sgvideoman
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Possible. In professional camcorders, the ND filters are activated using a sliding mechanical switch.
Why do I get grainy video?
- Thread starter Siraj
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Possible. In professional camcorders, the ND filters are activated using a sliding mechanical switch.
Hey Parchiao, thanx so much for the link! Gave a newbie like me a good start in videography. So much to read, so little time.
These points lead me to another question. Does that mean a 3CCD 1/3" CMOS camcorders is better off that a single 1/3" CMOS for low light shooting? Or does 3CCD CMOS means better colour reproduction but not for low light? Blur now...:dunno:
These points lead me to another question. Does that mean a 3CCD 1/3" CMOS camcorders is better off that a single 1/3" CMOS for low light shooting? Or does 3CCD CMOS means better colour reproduction but not for low light? Blur now...:dunno:
3CCD camcorders offer better colours while larger sensors with less pixel count offer better low light capability, this is just the theory. However in real life, there is a lot in the software and additional processing hardware of each camcorder that will differentiaite between one camcorder and another of similar sensor specs.
sgvideoman
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These points lead me to another question. Does that mean a 3CCD 1/3" CMOS camcorders is better off that a single 1/3" CMOS for low light shooting? Or does 3CCD CMOS means better colour reproduction but not for low light? Blur now...:dunno:
CCD and CMOS are not the same thing. You can't have CCD CMOS or CMOS CCD.
Maybe this might help to explain the difference between CMOS and CCD.
Definition of: CMOS image sensor
A CMOS-based chip that records the intensities of light as variable charges similar to a CCD chip. Although initially used in less expensive digital cameras, the quality of CMOS sensors has improved steadily.
CMOS sensors have advantages over CCDs. They can be made like other CMOS chips on standard CMOS fabrication lines, which makes development less costly, and auxiliary circuitry, such as analog-to-digital conversion, can be combined on the same chip. In addition, CMOS chips use less power than CCDs.
No Charge Coupling
Unlike CCD sensors, CMOS image sensors do not use charge coupling, which transfers charges to a second bank of photosites before sending them out for analog-to-digital conversion. Because they are standard CMOS chips, CMOS image sensors have amplifiers and output circuitry connected to each photosite.
Definition of: CCD
(Charge-Coupled Device) An electronic memory that records the intensity of light as a variable charge. Widely used in still cameras, camcorders and scanners to capture images, CCDs are analog devices. Their charges equate to shades of light for monochrome images or shades of red, green and blue when used with color filters. Devices may use three CCDs, one for each of the red, green and blue colors.
Why It's Coupled
The "coupled" in the name is because the CCD is comprised of an array of imaging pixels and a matching array of storage pixels that are coupled together. After the imaging array is exposed to light, its charges are quickly transferred to the storage array. While the imaging CCDs are being exposed to the next picture, the storage CCDs from the last picture are being read out a row at a time to the analog-to-digital converters (A/D converters) that transform the charges into binary data to be processed.
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As you can see, CMOS image sensor and CCD sensor are two different design that achieve the same objectives but function differently.
Definition of: CMOS image sensor
A CMOS-based chip that records the intensities of light as variable charges similar to a CCD chip. Although initially used in less expensive digital cameras, the quality of CMOS sensors has improved steadily.
CMOS sensors have advantages over CCDs. They can be made like other CMOS chips on standard CMOS fabrication lines, which makes development less costly, and auxiliary circuitry, such as analog-to-digital conversion, can be combined on the same chip. In addition, CMOS chips use less power than CCDs.
No Charge Coupling
Unlike CCD sensors, CMOS image sensors do not use charge coupling, which transfers charges to a second bank of photosites before sending them out for analog-to-digital conversion. Because they are standard CMOS chips, CMOS image sensors have amplifiers and output circuitry connected to each photosite.
Definition of: CCD
(Charge-Coupled Device) An electronic memory that records the intensity of light as a variable charge. Widely used in still cameras, camcorders and scanners to capture images, CCDs are analog devices. Their charges equate to shades of light for monochrome images or shades of red, green and blue when used with color filters. Devices may use three CCDs, one for each of the red, green and blue colors.
Why It's Coupled
The "coupled" in the name is because the CCD is comprised of an array of imaging pixels and a matching array of storage pixels that are coupled together. After the imaging array is exposed to light, its charges are quickly transferred to the storage array. While the imaging CCDs are being exposed to the next picture, the storage CCDs from the last picture are being read out a row at a time to the analog-to-digital converters (A/D converters) that transform the charges into binary data to be processed.
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As you can see, CMOS image sensor and CCD sensor are two different design that achieve the same objectives but function differently.
Ok so I know the difference between CCD and CMOS now.. thanx for the info. However now if I would like to purchase a camcorder what should I look for to determine reasonable quality for low light performance?
jaegersing
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It's not easy to generalise. There are specs for sensitivity, but different cameras have different levels of noise so it's not easy to know from the spec what the image will be like. Also we would not know your individual tolerance for image noise - what is OK for me might be not acceptable for you. Best thing is to read the reviews or get recommendations from someone that knows.
If low light operation is a big requirement for you, I doubt if you can beat the Sony VX2100. It's not cheap though.
anakin0618
New Member
Another option that you may want to consider is to buy an additional light to increase the scene brightness since you had just purchase a new video camera already. This will be a more economical option. The video light will come in handy for many situation.
I had personally using addition video light for my shoot even though my camera have better low light sensitive. The result is much better than pushing the gain.
I had personally using addition video light for my shoot even though my camera have better low light sensitive. The result is much better than pushing the gain.
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