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Occasional Contributor
Posts: 16
Registered: ‎07-18-2017
Accepted Solution

Long exposure noise comparison

Hi!
It is known that one of reasons for noise appearing in long exposures is increasing temperature of sensor. This drives me to a question:
Is it true that long exposures will be less noisy in cold nights than warm nights? I mean, comparing more-less +20 Celsius and 0 Celsius. Cold air could serve as a natural cooler Smiley Tongue
I can't prove it by myself now cuz I only have warm nights Smiley Tongue

Valued Contributor
Posts: 366
Registered: ‎10-21-2016

Re: Long exposure noise comparison

[ Edited ]

Yes, this is the reason why many astrophotographers use specialised cameras that have cooling systems on the sensor.

These usually cool the sensor to 0 C or a couple of degrees above. The trouble with an ordinary digital camera is that there is a lot of electronics and the battery close to the sensor and the heat from these will counteract some of the effect of lower air temperatures around the camera.

Occasional Contributor
Posts: 16
Registered: ‎07-18-2017

Re: Long exposure noise comparison

Wow.
New Contributor
Posts: 1
Registered: ‎07-07-2019

Re: Long exposure noise comparison

[ Edited ]

@Ray-uk wrote:

Yes, this is the reason why many astrophotographers use specialised cameras that have cooling systems on the sensor.

These usually cool the sensor to 0 C or a couple mcdvoice of degrees above. The trouble with an ordinary digital camera is that there is a lot of electronics and the battery close to the sensor and the heat from these will counteract some of the effect of lower air temperatures around the camera.


that's correct

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