Description
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The 2017 ESFR .75x version (Enhanced – Full sheet) is: 225mm x 150mm (8.86″ x 5.90″)
The 2017 ESFR .66x version (Extended – Full sheet) is: 132mm x 235mm (5.20″ x 9.25″)
The 2023 ESFR .66x version (Extended – Full sheet) is: 234.95mm x 135.72mm (9.25″ x 5.34″)
Sizes |
2017 ESFR Enhanced – Multi Dimensions |
2017 ESFR Extended – Multi Dimensions |
2023 ESFR Extended – Multi Dimensions |
Small | 190.5mm × 127mm (7.5″ × 5″) |
196.85mm × 110.73mm (7.75″ × 4.36″) |
190.5mm × 110.05mm (7.5″ × 4.33″) |
X-Small | 114.29mm × 76.2mm (4.5″ × 3″) |
127mm × 71.44mm (5″ × 2.81″) |
120.65mm × 69.7mm (4.75″ × 2.74″) |
XXX-Small | 57.15mm × 38.1mm (2.25″ × 1.5″) |
63.5mm × 35.72mm (2.5″ × 1.41″) |
63.5mm × 36.68mm (2.5″ × 1.44″) |
XX-Small | 76.2mm × 50.8mm (3″ × 2″) |
88.9mm × 50.01mm (3.5″ × 1.97″) |
88.9mm × 51.35mm (3.5″ × 2.02″) |
XXXX-Small | 38.1mm × 25.4mm (1.5″ × 1″) |
44.45mm × 25mm (1.75″ × 0.98″) |
44.45mm × 25.68mm (1.75″ × 1.01″) |
Several eSFR ISO calculations require knowledge of the image magnification, which is calculated by the Imatest eSFR ISO module when Registration mark vertical spacing (cm) is entered into the appropriate box on the right of the eSFR ISO ‘More settings’ window. (Pixel size or pitch must also be entered.) For eSFR ISO charts the Reg. mark vertical spacing is exactly 0.46 times the vertical chart dimension. For example, for the smallest eSFR Enhanced chart image, which is 38.1mm x 25.4mm (1.5″ x 1″), the Reg. mark vertical spacing is 0.46cm x 2.54cm (0.018″ x 1″) = 1.1684cm (0.07″).