EUROLAB laboratory provides testing and compliance services within the scope of ISO 2240 standard. The ISO 2240 standard, developed by the International Organization for Standardization (ISO), specifies the method for determining the ISO speed of inverted color camera films that produce continuous-tone pictorial images intended for projection on transparent illuminators or as slides.
It also applies to 8mm and 16mm motion picture films used in non-professional applications. ISO 2240 does not apply to professional motion pictures regardless of their application.
The purpose of ISO speeds is to provide accurate exposures with exposure meters conforming to ISO 2720 and, where appropriate, automatic exposure controls for cameras conforming to ISO 2721; the resulting camera exposure will normally lead to color transparencies or motion pictures of the best quality.
For an average scene and average camera, the specified camera exposure will be approximately midway between the lowest and largest exposures needed to produce transparencies and motion pictures suitable for viewing at normal brightness levels.
For the purposes of this International Standard, the normal luminance of transparency illuminators is assumed to be as described in ISO 40, with a direct-to-ambient luminance ratio of approximately 1:3664. The normal brightness of transparency projection screens is assumed to be approximately 137 cd/m².
The screen brightness of 8mm Type R and 8mm Type S (Super-8) motion picture projection is assumed to be in the range of approximately 40 cd/m² to 62 cd/m2. Therefore, it may be desirable to increase exposure above 25% of that achieved using the rate obtained following the sensitometric procedure described in this International Standard.
Many camera manufacturers design and calibrate their 8mm Type R and 8mm Type S action cameras with a setting that allows more exposure to compensate for the low screen brightness of normal projection conditions.
Among the services provided by our organization within the framework of material testing services, there are also ISO 2240 standard tests. Do not hesitate to contact our laboratory EUROLAB for your testing and certification requests.
To get an appointment, to get more detailed information or to request an evaluation, you can ask us to fill in our form and reach you.
EUROLABreporting and certification activities, United Accreditation Foundation (UAF), Turkish Accreditation Agency (TÜRKAK) ve Enterprise Accreditation Foundation (EAF) based on the accreditation provided by the accreditation body. The Enterprise Accreditation Foundation (EAF) accreditation body is also a signatory of the United Nations (UN GLOBAL COMPACT) organization.
