Class 1 and class 2 detectors

Discussion in 'Legacy Models (ST, STL, etc.)' started by Dale Mais, Aug 19, 2019.

  1. Dale Mais

    Dale Mais Cyanogen Customer

    Jun 1, 2018
    Besides the price what is the difference exactly between class 1 and class 2 detectors?

    Dale Mais
  2. Doug

    Doug Staff Member

    Sep 25, 2014
    Class 1 sensors have tighter defect classification than Class 2 sensors - typically fewer hot pixels, fewer bad columns, etc.

    Some sensors don't have multiple grades, e.g. KAF-16803 is only available in one standard grade. Others have Class 1 and Class 2. Some sensors from other manufacturers have multiple levels available.

    There is usually also an "engineering grade" option as well, which is a sensor that works but doesn't meet specifications. They are a lot less expensive but the manufacturers often limit quantities to one or two. They are intended to be used during camera design, rather than in products.

    The manufacturer charges a lot more for Class 1, which is why the cameras are more expensive.
  3. Colin Haig

    Colin Haig Staff Member

    Oct 27, 2014
    Usually professional research applications (professional astronomers, research projects, science instruments) or experienced astrophotographers want Class 1 sensors;
    People who are doing casual imaging are usually very happy with Class 2.
    Also, sometimes "Class 1" is referred to as "Grade 1".

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