11.2 What are the lens focal length/image size conversions for the various filmformats?
Description
This article is from the rec.arts.movies.tech FAQ, by Scott E. Norwood snorwood@nyx.nyx.net with numerous contributions by others.
11.2 What are the lens focal length/image size conversions for the various filmformats?
11.2.1 16mm Chart
Lens | <---------- Distance in Feet From Screen to Film -----------> |
Focal | |
Length | 8' | 10' | 12' | 15' | 20' | 25' | 30' | 35' |
--------|-------|-------|-------|-------|-------|-------|-------|-------|
| 4'9" | 5'11" | 7'2" | 9'0" | 12'0" | Width of Picture |
.64" | 3'6" | 4'5" | 5'4" | 6'8" | 8'11" | Height of Picture |
--------|-------|-------|-------|-------|-------|-------|-------|-------|
| 3'11" | 4'11" | 5'11" | 7'6" | 9'11" | 12'6" | - | - |
.75" | 2'11" | 3'8" | 4'5" | 5'7" | 7'5" | 9'3" | - | - |
--------|-------|-------|-------|-------|-------|-------|-------|-------|
| 2'11" | 3'8" | 4'5" | 5'7" | 7'5" | 9'4" | 11'3" | 13'1" |
1" | 2'2" | 2'9" | 3'4" | 4'2" | 5'7" | 6'11" | 8'4" | 9'9" |
--------|-------|-------|-------|-------|-------|-------|-------|-------|
| 1'11" | 2'5" | 2'11" | 3'8" | 4'11" | 6'2" | 7'6" | 8'9" |
1.5" | 1'5" | 1'10" | 2'2" | 2'9" | 3'8" | 4'7" | 5'7" | 6'6" |
--------|-------|-------|-------|-------|-------|-------|-------|-------|
| - | 1'10" | 2'2" | 2'9" | 3'8" | 4'8" | 5'7" | 6'6" |
2" | - | 1'4" | 1'8" | 2'1" | 2'9" | 3'5" | 4'2" | 4'10" |
--------|-------|-------|-------|-------|-------|-------|-------|-------|
| - | 1'5" | 1'9" | 2'2" | 2'11" | 3'8" | 4'5" | 5'3" |
2.5" | - | 1'1" | 1'3" | 1'8" | 2'2" | 2'9" | 3'4" | 3'11" |
--------|-------|-------|-------|-------|-------|-------|-------|-------|
| - | - | - | - | - | 3'1" | 3'8" | 4'4" |
3" | - | - | - | - | - | 2'3" | 2'9" | 3'3" |
--------|-------|-------|-------|-------|-------|-------|-------|-------|
| - | - | - | - | - | 2'7" | 3'2" | 3'8" |
3.5" | - | - | - | - | - | 1'11" | 2'4" | 2'9" |
--------|-------|-------|-------|-------|-------|-------|-------|-------|
| - | - | - | - | - | 2'3" | 2'9" | 3'3" |
4" | - | - | - | - | - | 1'8" | 2'1" | 2'5" |
------------------------------------------------------------------------|
Lens | <---------- Distance in Feet From Screen to Film -----------> |
Focal | |
Length | 40' | 45' | 50' | 60' | 75' | 100' | 125' | 150' |
--------|-------|-------|-------|-------|-------|-------|-------|-------|
| 10'0" | 11'3" | 12'6" | - | - | Width of Picture |
1.5" | 7'5" | 8'4" | 9'4" | - | - | Height of Picture |
--------|-------|-------|-------|-------|-------|-------|-------|-------|
| 7'5" | 8'5" | 9'4" | 11'3" | 14'0" | 18'9" | 23'5" | 28'2" |
2" | 5'7" | 6'3" | 6'11" | 8'4" | 10'5" | 13'11"| 17'6" | 21'0" |
--------|-------|-------|-------|-------|-------|-------|-------|-------|
| 5'11" | 6'8" | 7'5" | 9'0" | 11'3" | 15'0" | 18'9" | 22'6" |
2.5" | 4'5" | 5'0" | 5'7" | 6'8" | 8'4" | 11'2" | 13'11"| 16'9" |
--------|-------|-------|-------|-------|-------|-------|-------|-------|
| 4'11" | 5'7" | 6'2" | 7'5" | 9'4" | 12'6" | 15'7" | 18'9" |
3" | 3'8" | 4'2" | 4'7" | 5'7" | 6'11" | 9'3" | 11'7" | 14'0" |
--------|-------|-------|-------|-------|-------|-------|-------|-------|
| 4'3" | 4'9" | 5'4" | 6'5" | 8'0" | 10'8" | 13'4" | 16'1" |
3.5" | 3'2" | 3'7" | 3'11" | 4'9" | 5'11" | 7'11" | 9'11" | 12'0" |
--------|-------|-------|-------|-------|-------|-------|-------|-------|
| 3'8" | 4'2" | 4'8" | 5'7" | 7'0" | 9'4" | 11'8" | 14'0" |
4" | 2'9" | 3'1" | 3'5" | 4'2" | 5'2" | 6'11" | 8'8" | 10'5" |
------------------------------------------------------------------------|
Continue to:
My Books
