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TOPIC: Sensor warm Up doing long exposure

Sensor warm Up doing long exposure 4 years 10 months ago #686

  • Serdar Dikdik
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our friend Olaf shared a knowledge I did not know. He informed that "During long exposures, the sensor is warming up, noise is increasing then. So it might be better in certain situations, to increase the ISO a little bit to decrease the exposure-time"


this knowledge makes me think, so if the sensor is warming up and creating noise in the long exposure(the topic was about 120sec exposure), how are we shooting movies as long as 20minutes or longer without the noise?
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Re: Sensor warm Up doing long exposure 4 years 10 months ago #692

  • Olaf Kleemeyer
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Good question. I don´t know. I read about this sensor-warmup in serveral books about lowlight- an nite-photography. And it seemed logical to me and comes up with my own experiences. But maybe it´s obsolete due to the modern and improved sensors. I don´t know :unsure:
Nikon D700, Nikkor 24mm 1.4, 50mm 1.4, 70-200mm 2.8
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Re: Sensor warm Up doing long exposure 4 years 10 months ago #695

  • Serdar Dikdik
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I cought you olaf I cought you my friend hahaha
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Re: Sensor warm Up doing long exposure 4 years 10 months ago #696

  • Olaf Kleemeyer
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Maybe you caught me :) But I´m not sure, although I wouldn´t mind. On the other hand, consider that doing video on DSLR means nothing but shooting 20 or 30 single frames per second. This might be a difference comparing to exposing one frame for 30 seconds or even for minutes. Maybe somebody around here has more knowledge about that than we have ;)
Nikon D700, Nikkor 24mm 1.4, 50mm 1.4, 70-200mm 2.8
Last Edit: 4 years 10 months ago by Olaf Kleemeyer.
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Re: Sensor warm Up doing long exposure 4 years 10 months ago #703

  • Serdar Dikdik
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My friend I am engineer cant help, questions come to my mind:

If video shooting is just like taking pictures 1/30 shutter speed continuously up to 30 pictures a second as you say,Than why we are not hearing the shutter sound clicking while shooting movie
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Re: Sensor warm Up doing long exposure 4 years 10 months ago #705

  • Jeff Bullman
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While shooting video you're only using around 2 megapixels, guess the noise just fades away at that resolution.
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Re: Sensor warm Up doing long exposure 4 years 10 months ago #708

  • thibault
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lol! the shutter doesn't open or close during video, your sensor and processor do all the work.
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Re: Sensor warm Up doing long exposure 4 years 10 months ago #711

  • Serdar Dikdik
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I agree with you,so if the sensor is open all the time, than how it is not warming up. like said in above posts
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