Fundamentals of Digital Dental Photography

RAW vs. JPEG formats, which is greater possible colors?

Raw has 4.3 trillion possible colors while JPEG only has 16 million

How are RAW images captured?

All info is from the sensor, producing higher quality images

How are JPEG images processed?

Inside the camera, and ready to be used immediately

What are some advantages of RAW images?

More flexibility in post production, authenticity and evidence of ownership

What are some advantages of JPEG images?

Ready to be used immediately, shoot more images in burst mode, can add but not remove

What are some disadvantages of RAW images?

Unfinished images

What are some disadvantages of JPEG images?

Smaller than RAW, limited post production

What are the three components of exposure control?

Shutter speed, ISO, and aperture all work together to register the proper amount of light in any given scenario

What is shutter speed?

How fast the shutter will close; the amount of time that the shutter stays up, and it can vary from a split second to multiple hours

The shutter is like a curtain that blocks your sensor from the light coming through your lens until

It is ready to take a picture

1/8000s shutter speed will produce a

Frozen and darker image

1/4s shutter speed will produce a

Moving and brighter image

What is aperture?

A hole or an opening through which light travels; like the pupil of an eye that changes diameter to adjust how much light gets through

How is aperture measured?

In f-stops

An aperture of f/1.4 will produce a

Large aperture, brighter image, shallow depth of field

An aperture of f/16 will produce a

Small aperture, darker image, and deep depth of field

What is ISO?

Indicates how sensitive the sensor is to light

An ISO of 200 produces

Less digital noise

An ISO of 1600 produces

More digital noise

Is it better to have a flash that is under or over exposed?

Neither? but under is better

What is AF-A setting for focus?

Auto

What is AF-S setting for focus?

Best for non-moving subjects

What is AF-C setting for focus?

Best for moving subjects

What is spot metered mode?

Focus on a single point

What is center weighted metered mode?

Focuses on central part (adjustable)

What is matrix metered mode?

Best in evenly lit area

What type of lighting is around 5200K?

Daylight/neutral sunlight

What is a color space?

A system used to represent and display colors in digital images

Which color space has a wider range of colors?

Adobe RGB

Which color space is best for professional printing?

Adobe RGB

Which color space is best for websites?

sRGB

What are some advantages of sRGB?

Simplified workflow, displays correctly for Web, suitable for prints

What are some disadvantages of sRGB?

Cannot be converted to Adobe RGB, narrower range of color

What are some disadvantages of Adobe RGB?

Complicated workflow, will not display correctly for Web without conversion

What are some important components of clinical photos?

Retractors, mirrors, defoggers, and patient positioning