my profile | my password | search | faq & rules | forum home

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Screen size dilemma...

Author Topic: Screen size dilemma... John Wilson Film God Posts: 5438 From: Sydney, Australia. Registered: Dec 1999 posted 06-15-2000 04:27 AM                     OK, so we've got scope and flat. Our scope is the correct ratio, however, our flat lens is too small so we crop top and bottom a tad. Question: Given the choice, would you go 5mm larger on the flat lens to bring the ratios into line thus having a slightly smaller flat picture, or would you lift the masking up a bit (we can, there's screen behind it) and set it to the larger lens size for flat and go 5mm smaller on scope even if it then meant you'd be cropping a little on the sides. (We can't move sides out any further). Your opinions please...  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 06-15-2000 06:48 AM                        I'd keep scope as it is, and show the full 2.39:1 aspect ratio "wall-to-wall". Ideally match the image height for both 2.39:1 and 1.85:1 (fixed top and bottom masking, adjustable side masking). If you insist on having a higher 1.85:1 image, err on the side of a longer lens and less magnification. In any case, show the full aspect ratio, and don't crop the image. Use the SMPTE 35-PA (RP40) test film to verify projected image area. ------------------ John P. Pytlak, Senior Technical Specialist Worldwide Technical Services, Entertainment Imaging Eastman Kodak Company Research Labs, Building 69, Room 7419 Rochester, New York, 14650-1922 USA Tel: 716-477-5325 Fax: 716-722-7243 E-Mail: john.pytlak@kodak.com  |  IP: Logged John Walsh Film God Posts: 2490 From: Connecticut, USA, Earth, Milky Way Registered: Oct 1999 posted 06-15-2000 08:11 AM                     I'd think I would (also) leave 'scope alone, and get a longer focal length lens for flat. If I understand the your setup, that would mean that both formats are as large as they can be with no cropping. When I set up screen sizes and lenses, I usually try to favor flat if a choice must be made. It's the format that has to work the "hardest."  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 06-15-2000 11:57 AM                     I would seriuosly consider getting a Schneider Variable Prime lens for this application, especially if you fall inbetween two focal lengths. They are really excellent quality and will allow you to set the exact focal length you need. I wonder if you are cropping your scope picture too? Have you looked at RP-40 to see where things are at? You can also download the Schneider lens calculator from the Schneider web site in the links section of this site. They just released a new version a few days ago. It may help you out alot. Mark@ GTS  |  IP: Logged Kevin Crawford Expert Film Handler Posts: 207 From: Sacramento, CA, USA Registered: May 2000 posted 06-16-2000 01:55 AM                     Mark does the new Schnieder program account for the Variable Prime lens?  |  IP: Logged John Wilson Film God Posts: 5438 From: Sydney, Australia. Registered: Dec 1999 posted 06-16-2000 04:12 AM                     Mission accomplished. I put in the larger lens and filed the flat plate to the correct ratio, so now all our screens are screening the correct ratios. (this was the only one which didn't and it was becoming annoying) Thanks for your inputs. John  |  IP: Logged

All times are Central (GMT -6:00)

Printer-friendly view of this topic

Hop To: Select a Forum: Category: Operations -------------------- Digital Cinema Forum Film Handlers' Forum Large Format Forum Ground Level Feature Info, Trailer Attachments & REAL Credit Offsets Category: Community -------------------- Film-Yak Film Handlers' Movie Reviews The Afterlife Bob Maar's Joke-A-Thon Category: Classified -------------------- Equipment and Supplies Wanted/For Sale Help Wanted/Seeking Employment Category: System -------------------- Software Beta Testing Forum

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.