Lapland in December advice

[Jonathan Teatime]

... Some cameras have a noise setting for long exposures too, but not been there so cannot comment.

My understanding of the long exposure noise reduction setting is that it takes the camera approximately the same time as the exposure to process and save the image, a 20 minute exposure will take the camera a further 20 minute or so to process and save the image, so use with caution.

[Swanny48]

A head torch is a good idea even if only to see where you’re going. Turn it off while taking your shot and if there are other with you, don’t spoil their shots either. As I said earlier, familiarise yourself with your camera and lens and practice using them in darkness. It’s worth focussing on something very distant, so you can see where the focussing mark is, as it probably won’t be exactly on the infinity mark. Then you know where to set the focus ring in darkness. There is no need to bother with long exposure noise reduction.

John

[antoeknee]

My understanding of the long exposure noise reduction setting is that it takes the camera approximately the same time as the exposure to process and save the image, a 20 minute exposure will take the camera a further 20 minute or so to process and save the image, so use with caution.

IIRC this only works if shooting jpeg.

[antoeknee]

A head torch is a good idea even if only to see where you’re going. Turn it off while taking your shot and if there are other with you, don’t spoil their shots either. As I said earlier, familiarise yourself with your camera and lens and practice using them in darkness. It’s worth focussing on something very distant, so you can see where the focussing mark is, as it probably won’t be exactly on the infinity mark. Then you know where to set the focus ring in darkness. There is no need to bother with long exposure noise reduction.

John

If possible try and get red filter for a head torch as this will help preserve your night vision.

[TonyT]

I nearly forgot, and I rechecked, put it in a ziplock bag when coming indoors to prevent condensation forming, and leave the lens on. see link for more

http://shuttermuse.com/cold-weather-...rotect-camera/

https://www.dpreview.com/forums/thread/2919124

[Jonathan Teatime]

IIRC this only works if shooting jpeg.

According to the discussion here it does effect files at the RAW level;

My understanding is that it works by taking a dark-frame exposure of the same duration as the image exposure and then subtracting it at the RAW file level.

[antoeknee]

According to the discussion here it does effect files at the RAW level;

Seem to remember that its not applied unless you use Canon software. Also it may make matters worse at high ISO.

This site contains some info.
https://improvephotography.com/48889...reduction-use/
The manual method looks quite interesting.

[Jonathan Teatime]

Sorry but everything I can find on the subject indicates that the LENR occurs in camera and is applied to RAW files irrespective of the external processing software used. And yes it can have a negative effect on the resulting image, if it was something I was worried about I would definitely be doing my own dark frame and process accordingly in PS.

[Jonathan Teatime]

All of which does not detract from my initial comment to use the function with caution.