Memory card question....

Hi Rich

Possibly, but what memory card are you currently using ?
 
Could be the camera is applying noise reduction.
 
Mardybum said:
While out the other night, I found that my camera spent a lot of time "Busy" after taking long exposures..... Is this down to the memory card? Would investing in a new memory card help?
Click to expand...

No. This is dark frame subtraction. You can disable the function in the camera menu if you want.
 
Take a look at the MB/s speed on the card that should tell you if its fast or not, I personally go for the 90MB/s cards more expensive yes but worth it. Too many look at the card size only and ignore the rest of the information on the card like class size etc
 
Last edited:
This does sound a hell of a lot like long exposures noise reduction, rather than a memory card issue...if you have it on unless you plan on doing zero processing it's best to turn it off, it also has to be off for the likes of star trails :)
 
realspeed said:
Take a look at the MB/s speed on the card that should tell you if its fast or not, I personally go for the 90MB/s cards more expensive yes but worth it. Too many look at the card size only and ignore the rest of the information on the card like class size etc
Click to expand...

Hi real speed,
I can't see anywhere on this card where it mentions mb/s? So basically, the higher the mb/s the quicker the card?
 
MWHCVT said:
This does sound a hell of a lot like long exposures noise reduction, rather than a memory card issue...if you have it on unless you plan on doing zero processing it's best to turn it off, it also has to be off for the likes of star trails :)
Click to expand...

Hi Matt, how's the leg/ankle getting on? Hope your up and about a bit more these days.
So I'm guessing this can be turned off in menu somewhere, I'll have a look now to see if I can see anything.

Thanks pal
 
Mardybum said:
Hi Matt, how's the leg/ankle getting on? Hope your up and about a bit more these days.
So I'm guessing this can be turned off in menu somewhere, I'll have a look now to see if I can see anything.

Thanks pal
Click to expand...

It's on the mend but damn slowly :( hopefully it will be fixed soon, I've got a specialist coming out soon to look at it and make treatment suggestions, and yeah you should be able to turn it off in the menus
 
MWHCVT said:
It's on the mend but damn slowly :( hopefully it will be fixed soon, I've got a specialist coming out soon to look at it and make treatment suggestions, and yeah you should be able to turn it off in the menus
Click to expand...

Good to hear Matt, hopefully the specialist will get you over the last few hurdles.
Just looking in the menu and I can't see anything about noise reduction. Looks like I'll have to get the manual out.....
Thanks
 
Mardybum said:
Good to hear Matt, hopefully the specialist will get you over the last few hurdles.
Just looking in the menu and I can't see anything about noise reduction. Looks like I'll have to get the manual out.....
Thanks
Click to expand...

Hopefully, remind me again what camera is it, maybe I can help
 
Matt posted as I typed

0: Off
1: Auto

For 1 sec. or longer exposures, noise reduction is performed automatically if noise typical of long exposures is detected. This [Auto] setting is effective in most cases.

2: On

Noise reduction is performed for all exposures of 1 sec. or longer. The [On] setting may be effective for noise that cannot be detected or reduced with the [Auto] setting.


  • With setting 1 and 2, after the picture is taken, the noise reduction process may take the same amount of time as the exposure. During the noise reduction, shooting is still possible as long as the maximum burst indicator in the viewfinder shows “1” or higher.

  • At ISO 1600 and higher, noise might be more pronounced with setting 2 than with setting 0 or 1.

  • With setting 2, if a long exposure is shot during Live View display, “BUSY” will be displayed during the noise reduction process and the Live View display will not appear until the noise reduction is completed. (You cannot take another picture.)
Click to expand...
 
Last edited:
Mardybum said:
Excellent, thanks for the help Matt. I'm still going to upgrade my cards too. Do you have a preferred card you use?
Click to expand...

No problem :) as to cards, I've used for a number of years the Sandisk Extreme Pro..they're actually overkill for the majority of what I do but I use them for the odd occasion that I do want to machine gun it

Something like this, which I'm almost tempted to order as I only have 16gb cards right now and I'd quite like a larger card :lol:

http://www.amazon.co.uk/SanDisk-SDS...97846&sr=8-3&keywords=extreme+pro+memory+card
 
MWHCVT said:
No problem :) as to cards, I've used for a number of years the Sandisk Extreme Pro..they're actually overkill for the majority of what I do but I use them for the odd occasion that I do want to machine gun it

Something like this, which I'm almost tempted to order as I only have 16gb cards right now and I'd quite like a larger card :lol:

http://www.amazon.co.uk/SanDisk-SDS...97846&sr=8-3&keywords=extreme+pro+memory+card
Click to expand...

They must be good bits of kit for that price (not to mention the rrp) !!!
I'd prefer to get a couple of 8gb and a 16gb I think, but that's a totally different debate.....
 
Mardybum said:
Hi acetone, I've turned of the noise reduction so I'll see if this helps. After reading what you posted, it definitely sounds like this was the issue.
Not sure what more info I could have provided in my op to be honest.
Thanks for the info.
Click to expand...

I think the only thing you could have added was the type (duration of your exposure) but as it was night it's fair to assume they were of the long variety :thumbs:
 
Mardybum said:
They must be good bits of kit for that price (not to mention the rrp) !!!
I'd prefer to get a couple of 8gb and a 16gb I think, but that's a totally different debate.....
Click to expand...

I'll be honest when I started out I used to buy cheap cards, but every single one of them over the months broke and fell to pieces, hence why I moved to more expensive cards, they have served me well even if they are overkill
 
Mardybum said:
Yeah exposures were anywhere from 20-80 seconds, and then the camera was busy for roughly the same time period after the exposure. All makes perfect sense now that I'm aware of noise reduction option on the menu.

Thanks for all the help guys. This forum is for sure the best source of info/advice/help.
Click to expand...

Glad its sorted, just for your own info, the NR settings effectively take two identical images so as you noticed a 20 s exposure would take 40s to clear. From memory it's all to do with trying to eliminate hot pixels..
 
Mardybum said:
Hey mpe,
Dark frame subtraction? That's waaay above my head by the sound of it. I'll have a look in my settings just now and see what I can see.
Click to expand...

Rich, dark frame subtraction is the technical term for the way most cameras reduce long exposure noise. They (basically) take a 2nd shot of the same duration as the one you chose but with the shutter closed, so the only things that show up on the 2nd shot (aka the dark frame) will be the noise - in theory the same level and place as that on your shot. The camera then subtracts this information from your shot, removing the noise (or most of it!) In your menu, you'll probably find a setting for Long Exposure Noise Reduction or LENR.
 
Nod said:
Rich, dark frame subtraction is the technical term for the way most cameras reduce long exposure noise. They (basically) take a 2nd shot of the same duration as the one you chose but with the shutter closed, so the only things that show up on the 2nd shot (aka the dark frame) will be the noise - in theory the same level and place as that on your shot. The camera then subtracts this information from your shot, removing the noise (or most of it!) In your menu, you'll probably find a setting for Long Exposure Noise Reduction or LENR.
Click to expand...

Hey, thanks for the heads up on that one nod. And for explaining a bit more to me. Appreciate it man.

Rich
 
You must log in or register to reply here.
Back
Top