Contents

• OPTICS
  • General Description
  • Prime Focus Correctors
    • General features
    • Aspheric plate
    • Doublet
    • Triplet
  • The Cassegrain focus
  • Sub-Beam Prism
  • Filters
• PRIME FOCUS CAGE
  • Cage Rotation
  • Guide/Focus Handset
  • Intercom
  • Telephone
  • Slew Inhibit
  • Emergency Stop
  • Autoguider ON-OFF
  • Light Switch
  • Filter Holder Box
  • Wall Pockets
  • Music Speaker
  • Nitrogen Flow
  • Prime Focus Checklist
• THE PRIME FOCUS CAMERA
  • Plate Holders
    • 10 10 inch holders (7 of these)
    • 5 7 inch holders (5 of these)
  • Focus
  • Factors affecting focus
  • Camera Head and its Orientation
    • Shutters
  • Guide Probes
    • Selection of Guide Stars
    • Visual Selection
    • Selection by means of overlay
    • Selection by calculation.
  • Operation of the Autoguider
  • Remote Operation
    • PF Sensitometer
• HYPERSENSITISATION, PLATE HANDLING
  • Plate Availability and Storage
  • Mechanisms of Hypersensitising
  • Kodak Packaging
  • Loading the Hypering Boxes
  • Baking
  • Hydrogenation
  • Plate Testing
  • Estimation of Telescope Exposure Time
  • Determination of Hypering Recipes
  • Hypersensitising IV--N Plates
  • Loading Plateholders, Exposure in Nitrogen
  • Plate Cutting using the IOS Model 42 Cutter. (see Note 1)
• WORKING NOTES FOR PHOTOGRAPHY AT f/8
  • The Camera
  • Plate Holders
  • Focus
  • Filters
  • Plate availability and processing
  • Rapid changes to direct photography during the night
• PLATE PROCESSING AND COPYING
  • Procedure for development of 10 10 and 5 7 inch plates using tray rocker development in the 5th floor darkroom
  • Development Procedure. (Note 8)
  • Developing 2 2 inch plates using nitrogen burst development
  • Plate Copying
  • Ownership of Plates and Copies; Plate Log
• PHOTOGRAPHIC FACTS, FIGURES AND FORMULAE OF USE TO ASTRONOMERS
  • Photographic exposure ( E)
  • Photographic density ( D)
  • Photographic contrast ()
  • Photographic sensitivity ( S)
  • Detective Quantum Efficiency (DQE)
  • Detectivity ( P)
  • Average Thickness of Spectroscopic Emulsions
  • Limiting Magnitude.
  • Absolute Values of Sensitivity for some Astronomical Emulsions.
• REFERENCES
  • Other Reading
  • Books, Conference Reports
• About this document ...