Why do digital cameras above ISO200 have noise

It can be assumed that cameras in this price range are like this.

The CCD of the camera with good noise control is relatively large, and the CCD is relatively high, such as Canon 1DS mark3 and ISO800 can be smooth and noise-free, but it is also very high, about 35000.

The ones with less noise are generally SLR machines, and the price of small DC is not too demanding.

Card machines are almost like this, and 80% of my Panasonic shoots have **iso at 100

Due to sensor size and cost limitations, consumer-grade small DCs are unlikely to use the same large sensors and advanced image processing systems as high-end SLR cameras. So the noise control ability is far inferior to that of high-end DSLR cameras.

For example, the Nikon D3 camera, at a sensitivity of 3200, the picture is very pure.

Small cameras are like this.。。 DSLRs are much better.

800 is very clear!!

It's best to hit 50 or 100 ISO for small cameras!

Use more flash!

It's not normal, so is mine, I just bought it the day before yesterday, under the harsh conditions of 30s, there are more than 1000 points... Horror bar (but less than 1s is not,) I just changed one today, in fact, the performance is about the same, if you just bought it in the past two days, I suggest you go for a change, but it may not be able to change to a good one, because there may be a batch of goods have problems, mine too. Never buy Fuji again.

This general card machine seems to be like this, the SLR is much better in terms of picture quality, and as long as it is not enlarged to 100%, it is not too obvious.

Human technology.

and cost limitations.

It's a common problem with digital cameras at this price point.

Not to mention this price, as long as it is not a high-end SLR, the small DC ISO will increase a lot of noise if it is slightly higher.

And the DSLR, especially the high-end ones, still looks very good at ISO800.

Of course, value stands for quality.

Above ISO200, there is a relatively noticeable noise, mainly due to the lack of **.

**Enough + **High quality Noise is basically hard to see.

The ISO value is 4000, how about the noise.

Hello, the noise of the ISO value of 4000 is relatively high, because the higher the ISO value, the higher the sensitivity of the camera, which will make the noise more likely. Here are some suggestions for reducing noise:1

Use the camera noise cancellation feature: Many cameras have a noise cancellation feature, and it may be helpful to turn it on in the camera settings before cong. Note, however, that in some cases, the feature may affect detail and clarity.

4.Post-processing: If you can't avoid high noise, you can make use of post-production software such as Lightroom or Photoshop to adjust and remove noise.

Note, however, that excessive noise removal may result in a loss of detail and quality of the image. In conclusion, try to avoid using excessively high ISO values when shooting, and try to reduce noise in ** by bleeding as suggested above.

When taking photos, if the camera's ISO is set high, noise and even color spots will inevitably appear in the image. Therefore, the dolphin machine uses the internal curing process to smear the image and erase all the details at the same time, so as to make the surface look smoother. The results speak for themselves, and some netizens jokingly refer to it as the "oil painting effect".

This is called noise reduction, and even advanced DSLRs are the same.

Therefore, no matter how advanced the noise reduction algorithm boasted by the manufacturer is, it is actually a lie and cannot fundamentally solve the problem. I don't currently see any cameras with noise reduction that can be achieved without losing detail. In addition, even if you take photos in RAW format, the noise is still noticeable even when the ISO setting is high, and even if the noise is reduced by software, it will come at the cost of losing detail.

I have almost all kinds of RAW processing software installed on my computer. I've found that even the latest version of Silkypix Developer Studio, which claims to have the best noise reduction, is the same.

So, fundamentally, the direct cause of how much noise is the size of the CCD area. The larger the area of the CCD, the less noise there is. This can be demonstrated by the fact that a small digital camera with a 1-inch CCD has less noise than a small digital camera with a 1-inch CCD, or that a DSLR camera with a large CCD has less noise than a small digital camera with a small CCD.

The higher the camera ISO is adjusted, the higher the light speed, the less light is required, the less light the sensor receives, and the more noise there is.

ISO is a representation of sensitivity, and the camera's sensitivity is adjusted according to the intensity of the light source.

When using traditional cameras, we can choose different sensitivity (speed) negatives according to the brightness of the shooting environment, for example, we can use ISO200 in the environment of a cloudy day, ISO400 or higher in the environment of a dark environment such as a stage and a concert, and the digital camera also has a similar function, it changes the ISO value by changing the magnification of the signal amplifier in the sensor chip, but when the ISO value is increased, the amplifier will also amplify the noise in the signal, resulting in a coarse particle image, so the higher the ISO, The more likely it is to make noise.

The photosensitive ISO is generally set to the lowest and cannot exceed 200

It seems to say that the higher the ISO, the higher the voltage applied to the sensor, the higher the voltage, the higher the temperature, and the higher the temperature, the more likely the sensor is to produce false signals, so the more noise.

The main function of ISO is to be able to carry out a normal ** in a darker environment or in the case of a fixed aperture, the higher the ISO, the stronger the sensitivity ability, and the stronger the ability to capture light in a dark environment, but its image quality will be sacrificed, which is usually said to be more noisy earlier. Therefore, under normal circumstances, ISO will not be set so high, and it is more likely to use auxiliary light or a lens with a wide aperture, unless you want to capture a moving object at night, and it is very useful to use high sensitivity.

The following is a more professional statement, the image sensor of the digital camera is an active element, there is a dark current, the cut-off current is set in the normal mode, and the part with noise interference will not be used, and the high sensitivity mode uses the part with large noise, and the background noise is reflected on the image is random noise. As long as the sensor is not improved and the aperture does not change, the problem cannot be truly improved, and at most the algorithm is used to weaken the intuitive feeling of noise, which is why cameras with high ISO tend to have larger lenses and larger size sensors.