? ( bad SD port ? )

 

Try this forum ...

https://www.dpreview.com/forums/1032

 

OK Let's try this ... take just one photo.

How long does the Red LED stay ON, after the shutter closes?

The Red LED should stay ON for less than 1 second, after the shutter closes

Does the Red LED stay ON for an extra 2 to 3 seconds, after the shutter closes?

 

Did you select Manual Focus?

 

My settings ...

 

Menu Camera #1

=============

Image Quality = [RAW] 20MP 5,472 x 3,648 JPEG = [-] ( = none )

Beep = Enable

Release Shutter w/o Card = OFF

Image Review = OFF

 

Menu Camera #2

=============

Lens Aberration = EF50mm F/1.8 STM

........ Peripheral Aberration = Enable

........ Chromatic Aberration = Enable

External Speed light = (defaults)

Mirror Lockup = OFF

 

Menu Camera #3 (all defaults?)

==============

Exp Comp = 0

ISO = 100

ALO = Standard

WB = [AWB]

CWB = none

WB/Shift = 0,0+/-0

Color Space = sRGB

 

Menu Camera #4

=============

Picture Style = Auto

LENR = OFF

High ISO NR = Standard

Highlight Tone = OFF

Dust Delete = n/a

Mult Epx = Disable

 

Menu Live View #1
==============

Live Shoot = Enable

AF Method = Live

Grid Display = Off

Aspect Ratio = 3;2

Expo Sim = Enable

 

Menu Live View #2
===============

Silent LV Shoot = Disable

Meter timer = 4 sec

 

Drive = Singe Shot

WiFi = Off

Wired Remote Control

GPS = Off

 

What else?

 

Have you tried ...

a) High Level Formatting the SD Card?

b) Low Level Formatting the SD Card?

( both deletes all photos ! )


Edited by mvas, 16 November 2017 - 09:12 PM.


#14 RoyWSpencer

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Posted 17 November 2017 - 07:58 AM

I agree, the SanDisk 80 MB/s is fast BUT that is the Read Speed, not the Write Speed ( a little slower but should be OK )

 

My Firmware = 1.1.6 & Lens = 1.0.3
All firmware should write at 36 Megabytes per second.
The Canon 6D can shoot at 4.5 fps only until the Internal Fast Buffer is Full
Once the Internal Fast Buffer is Full, then the slower 36 MB/s UHS-1 bus speed limits max frame rate down to 1.4 fps.

You camera is down to 0.5 fps - WHY???

Have you sent email Canon? ( bad SD port ? )

 

Try this forum ...

https://www.dpreview.com/forums/1032

 

OK Let's try this ... take just one photo.

How long does the Red LED stay ON, after the shutter closes?

The Red LED should stay ON for less than 1 second, after the shutter closes

Does the Red LED stay ON for an extra 2 to 3 seconds, after the shutter closes?

 

Did you select Manual Focus?

 

My settings ...

 

Menu Camera #1

=============

Image Quality = [RAW] 20MP 5,472 x 3,648 JPEG = [-] ( = none )

Beep = Enable

Release Shutter w/o Card = OFF

Image Review = OFF

 

Menu Camera #2

=============

Lens Aberration = EF50mm F/1.8 STM

........ Peripheral Aberration = Enable

........ Chromatic Aberration = Enable

External Speed light = (defaults)

Mirror Lockup = OFF

 

Menu Camera #3 (all defaults?)

==============

Exp Comp = 0

ISO = 100

ALO = Standard

WB = [AWB]

CWB = none

WB/Shift = 0,0+/-0

Color Space = sRGB

 

Menu Camera #4

=============

Picture Style = Auto

LENR = OFF

High ISO NR = Standard

Highlight Tone = OFF

Dust Delete = n/a

Mult Epx = Disable

 

Menu Live View #1
==============

Live Shoot = Enable

AF Method = Live

Grid Display = Off

Aspect Ratio = 3;2

Expo Sim = Enable

 

Menu Live View #2
===============

Silent LV Shoot = Disable

Meter timer = 4 sec

 

Drive = Singe Shot

WiFi = Off

Wired Remote Control

GPS = Off

 

What else?

 

Have you tried ...

a) High Level Formatting the SD Card?

b) Low Level Formatting the SD Card?

( both deletes all photos ! )

If I take one photo (1/1000 sec exp), it definitely takes more than 1 sec for the light to go out. As I mentioned, I get a better idea of how fast it's writing by using the intervalometer...if I set it to trigger every 2 sec, then the light is just starting to go out before a new frame is triggered...so, I assume that mean it takes about 1.8-1.9 sec to process and write 1 Raw file to the card. Slow compared to yours.

 

I went through the menus, and my setting are about the same as yours...I have a couple of things turned off that you have on, like lens correction.

 

I'm using manual focus.

 

I always do a low-level format of the card before shooting.

 

I just updated the firmware from 1.1.3 to 1.1.7. No improvement.

 

Maybe I'll e-mail Canon.

 

Thanks for the help.



#15 mvas

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Posted 17 November 2017 - 09:52 AM

With the "Single Shot" test that eliminates any possibility it was an intervalometer issue.

 

A single shot takes 2 Seconds to SAVE the RAW image file to the SD Memory Card - arrrg.

Did your camera ever shoot 100 Images at 1 FPS continuously?

Or has it been slooow since day #1?

  • You are not using a Micro-SD Card inside a Micro-to-SD Adapter - right? ( can be slow )
  • The CPU in your camera is "busy" doing some unknown processing?
  • Perform a "Reset All Camera Settings back to defaults" ? ( Some obscure setting )
  • Try a different fully charged battery pack?
  • "Fake / Re-labeled" SD cards?
  • Finally ... A defective SD port in the camera?

 

My friend said, "Test this memory card in your 6D" ...

ProMaster UHS-1 V30 U3 16GB SDHC Memory Card

Perfect results: 100 RAW shots in 100 seconds + 1 second for Red LED to turn off


Edited by mvas, 17 November 2017 - 09:57 AM.


#16 RoyWSpencer

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Posted 17 November 2017 - 10:02 AM

With the "Single Shot" test that eliminates any possibility it was an intervalometer issue.

 

A single shot takes 2 Seconds to SAVE the RAW image file to the SD Memory Card - arrrg.

Did your camera ever shoot 100 Images at 1 FPS continuously?

Or has it been slooow since day #1?

  • You are not using a Micro-SD Card inside a Micro-to-SD Adapter - right? ( can be slow )
  • The CPU in your camera is "busy" doing some unknown processing?
  • Perform a "Reset All Camera Settings" back to defaults? ( Some obscure setting )
  • Try a different fully charged battery pack?
  • "Fake / Re-labeled" SD cards?
  • Finally ... A defective SD port in the camera?

 

My friend said, "Test this memory card in your 6D" ...

ProMaster UHS-1 V30 U3 16GB SDHC Memory Card

Perfect results: 100 shots in 100 seconds + 1 second for Red LED to turn off

I can get it to write 1 fps if I only shoot smaller raw files or small JPEGs. 

 

It has been slow since new.

 

I am not using a micro SD card

 

It is possible the in-camera processing is what is slowing it down...who knows?

 

I've used multiple batteries that I swap between.

 

I've boght several SD cards over the years as faster ones come out. Always the same problem, but I can't say that it wasn't a little slower 3 years ago with the sloer SD cards.

 

I don't know about SD port issues...but it seems unlikely that a port problem would only show up as slower write speeds.

 

I might try the factory reset suggestion when I get home from work.

 

Thanks again for helping. This wouldn't be a practical issue except I sometimes do time lapse of clouds using raw files, and 3 seconds between frames continuously isn't quite fast enough in some cases.



#17 RoyWSpencer

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Posted 17 November 2017 - 10:20 AM

I'm ordering the San Disk Extreme Pro 95MB/sec card, which has tested to be the fastest with the 6D. Probably won't help, but I need a 64 GB card anyway.



#18 calypsob

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Posted 17 November 2017 - 02:00 PM

I'm ordering the San Disk Extreme Pro 95MB/sec card, which has tested to be the fastest with the 6D. Probably won't help, but I need a 64 GB card anyway.

The card write speed is not going to be a limiting factor on stills as much as it is with video if you are using at least a class 10 hc1 card.  Typically as you mentioned earlier, you can add a delay between exposures to prevent frame skipping during a timelapse and avoid flooding the buffer. Once the buffer is full there is not much that you can do to speed up the write process.  Any HC1 card should do fine with stills, I am not sure where the compatibility limit is now with the older 6d as alot of newer cards have hit the market since this card came out several years ago.  I use an extreme pro as well, san disk has some pretty reliable cards.  If you do not need to rely on the full depth of raw stills, another option would be to run magic lantern with FPS override.  This would allow you to shoot low FPS video and fully utilize the write speed of your card.  For a 5fps or faster timelapse, I would go that route and dial in exposure settings.  All of this assuming that you are comfortable working with magic lantern.  



#19 RoyWSpencer

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Posted 17 November 2017 - 02:11 PM

 

I'm ordering the San Disk Extreme Pro 95MB/sec card, which has tested to be the fastest with the 6D. Probably won't help, but I need a 64 GB card anyway.

The card write speed is not going to be a limiting factor on stills as much as it is with video if you are using at least a class 10 hc1 card.  Typically as you mentioned earlier, you can add a delay between exposures to prevent frame skipping during a timelapse and avoid flooding the buffer. Once the buffer is full there is not much that you can do to speed up the write process.  Any HC1 card should do fine with stills, I am not sure where the compatibility limit is now with the older 6d as alot of newer cards have hit the market since this card came out several years ago.  I use an extreme pro as well, san disk has some pretty reliable cards.  If you do not need to rely on the full depth of raw stills, another option would be to run magic lantern with FPS override.  This would allow you to shoot low FPS video and fully utilize the write speed of your card.  For a 5fps or faster timelapse, I would go that route and dial in exposure settings.  All of this assuming that you are comfortable working with magic lantern.  

 

I've never used Magic Lantern.  Not really interested in spending any more time than necessary to get good results, so I would consider myself an "efficient" astrophotographer...get 90% of the results without spending twice as much time to get another 5%. :-)  I've sent an email to Canon support to see if they have any ideas.  It's not a huge issue...just an annoying one.  For example, I'd like night sky time lapses to have as little gap as possible when satellites go over.



#20 calypsob

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Posted 17 November 2017 - 02:21 PM

 

 

I'm ordering the San Disk Extreme Pro 95MB/sec card, which has tested to be the fastest with the 6D. Probably won't help, but I need a 64 GB card anyway.

The card write speed is not going to be a limiting factor on stills as much as it is with video if you are using at least a class 10 hc1 card.  Typically as you mentioned earlier, you can add a delay between exposures to prevent frame skipping during a timelapse and avoid flooding the buffer. Once the buffer is full there is not much that you can do to speed up the write process.  Any HC1 card should do fine with stills, I am not sure where the compatibility limit is now with the older 6d as alot of newer cards have hit the market since this card came out several years ago.  I use an extreme pro as well, san disk has some pretty reliable cards.  If you do not need to rely on the full depth of raw stills, another option would be to run magic lantern with FPS override.  This would allow you to shoot low FPS video and fully utilize the write speed of your card.  For a 5fps or faster timelapse, I would go that route and dial in exposure settings.  All of this assuming that you are comfortable working with magic lantern.  

 

I've never used Magic Lantern.  Not really interested in spending any more time than necessary to get good results, so I would consider myself an "efficient" astrophotographer...get 90% of the results without spending twice as much time to get another 5%. :-)  I've sent an email to Canon support to see if they have any ideas.  It's not a huge issue...just an annoying one.  For example, I'd like night sky time lapses to have as little gap as possible when satellites go over.

 

I see what you mean.  Well in time if you go that route I think it would be a definite answer, especially for satellites.  There is a learning curve to ML but once you have it down, its pretty quick and it allows me to cut a laptop out of 90% of my typical workflow, which may be appealing to you.  For now keep us posted, I look forwards to seeing your results. 



#21 RoyWSpencer

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Posted 17 November 2017 - 02:26 PM

 

 

 

I'm ordering the San Disk Extreme Pro 95MB/sec card, which has tested to be the fastest with the 6D. Probably won't help, but I need a 64 GB card anyway.

The card write speed is not going to be a limiting factor on stills as much as it is with video if you are using at least a class 10 hc1 card.  Typically as you mentioned earlier, you can add a delay between exposures to prevent frame skipping during a timelapse and avoid flooding the buffer. Once the buffer is full there is not much that you can do to speed up the write process.  Any HC1 card should do fine with stills, I am not sure where the compatibility limit is now with the older 6d as alot of newer cards have hit the market since this card came out several years ago.  I use an extreme pro as well, san disk has some pretty reliable cards.  If you do not need to rely on the full depth of raw stills, another option would be to run magic lantern with FPS override.  This would allow you to shoot low FPS video and fully utilize the write speed of your card.  For a 5fps or faster timelapse, I would go that route and dial in exposure settings.  All of this assuming that you are comfortable working with magic lantern.  

 

I've never used Magic Lantern.  Not really interested in spending any more time than necessary to get good results, so I would consider myself an "efficient" astrophotographer...get 90% of the results without spending twice as much time to get another 5%. :-)  I've sent an email to Canon support to see if they have any ideas.  It's not a huge issue...just an annoying one.  For example, I'd like night sky time lapses to have as little gap as possible when satellites go over.

 

I see what you mean.  Well in time if you go that route I think it would be a definite answer, especially for satellites.  There is a learning curve to ML but once you have it down, its pretty quick and it allows me to cut a laptop out of 90% of my typical workflow, which may be appealing to you.  For now keep us posted, I look forwards to seeing your results. 

 

what would REALLY make the effort more enjoyable is an articulating LCD display on the camera. The 6D MkII has it, but I'm not ready to spend another $2,000 just for that feature. I'll just crane my neck and lie on the ground for now.



#22 mvas

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Posted 17 November 2017 - 02:29 PM

 

I'm ordering the San Disk Extreme Pro 95MB/sec card, which has tested to be the fastest with the 6D. Probably won't help, but I need a 64 GB card anyway.

The card write speed is not going to be a limiting factor on stills as much as it is with video if you are using at least a class 10 hc1 card.  Typically as you mentioned earlier, you can add a delay between exposures to prevent frame skipping during a timelapse and avoid flooding the buffer. Once the buffer is full there is not much that you can do to speed up the write process.  Any HC1 card should do fine with stills, I am not sure where the compatibility limit is now with the older 6d as alot of newer cards have hit the market since this card came out several years ago.  I use an extreme pro as well, san disk has some pretty reliable cards.  If you do not need to rely on the full depth of raw stills, another option would be to run magic lantern with FPS override.  This would allow you to shoot low FPS video and fully utilize the write speed of your card.  For a 5fps or faster timelapse, I would go that route and dial in exposure settings.  All of this assuming that you are comfortable working with magic lantern.  

 

The problem is his SD port writes RAW Image files at only 15 MB per second.

It should be writing at over 30 MB per second, up to 36 MB per second.

If a complete reset to defaults and reboot does not fix this problem then

he needs to contact Canon for "SD Port Repair".

 

There is no reason that a Canon 6D with an 80MB/s SD Memory Card ( which he has ) can't image at 1 RAW fps continuously - unless it is broken.


Edited by mvas, 17 November 2017 - 02:37 PM.


#23 mvas

mvas

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Posted 17 November 2017 - 02:34 PM

what would REALLY make the effort more enjoyable is an articulating LCD display on the camera. The 6D MkII has it, but I'm not ready to spend another $2,000 just for that feature. I'll just crane my neck and lie on the ground for now.

 

Field Monitor, something like this ...

 

https://www.adorama....AiABEgI6FvD_BwE



#24 RoyWSpencer

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Posted 17 November 2017 - 02:48 PM

 

what would REALLY make the effort more enjoyable is an articulating LCD display on the camera. The 6D MkII has it, but I'm not ready to spend another $2,000 just for that feature. I'll just crane my neck and lie on the ground for now.

 

Field Monitor, something like this ...

 

https://www.adorama....AiABEgI6FvD_BwE

 

Cool! Never seen that before.



#25 mvas

mvas

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Posted 17 November 2017 - 03:30 PM

Cool! Never seen that before.

Did you purchase your High Speed SD Cards online or at local store?
Is it possible they are fake / re-labelled [slow] SD cards?
That would explain everything.




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