ASA acronym for American Standards Association - hence ASA400 on films is the standard film speed of 400. ISO is International Standards Organization. the two values are identical, for once there is no separate ( Metric) or different European film standard. The Germans do use the DIN ( German Industrial Norms) standards this is such that that- DIN 27 is equivalent to ASA 400. ASA and DIN are the only common film standards used today. There you have it. Get yourself a Photometer and the meanings of the various scales will be self-evident. Besides you can learn much about differing exposure values- for nearly every potential shot there are more than one possible (answers) so there are considerable variables around. Experiment!
asa is the english-speaking world's way of stating the speed rating of film;it is effectively the same as iso. Din is a parallel scale, but with different numbering.
The International Standards Organisation code (ISO) was developed to consolidate the ASA/DIN system to rate the relative speed of various films. ISO 400 film is faster than ISO 100 film, for example, making it better for low-light or fast action photos
It's a rating for the sensitivity of the film to light. The higher the number, the more sensitive. For digital, it represents a corresponding increase in the sensitivity of the ccd (the image capturing device). Either way, higher numbers trade off image quality for speed.
It is similar to ISO and is a measure of a film's sensitivity to light (or graininess of digital images). It is just a different standard organization than ISO.ISO=International Organization for Standardization.ASA=American Standards Association or something like that.Discussed here also:What_does_ISO_stand_for_in_cameras
ISO stands for International Standards Organisation, it comes from when the sensitivity of films became standardised. It refers to the speed that your camera responds to light. The higher the ISO number the more sensitive the film or digital sensor is to light. If you choose to use a lower ISO(lower sensitivity) setting you will have to have a longer exposure, this is known as slow film. Fast film is when you have a higher sensitivity and a faster exposure. A higher ISO setting allows a faster shutter speed with the same aperture setting, this means the picture will have less Blur. The downside it that the Higher the ISO the more noise (or grain) your image has.
ASA and ISO both refer to film speed, or the film's sensitivity to light. ASA is the American standard, while ISO is the international standard. They essentially measure the same thing, which is the film's sensitivity to light, with higher numbers indicating a faster film speed.
asa is the english-speaking world's way of stating the speed rating of film;it is effectively the same as iso. Din is a parallel scale, but with different numbering.
The International Standards Organisation code (ISO) was developed to consolidate the ASA/DIN system to rate the relative speed of various films. ISO 400 film is faster than ISO 100 film, for example, making it better for low-light or fast action photos
It used to be the ASA rating, but now its the ISO rating, the higher the number, the more sensitive the film is. e.g. 100 for daylight 400 for nightlight as an example.
Thin Film Electronics ASA was created in 2005.
800
To set the ISO on a film camera, you need to adjust the dial or button on the camera to the desired ISO setting. The ISO setting determines the sensitivity of the film to light. A higher ISO number makes the film more sensitive to light, while a lower ISO number makes it less sensitive. Make sure to set the ISO before taking photos to ensure proper exposure.
The highest ISO film available for purchase on the market today is typically around ISO 3200.
The five different speeds of film are ISO 100, ISO 200, ISO 400, ISO 800, and ISO 1600. These represent the sensitivity of the film to light, with higher ISO numbers being more sensitive and allowing for better performance in low-light conditions. Different speeds are chosen based on the lighting conditions and desired effect of the photograph.
It's how sensitive the film is to the light. Which is measured in ISO. If you use a film camera. The film box should say what ISO it is. If you have a digital camera, you can adjust it in certain modes in the menu. For more details you can check out http://www.geofflawrence.com/photography_tutorial_ISO_film_speed.htm
Information for the ISO standard 732 for medium format photographic film can be found on the ISO website. There is also information on the Wikipedia site.
It's a rating for the sensitivity of the film to light. The higher the number, the more sensitive. For digital, it represents a corresponding increase in the sensitivity of the ccd (the image capturing device). Either way, higher numbers trade off image quality for speed.