Understanding Your Digital Camera

Transcript

1. Understanding Your Digital Camera @wanjun
2. Overview and Expectations • Technicals: ◦ How DSLR and mirrorless cameras capture an image ◦ Lenses • Camera settings and how/why to use them • Questions/Intro • Goal: using your own camera in manual mode
3. DSLR Anatomy • Digital Single Lens Reflex • Pentaprism -> WYSIWYG • Mirror Flip Up
4. Mirrorless Anatomy
5. What is a “Lens”? In the case of your eye, your eye's lens tries to target light onto the back of your eyeball.
6. • 17-85 mm - focal length. Zooms from 17mm to 85mm. • 67mm - thread filter size • EF-S - mount type • IS - Image Stabilization • USM - ultrasonic motor for AF • 1:4-5.6 maximum aperture is f4 at 17mm end, f5.6 at 85mm end
7. Understanding Digital Camera Sensors • An array of millions of color-sensitive photosites ◦ Captures the specific photos that fall into each cavity • Human eye more sensitive to green. • Each GRBG square is one pixel.
8. Three most important factors of how light is collected in order to make a proper exposure. Exposure Triangle ISO SHUTTER SPEED APERTURE
9. Shutter Speed • For how long is the sensor collecting light • Shutter speed priority mode S or Tv
10. ISO 125 1/40 sec f4.0
11. Aperture Area • An opening in which light passes through • Smaller f number means larger aperture ◦ It’s a ratio - given the same focal length, larger diameter means smaller aperture number • Aperture priority mode - A or Av • Large opening -> more light gathered.
12. ISO 100 1/800 sec F2.8
13. ISO • Sensitivity of the recording medium to incoming light. Also known as “film speed”. • Lower ISO is always more desirable! Truest details and colors. • However sometimes we are limited by the amount of light we have, so we push up the ISO
14. ISO 12800 1/40 sec f4.0
15. The Exposure Triangle
16. Preprogrammed Exposure Modes Macro small aperture Landscape small aperture Sport fast shutter speed Portrait large aperture Night Portrait large aperture, high ISO, flash
17. Focusing on Focus How to Focus • press shutter half way down • Detects contrast • change its location Focus Modes • Single Area AF ◦ AF-S in Nikon ◦ One-Shot in Canon • Continuous ◦ AF-C in Nikon ◦ AI-Servo in Canon • Hybrid
18. Metering Whether your camera thinks you have enough light for your focus area.
20. Closer Look at the Lens - Normal
21. ISO 200 1/50 sec F2.8 50mm
22. Closer Look at the Lens - Telephoto
23. ISO 100 1/125 sec F9.0 135mm
24. Closer Look at the Lens - Wide Angle
25. ISO 100 1/80 sec F2.0 24mm
26. Common Accessories • Tripod • Circular polarizer • UV Filter • Flash • Camera Straps