Video Camera Lens Fundamentals Carlo Beltrano www.canonbroadcast.com.

Slides:

Advertisements

Similar presentations

Elements of Exposure.

Advertisements

Aperture, Exposure and Depth of Field

Design of photographic lens Shinsaku Hiura Osaka University.

Lens  The lens is the most important part of the camera  Lens captures light and focuses the light on the part of the camera that receives the image.

Digital Camera Essential Elements Part 1 Sept

Camera/Video. CCD DSP lux 3.6 mm f/ deg. 1/3”

Camera Basics Level 1 Film Technology Canon XL-1.

Properties of Lenses Dr. Kenneth Hoffman. Focal Length The distance from the optical center of a lens to the film plane (imaging chip) when the lens is.

Journey Through a Camera

The Camera Chapter 4.

Video Basics – Chapter 4 The Video Camera.

... M A K E S Y O U R N E T W O R K S M A R T E R Lenses & Filters.

Evaluate. Review: Light Volume Control: 1. f stops are light transmission standards: f 8 transmits the same amount of light for any lens. 2.Lenses can.

Photography Basics. The Process The Exposure - Camera and Lens Developing - Dark Room or PS… Printing – Darkroom or InkJet.

CAMERAS AND LENSES The Essential Reference Guide for Filmmakers.

Chapter 4: Cameras and Photography Depth of Field –Circle of Confusion –Effect of aperture Apertures –F-stop –Area –Depth of field Exposure –Shutter speed.

Beam Splitter. Studio camera on studio pedestal ENG Field Camera for tripod or shoulder.

Extreme Macro Photography Greater than 1:1 by Meyer Franklin.

Camera Lenses There are many types of camera lenses available for SLR cameras. What lens you decide to use depends on what is available to, what you are.

How to capture attention with the Video Camera. There are 3 main ways that a filmmaker can draw attention to an item in a scene Focus Zoom Insert Shot.

Design of photographic lens Shinsaku Hiura Osaka University.

LENSES Pertemuan 5 Matakuliah: O0382 – Dasar-dasar Produksi Siaran Televisi Tahun: 2010.

Lenses Are classified by their Focal Length. The distance from the optical center of a lens to the front surface of the imaging device.

Camera Education Department (RSS) December, 1999 Physics.

Lecture Digital Video. Scanning vs. aspect ratio SDTV –525 (vertical) res of interlaced scanned lines (actually 300x480) –Aspect ratio of 4:3 HDTV –Most.

Photography Lesson 2 Pinhole Camera Lenses. The Pinhole Camera.

Magnifiers, Projectors, CamerasPaul Avery (PHY 3400)1 Magnifiers, Projectors, Cameras Applied Optics Paul Avery University of Florida

Mark Schubin, HPA Technology Retreat, 2006 February 23 1 Small Format HD Acquisition Part 1 – What’s Out There Part 1 – What’s Out There Part 2 – The Optical.

FYS 100 Creative Discovery in Digital Art Forms Fall 2008 Burg Digital Photography Assignment.

Optics Jeopardy General 1 Lens types 2 Cameras 3 Film Speeds 4 Video

1. Is 90mm a wide angle lens or a telephoto lens? 2. If I’m taking a picture of a building, why would my perspective change if I switch from a wide angle.

1. Is 90mm a wide angle lens or a telephoto lens? 2. If I’m taking a picture of a building, why would my perspective change if I switch from a wide angle.

Video Technology The Camera – Your Visual Storytelling Tool.

DIGITAL CAMERAS Prof Oakes. Overview Camera history Digital Cameras/Digital Images Image Capture Image Display Frame Rate Progressive and Interlaced scans.

Film/Sensor Where the light is recorded Lens Bends the light Trajectory of light Subject Source of light Focusing A look at the overall camera system.

LENSES The specs: focal length maximum aperture “long lenses, short lenses fast lenses, slow lenses” Fixed focal length (prime) or zoom.

Math in Photography © UNT in partnership with TEA

Film Appreciation 124. Uninterrupted sequence of frames.

Unit 57 – Photography Lenses. Lenses of different focal lengths allow photographers to have more creative control 1.Standard lens 2.Wide-angle lens 3.Telephoto.

TYPES OF LENS/LENSES. What is a Lens? Lens or Lenses are used in conjunction with a camera body and mechanism(tool) to make images of objects either on.

Lenses Lenses define 2 important things: Angle of view (focal length) Aperture.

Inside the Digital Camera. Types of Digital Cameras Pocket CameraRangefinder SLR Like DSLR.

The Camera Lens Digital Photography. Lens Image quality is greatly affected by the quality of the lens. Lens types: fixed lenses (prime lenses) which.

Camera LENSES, APERTURE AND DEPTH OF FIELD. Camera Lenses Wide angle lenses distort the image so that extreme wide angle can look like its convex such.

selects and directs the light rays entering the camera brings light from the subjects into focus on the film.

Chapter 2: The Lens. Focal Length is the distance between the center of a lens and the film plane when focused at infinity.

In Photography, there is an Exposure Triangle (Reciprocity Theory) Aperture – size of the iris opening, how much light come into the “window” Shutter Speed.

There are four main functions of the lens…. The first and most obvious is…

Lenses Lenses define 2 important things: Angle of view (focal length) Aperture.

Video Production The Camera – another transducer.

Video Quality Lens Once you have selected a camera, the next step is to select the appropriate lenses and any other relevant components necessary in the.

1 Cinematography Videography An Overview 2 Cinematography Means literally: “ Writing in Movement” A better term than videography?

Residential Security, Access Control, and Surveillance Copyright © 2005 Heathkit Company, Inc. All Rights Reserved Presentation 16 – The Camera Lens.

Lenses Are classified by their Focal Length.

Interchangeable Lens Camera Basics

Lens sizes Depth of Field

Depth of Field Objective: to photograph a subject with a foreground and background, giving a better understanding of aperture and its relation to depth.

By your full names (2 people per group)

Aperture, Exposure and Depth of Field

Lenses Are classified by their Focal Length.

Depth of Field Refers to the zone of focus in a photograph, or the distance between the closest and farthest parts of the picture that are sharp or in.

Depth Of Field (DOF).

Depth of Field.

MicroHAWK Long Range – Launch Presentation

Depth of Field.

Depth Of Field.

Unit 57 – Photography Depth of field

Depth Of Field.

Aperture, Exposure and Depth of Field

Presentation transcript:

Video Camera Lens Fundamentals Carlo Beltrano

LENS SELECTION CRITERIA What is the application? (studio, field, news, copy stand, etc.) Which camera model? (mount type, CCD size, 16:9/4:3) What VIEWING ANGLE is required? (wide, telephoto) How much of a ZOOM RATIO is required/desired? How will the lens be controlled? (manually, controls, remotely)

VIDEO LENS SPEC 20X8 FILM LENS SPEC 8~160mm

ANGLE OF VIEW Determined by: Lens Focal Length & CCD size Angle of View = 2tan -1 Image size (CCD or film) Focal Length X 2 Standard Image Sizes 2/3” CCD (4:3):8.8mm X 6.6mm 2/3” CCD (16:9):9.59mm X 5.39mm 1/2” CCD:6.4mm X 4.8mm 35mm Movie:24.92mm X 18.67mm 35mm Still:36mm X 24mm w h

Focal Length and Image Size

VIDEO LENS NOMENCLATURE J11aX4.5 BIRS J = 2/3” CCD IRS = w/ 2X YH = 1/2” CCD VRS = w/ 0.8X WRS = w/ 2X & 0.8X KRS = none B = compensated for prism mm mm ( with 2X)

F NO = f D The smaller the F NO, the brighter the image

F- number vs T-number F NO = T NO = T NO = 3 aperture focal length F NO Transmitance % X 10 example T NO = F % X 10

2/3” LENS OUTPUT 11 mm Diameter

2/3” CCD (4:3 only) 2/3” CCD (8.8 x 6.6 mm) Lens image 11 mm Diameter

2/3” CCD vs 1/2” CCD 2/3” CCD (8.8 x 6.6 mm) Lens image 11 mm Diameter 1/2” CCD (6.4 x 4.8 mm)

2/3” CCD (16:9) 16:9 CCD (9.59 x 5.39 mm) Lens image 11 mm Diameter

2/3” 16:9 CCD (4:3 mode) 4:3 mode (7.19 x 5.39 mm) Lens image 11 mm Diameter

Fixed 4:3 CCD 4:3 CCD (8.8 x 6.6 mm) 11 mm Diameter Lens image

16:9 CCD Switchable CCD in 16:9 Mode 16:9 mode Lens image 11 mm Diameter (9.59 x 5.39 mm)

11 4:3 mode Lens image 11 mm Diameter Switchable CCD in 4:3 Mode (7.19mm x 5.39mm)

1 1 16:9 / 4:3 lens compensation With 0.82X Lens image reduced by 18.5% (9mm Diameter) Lens image 11 mm Diameter 11 Lens image reduced by approx. 20%

16:9 / 4:3 SWITCHABLE LENSES J17aX7.7 WRS J11aX4.5 WRS J22aX7.6 WRS

16:9 / 4:3 SWITCHABLE LENSES (BOX TYPE)

image size is 11mm diameter for both formats HDTV lenses vs. SDTV (NTSC) lenses Red and Blue abber. correction is better on HDTV lenses prism compensation is different between the two tracking error is minimized on HDTV lenses overall resolution is better on HDTV lenses

RGB OFFSET (2/3” LENSES) 10 um 5 um NTSC HDTV

When an SD lens is used on an HD camera, the MTF is greatly reduced when an image is slightly out of focus. The amount by which an image is out of focus which causes only a 10% MTF loss in SDTV, causes a 50% MTF loss in HDTV. MTF: HD vs SD

Depth of Field Depth of field =   x F NO x distance 2 ( focal length 2 ) - (   x F NO x distance )  permissible circle of confusion Behind Object for 2/3” ccd,  = ccd diagonal # of raster lines for SDTV,  = mm for HDTV,  = mm for 16mm,  ~ mm

Range Calculator Test Q1 Find the focal length required to satisfy the following conditions: width of stage to be in the frame: 10ft distance between camera and stage: 70ft camera: 2/3” 4:3 ccd

Range Calculator Test Q2 How far back (distance) from a stage must a camera be placed in order to satisfy the following conditions: the full stage set height of 40ft must fill the frame (vertically), for maximum depth of field, the widest part of the lens is used: in this case an 8mm focal length, you are using a 2/3” 4:3 ccd camera.

Q & A