Film-Tech Forum ARCHIVE: standard test

This is topic standard test in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

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Posted by Ron Fleming (Member # 990) on 10-16-2002, 08:48 AM:

I'm not a certified technician but would like to run regular test's on the screen in between our regular scheduled service calls. Is there test film that I could get for this?

Posted by Ray Derrick (Member # 1001) on 10-16-2002, 08:57 AM:

RP40 (SMPTE 35PA) for the picture. Your best bet for sound would probably be the Dolby jiffy film since most of the sound alignment films are of little use without test instruments. How deep is your wallet?

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Ray Derrick
President/Chief Engineer
Panalogic Corporation Sydney, Australia
Phone: 61 (0)2 9894 6655 Fax: 61 (0)2 9894 6935

Posted by Joe Beres (Member # 678) on 10-16-2002, 09:10 AM:

What exactly would you like to test? image steadiness, focus, sound?

Posted by Steve Guttag (Member # 268) on 10-20-2002, 09:00 PM:

I would actually recommend the Schneider test film for image at the moment...it is FAR steadier than 35-PA

Steve

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"Old projectionists never die, they just changeover!"

Posted by John Pytlak (Member # 331) on 10-21-2002, 12:30 PM:

AFAIK, Arriflex will be making the Schneider/Kinoton/Optronik projector test film, as well as others:
here

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John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
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Posted by Shaun Flichel (Member # 1435) on 10-21-2002, 05:17 PM:

Even a cut up trailer could work for you, of course a still part, like right at the end, dont know what its called, but where the full screen credits come up listing actors/actresses, producer, you should know what i mean, this will show you focus and steadiness. If you want to check for ghosting, a simple Coming Soon still spliced into a loop works well, just frame it to the top and bottom edges of the screen.

Posted by Gordon McLeod (Member # 33) on 10-21-2002, 05:31 PM:

Because trailors and snipes are high speed printed they are not very valid for testing pureposes

Posted by Michael Schaffer (Member # 1204) on 10-21-2002, 05:47 PM:

What equipment do you have?

Posted by John Pytlak (Member # 331) on 10-21-2002, 09:04 PM:

A print made on a continuous contact printer can be very steady, if it is "Film Done Right". But the original must be "short pitch" (BH-1866 perforations) and the print film must be "long pitch" (KS-1870 or DH-1870 perforations), and the printer guide rollers and tensions set to specification. When a print is unsteady, it's likely some stage was printed short pitch to short pitch, or the printer was misadjusted. I have seen very steady prints from the highest speed printers, and unsteady prints from very slow printers, so speed is not the key factor.

Posted by Shaun Flichel (Member # 1435) on 10-21-2002, 09:58 PM:

Trailers are acceptable for quick testing, not aligning, as I did mention, this MUST be a still section like credits, if that loop is perfectly focused accross the screen, then there no problem. Except not too many go to the outter limits of the screen. If you suspect a focus problem, the chances of a lab error ending up with perfect focus on your screen is highly unlikely. And as far as travel ghosts go, all your looking for is white ghosting into black, a coming soon clip (or date) from the end of a trailer is a good test for this. Be sure to frame the loop throughout the whole screen.