The range of prime focus lenses for the Pye Mk3 Television Camera

842247 | Mk3 | Prime Lens | Focal length 2.5", f1.9, Horiz. angle 28.5° |

842248 | Mk3 | Prime Lens | Focal length 4", f1.9, Horiz. angle 18° |

842249 | Mk3 | Prime Lens | Focal length 5", f1.9, Horiz. angle 14.5° |

842250 | Mk3 | Prime Lens | Focal length 8", f2.9, Horiz. angle 9° |

842251 | Mk3 | Prime Lens | Focal length 12", f4.5, Horiz. angle 6° |

842252 | Mk3 | Prime Lens | Focal length 17", f5.6, Horiz. angle 4.25° |

842253 | Mk3 | Prime Lens | Focal length 20", f5.6, Horiz. angle 3.5° |

842254 | Mk3 | Prime Lens | Focal length 24", f6.5, Horiz. angle 3° |

842255 | Mk3 | Prime Lens | Focal length 2", f1.9, Horiz. angle 36° |

842271 | Mk3 | Prime Lens | Focal length 6", f3.5, Horiz. angle 12° |

842272 | Mk3 | Prime Lens | Focal length 6", f2.9, Horiz. angle 12° |

842274 | Mk3 | Prime Lens | Focal length 9", f5.6, Horiz. angle 8° |

842275 | Mk3 | Prime Lens | Focal length 3", f1.9, Horiz. angle 24° |

842276 |
Mk3 | Prime Lens | Focal length 39mm., f2, Horiz. angle 45° |

842284 | Mk3 | Prime Lens | Focal length 40", f9.4, Horiz. angle 2° |

The lens has a quick change mounting flange which is unique to the Pye Mk3. Incorporated into the mounting flange is a resistor network that forms part of the focus servo amplifier positioning feedback
such that the rotation of the focus control had the same range for each lens and the tube adopted a
suitable position, on a lens change, to be still at the point of focus for the newly changed lens.