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Test film: Difference between revisions
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* SMPTE RP-40 - Visual focus test film for 35mm | * SMPTE RP-40 - Visual focus test film for 35mm | ||
* SMPTE RP-91 - Visual focus test film for 70mm | * SMPTE RP-91 - Visual focus test film for 70mm | ||
* SMPTE Buzz Track - Sound test film to set lateral position of film in the soundhead. | * SMPTE Buzz Track - Sound test film to set lateral position of film in the soundhead. | ||
* | * Dolby CAT. NO. 69P - Pink Noise test film (contains all frequencies) used for focus and azimuth adjustment of the slit lens | ||
* CAT. NO. 69T- Dolby Tone test film | * Dolby CAT. NO. 69T- Dolby Tone test film | ||
* Dolby CAT. NO. 151 - Surround test, used for a subjective comparison of the levels for the center and surround channels. | |||
==Images== | ==Images== | ||
Revision as of 18:00, 21 May 2020
Test films are tools for calibrating, aligning, and checking film projectors and their components. Issues that can be diagnosed and corrected with the guidance of test films include ghosting, focus, framing, and pedestal adjustments. They are sometimes used in conjunction with test equipment.
The term generally refers to films made by technical bodies like SMPTE or by manufacturers like Schneider Optics specifically for test purposes, which are designed to help to calibrate your equipment so that it adheres to a certain set of image or audio standards.
In practice, term may also be used more casually to refer to any piece of footage used to test a projector, such as a fresh trailer used to conduct a scratch test.
Common types of test film
- SMPTE RP-40 - Visual focus test film for 35mm
- SMPTE RP-91 - Visual focus test film for 70mm
- SMPTE Buzz Track - Sound test film to set lateral position of film in the soundhead.
- Dolby CAT. NO. 69P - Pink Noise test film (contains all frequencies) used for focus and azimuth adjustment of the slit lens
- Dolby CAT. NO. 69T- Dolby Tone test film
- Dolby CAT. NO. 151 - Surround test, used for a subjective comparison of the levels for the center and surround channels.
Images
click to enlarge You may notice some of them are dirty, it's because they've been used many times! As they should be.
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SMPTE RP 40 35mm test film. Used for evaluating optical alignment, timing, framing and focal registration. Can be used to evaluate jitter and weave.
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Schneider Optics 35mm frame and focus chart. Used for evaluating optical alignment, timing, framing and focal registration. Great for evaluating contrast performance.
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16mm test film (BLS 1682)
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35mm Travel Ghost test film
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Can of SMPTE Travel Ghost test film
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SMPTE RP 91 5/70 test film
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Boston Light and Sound 5/70 test film on screen
Sources of test film
Other Resources
External Links
- RP31 35mm film installation by artist Lucy Raven involving various test films.