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http://forums.dpreview.com/forums/readflat.asp?forum=1033&message=22784001
4:3 = 18.5mm on 1.5x; i.e. 27.75mm on FF/35mm
3:2 = 17.5mm on 1.5x; i.e. 26.25mm on FF/35mm
16:9 = 17mm on 1.5x; i.e. 25.5mm on FF/35mm
mit 26,25mm bis 280mm deckt die TZ3 mehr ab als eine DLSR mit einem UNiversalzoom 18-200 von Tamron oder Sigma bei einem Gewicht von ca. 250g!
Green: Relates to 4:3 aspect ratio for all cameras.
Blue: Relates to 16:9 aspect ratio for cameras without "all 28mm" feature.
Pink: Relates to 16:9 aspect ratio for TZ3.
Diagram #1: Assumes a given width "x" in 4:3 in another camera (and all subsequent calculations are relative to this width of "x"). Consequently, the height is 3/4 "x" @ 4:3, and cropped to 9/16 "x" @ 16:9. The width remains the same in both aspect ratio's. The triangle shows how the radius (5/8 "x") was calculated using the Pythagorean theorem.
Diagram #2: Illustrates the TZ3 @ 16:9. The radius remains unchanged (5/8 "x"), which provides the diagonal length of the triangle. Again, using Pythagorus, and the fact that the two sides of the triangle are proportioned at a 16:9 ratio, we can calculate the length of the two sides, shown as a fraction of 8. By doubling these figures, we can calculate the full width and height of the rectangular viewing area.
Diagram #3: Shows the other camera, with the figures shown in decimal point notation.
Diagram #4: Shows the TZ3, with the figures shown in decimal point notation.
By comparing the 16:9 figures in diagram #3 with the 16:9 figures in diagram #4, we see that the resultant TZ3 image is 1.09/1.0 = 109% as wide as the other camera, or 9% wider. We also see that the resultant TZ3 image is 0.61/0.56 = 109% as high as the other camera, or 9% higher.
What does this translate to in terms of effectual focal length in 35mm equivalent terms? That I do not know. Some have calculated it to be 25.7mm. All I know is that by adding this feature, Panasonic is giving us a 9% wider and 9% higher view @ 16:9 than what we'd be seeing if they had NOT added the feature. Kudos to Panasonic.
http://forums.dpreview.com/forums/readflat.asp?forum=1033&message=22784001
4:3 = 18.5mm on 1.5x; i.e. 27.75mm on FF/35mm
3:2 = 17.5mm on 1.5x; i.e. 26.25mm on FF/35mm
16:9 = 17mm on 1.5x; i.e. 25.5mm on FF/35mm
mit 26,25mm bis 280mm deckt die TZ3 mehr ab als eine DLSR mit einem UNiversalzoom 18-200 von Tamron oder Sigma bei einem Gewicht von ca. 250g!
Green: Relates to 4:3 aspect ratio for all cameras.
Blue: Relates to 16:9 aspect ratio for cameras without "all 28mm" feature.
Pink: Relates to 16:9 aspect ratio for TZ3.
Diagram #1: Assumes a given width "x" in 4:3 in another camera (and all subsequent calculations are relative to this width of "x"). Consequently, the height is 3/4 "x" @ 4:3, and cropped to 9/16 "x" @ 16:9. The width remains the same in both aspect ratio's. The triangle shows how the radius (5/8 "x") was calculated using the Pythagorean theorem.
Diagram #2: Illustrates the TZ3 @ 16:9. The radius remains unchanged (5/8 "x"), which provides the diagonal length of the triangle. Again, using Pythagorus, and the fact that the two sides of the triangle are proportioned at a 16:9 ratio, we can calculate the length of the two sides, shown as a fraction of 8. By doubling these figures, we can calculate the full width and height of the rectangular viewing area.
Diagram #3: Shows the other camera, with the figures shown in decimal point notation.
Diagram #4: Shows the TZ3, with the figures shown in decimal point notation.
By comparing the 16:9 figures in diagram #3 with the 16:9 figures in diagram #4, we see that the resultant TZ3 image is 1.09/1.0 = 109% as wide as the other camera, or 9% wider. We also see that the resultant TZ3 image is 0.61/0.56 = 109% as high as the other camera, or 9% higher.
What does this translate to in terms of effectual focal length in 35mm equivalent terms? That I do not know. Some have calculated it to be 25.7mm. All I know is that by adding this feature, Panasonic is giving us a 9% wider and 9% higher view @ 16:9 than what we'd be seeing if they had NOT added the feature. Kudos to Panasonic.
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