I wonder what the difference is for? By scientific, I include consumer astronomy cameras which can cost as little as $200.00. Seems like it might
tie-in to processor power as consumer astronomy cameras are tied to laptops or tablets.
On 18/04/2022 11:38 am, RichA wrote:
I wonder what the difference is for? By scientific, I include consumer astronomy cameras which can cost as little as $200.00. Seems like it might tie-in to processor power as consumer astronomy cameras are tied to laptops or tablets.
???? Do you mean that 'they' use 16-bit processors ?
On 18/04/2022 11:38 am, RichA wrote:
I wonder what the difference is for? By scientific, I include
consumer astronomy cameras which can cost as little as $200.00. Seems
like it might
tie-in to processor power as consumer astronomy cameras are tied to
laptops or tablets.
???? Do you mean that 'they' use 16-bit processors ?
Am 18.04.2022 um 05:55 schrieb geoff:
On 18/04/2022 11:38 am, RichA wrote:
I wonder what the difference is for? By scientific, I include
consumer astronomy cameras which can cost as little as $200.00.
Seems like it might
tie-in to processor power as consumer astronomy cameras are tied to
laptops or tablets.
???? Do you mean that 'they' use 16-bit processors ?
Perhaps the A/D converters of these cameras have 16 bit?
Having more bits in A/D increases noise.
Astronomy "cameras" I have seen include a Peltier cell to cool the
sensor and reduce thermal noise. Probably more expensive units use
liquid CO2 or N2.
Having more bits in A/D increases noise.
nope. having more bits increases dynamic range, making noise less of an issue.
Astronomy "cameras" I have seen include a Peltier cell to cool the
sensor and reduce thermal noise. Probably more expensive units use
liquid CO2 or N2.
that's separate issue and unrelated to bit depth.
Surely it relates to 'useful' bit depth - the lower the thermal noise,
the greater dynamic range achievable.
In article <vgn3ji-81s.ln1@Telcontar.valinor>, Carlos E.R. <robin_listas@es.invalid> wrote:
Having more bits in A/D increases noise.
nope. having more bits increases dynamic range, making noise less of an issue.
Astronomy "cameras" I have seen include a Peltier cell to cool the
sensor and reduce thermal noise. Probably more expensive units use
liquid CO2 or N2.
that's separate issue and unrelated to bit depth.
Having more bits in A/D increases noise.
In article <Zo-dnaFrT-2K5_3_nZ2dnUU7-cednZ2d@giganews.com>, geoff <geoff@nospamgeoffwood.org> wrote:
Having more bits in A/D increases noise.
nope. having more bits increases dynamic range, making noise less of an
issue.
Astronomy "cameras" I have seen include a Peltier cell to cool the
sensor and reduce thermal noise. Probably more expensive units use
liquid CO2 or N2.
that's separate issue and unrelated to bit depth.
Surely it relates to 'useful' bit depth - the lower the thermal noise,
the greater dynamic range achievable.
true, but thermal noise in the sensor is still independent of bit depth
of the a/d.
Having more bits in A/D increases noise.
nope. having more bits increases dynamic range, making noise less of an >>> issue.
Astronomy "cameras" I have seen include a Peltier cell to cool the
sensor and reduce thermal noise. Probably more expensive units use
liquid CO2 or N2.
that's separate issue and unrelated to bit depth.
Surely it relates to 'useful' bit depth - the lower the thermal noise,
the greater dynamic range achievable.
true, but thermal noise in the sensor is still independent of bit depth
of the a/d.
That's a bit of a backwards way of looking at it !
Lower thermal noise potentially allows more benefit to be obtained when
used with a higher bit-depth A-D.
Am 19.04.2022 um 23:51 schrieb Carlos E.R.:
Having more bits in A/D increases noise.
More bits reduce the quantisation noise.
Having more bits in A/D increases noise.
More bits reduce the quantisation noise.
Yes.
But the "analog" noise makes the least significant bits in the A/D
converter useless, so they simply don't make those and save money.
Now,
make the sensor less noisy, get a stable "analog" signal, with noise
levels under the value of the last bit in the converter, and you can add bits.
On 2022-04-19 21:05, Alfred Molon wrote:
Am 18.04.2022 um 05:55 schrieb geoff:
On 18/04/2022 11:38 am, RichA wrote:
I wonder what the difference is for? By scientific, I include
consumer astronomy cameras which can cost as little as $200.00.
Seems like it might
tie-in to processor power as consumer astronomy cameras are tied to
laptops or tablets.
???? Do you mean that 'they' use 16-bit processors ?
Perhaps the A/D converters of these cameras have 16 bit?Having more bits in A/D increases noise.
Astronomy "cameras" I have seen include a Peltier cell to cool the
sensor and reduce thermal noise. Probably more expensive units use
liquid CO2 or N2.
--
Cheers, Carlos.
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