Long Exposure NR and burst fps

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Maguaz

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Paul
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Evening all!

I was playing around with my D80 on burst mode earlier and ran into some problems. I could only get around 1fps against a theoretical maximum of 3fps. I was shooting on manual, at 1/1000s and manual focus.

I finally figured out that Long Exposure Noise Reduction was slowing down the burst as turning it off upped the speed to 3fps BUT...
...according to the manual, Long Exposure NR should only kick in if the shutter speed is 8s or slower.

Can anyone give me a reason as to why Long Exp NR should slow down burst mode, seeing as it shouldn't kick in at 1/1000? :thinking:

Cheers,
Paul.
 
I'd imagine it would kick in a good bit before 8s, but haven't the slightest idea why it would kick in at 1/1000.... :thinking:

Are you shooting in RAW or JPEG? File sizes and write times could make the difference?
 
Thanks for the replies guys, sorry, forgot to say, ISO was at 200 and was shooting exclusively in RAW. As soon as I turned it off the fps jumped from 1 to 3.

I just can't think of any reason why changing just the Long Exp NR should make such a difference....maybe it's "one of those things"? :shrug:
 
Maguaz said:
Evening all!

I was playing around with my D80 on burst mode earlier and ran into some problems. I could only get around 1fps against a theoretical maximum of 3fps. I was shooting on manual, at 1/1000s and manual focus.

I finally figured out that Long Exposure Noise Reduction was slowing down the burst as turning it off upped the speed to 3fps BUT...
...according to the manual, Long Exposure NR should only kick in if the shutter speed is 8s or slower.

Can anyone give me a reason as to why Long Exp NR should slow down burst mode, seeing as it shouldn't kick in at 1/1000? :thinking:

Cheers,
Paul.
Click to expand...

Paul, from my experience when I owned a D80 the shutter speed that triggers the noise reduction is user settable in the menu - don't remember which menu though. For sure it shouldn't trigger at 1/1000 second though.

I had all sorts of problems getting my D80 to fire at 3fps and even when it did it would only do it for a couple of seconds before the buffer got full and slowed it down again.

Shooting in RAW, having d-lighting turned on, using the flash and either high iso nr or long exposure nr will all contribute to slowing the camera down.

HTH :)
 
I might be way off the mark here, as I know b****r all about Nikons, but my cheapie Canon only does about 1fps in RAW, but 3fps in JPEG. Could it just be because you were shooting in RAW?

I try to use RAW wherever possible, but have to resort to JPEG when I'm doing continuous stuff.
 
On my Canon, there's three options on the LX NR... Off, On for greater than 1 second exposures, or On...

I leave mine Off unless I specifically want it on.
 
Hi Bristolian, GrittyShaker and JGS001,

Thanks your suggestions:thumbs:, the strange thing is that I was able to get 3fps (for 15 shots or so, until the buffer filled up) just by turning off Long Exp NR.

I just can't understand why it should cripple the burst speed when it shouldn't be enabled at 1/1000s.:cuckoo: The only setting I can find is on or off?

I think I'm just going to have to file it under "things to remember" :)

Cheers for all the help. :thumbs:
 
Maybe I'm doing something wrong with my own camera, in that case! I'll find out when it comes back from repair. I've been using long exp. NR as well, so maybe that was my problem. I can see your point though; why should a wee exposure like that be classed as a long one?!

Yours, still learning


...
 
Paul,

I really don't know why a 1/1000s exposure would be treated as long exposure. I wonder what the camera thinks is a short one?

Just a thought, have you updated the firmware in the camera?
 
Hi Bristolian,

Yep, firmware is up to date.

My thoughts exactly, I think my camera is living in its own little world...:nuts:
 
That's why I was thinking it was on, not set for greater than a time... long exposure noise reduction, takes a dark frame (an exposure without opening the shutter) then subtracts it from the original image. So there's some processing overhead involved. The dark frame contains things like hot pixels etc, and this is what it's about.
 
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