The .75x version (Enhanced – Full sheet) is: 150mm x 225mm (5.90″ x 8.86″)
The .66x version (Extended – Full sheet) is: 132mm x 235mm (5.20″ x 9.25″)
Sizes | Enhanced – Multi Dimensions | Extended – Multi Dimensions |
---|---|---|
Small | 190.5mm × 127mm
(7.5″ × 5″) |
196.85mm × 110.74mm
(7.75″ × 4.36″) |
X-Small | 114.3mm × 76.2mm
(4.5″ × 3″) |
127mm × 71.37mm
(5″ × 2.81″) |
XX-Small | 76.2mm × 50.8mm
(3″ × 2″) |
88.9 mm × 50mm
(3.5″ × 1.97″) |
)XXX-Small | 57.15mm × 38.1mm
(2.25″ × 1.5″) |
63.75mm × 35.81mm
(2.5″ × 1.41″) |
XXXX-Small | 38.1mm × 25.4mm
(1.5″ × 1″) |
44.45mm × 24.89mm
(1.75″ × 0.98″) |
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″).