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This section explains the relationship between resolution and scan size when using the TWAIN driver or the WIA driver with the machine.
To specify the scan area or resolution on the machine you are using as a network TWAIN scanner directly, see the TWAIN driver Help.
Exposure glass
The scan size determines the maximum possible resolution.
See the table below for the maximum resolution available for each scan size.
Width (mm) |
Length (mm) |
Maximum resolution (dpi) |
|
|---|---|---|---|
maximum |
297 |
216 |
600 |
A4 |
297 |
210 |
600 |
B5 |
257 |
182 |
693 |
A5 |
210 |
148 |
848 |
B6 |
182 |
128 |
979 |
A6 |
148 |
105 |
1200 |
Letter |
279.4 |
215.9 |
600 |
51/2 × 81/2 |
215.9 |
139.7 |
825 |
Width (mm) |
Length (mm) |
Maximum resolution (dpi) |
|
|---|---|---|---|
maximum |
297 |
216 |
600 |
A4 |
297 |
210 |
602 |
B5 |
257 |
182 |
695 |
A5 |
210 |
148 |
851 |
B6 |
182 |
128 |
982 |
A6 |
148 |
105 |
1200 |
Letter |
279.4 |
215.9 |
600 |
51/2 × 81/2 |
215.9 |
139.7 |
828 |
ADF
The scan size determines the maximum possible resolution.
See the table below for the maximum resolution available for each scan size.
Width (mm) |
Length (mm) |
Maximum resolution (dpi) |
|
|---|---|---|---|
maximum |
297 |
432 |
600 |
A3 |
297 |
420 |
602 |
A4 |
210 |
297 |
851 |
A5 |
148 |
210 |
1200 |
B4 |
257 |
364 |
695 |
B5 |
182 |
257 |
982 |
B6 |
128 |
182 |
1200 |
11×17 |
279.4 |
431.4 |
600 |
Legal |
215.9 |
355.6 |
728 |
Letter |
215.9 |
279.4 |
828 |
51/2 × 81/2 |
139.7 |
215.9 |
1200 |
81/2 × 13 |
215.9 |
330.2 |
785 |
81/2 × 132/5 |
215.9 |
340.36 |
761 |
Width (mm) |
Length (mm) |
Maximum resolution (dpi) |
|
|---|---|---|---|
maximum |
297 |
432 |
600 |
A3 |
297 |
420 |
600 |
A4 |
210 |
297 |
848 |
A5 |
148 |
210 |
1200 |
B4 |
257 |
364 |
693 |
B5 |
182 |
257 |
979 |
B6 |
128 |
182 |
1200 |
11×17 |
279.4 |
431.4 |
600 |
Legal |
215.9 |
355.6 |
728 |
Letter |
215.9 |
279.4 |
825 |
51/2 × 81/2 |
139.7 |
215.9 |
1200 |
81/2 × 13 |
215.9 |
330.2 |
785 |
81/2 × 132/5 |
215.9 |
340.36 |
761 |
Width (mm) |
Length (mm) |
Maximum resolution (dpi) |
|
|---|---|---|---|
maximum |
297 |
432 |
591 |
A3 |
297 |
420 |
600 |
A4 |
210 |
297 |
848 |
A5 |
148 |
210 |
1200 |
B4 |
257 |
364 |
692 |
B5 |
182 |
257 |
979 |
B6 |
128 |
182 |
1200 |
11×17 |
279.4 |
431.4 |
600 |
Legal |
215.9 |
355.6 |
728 |
Letter |
215.9 |
279.4 |
825 |
51/2 × 81/2 |
139.7 |
215.9 |
1200 |
81/2 × 13 |
215.9 |
330.2 |
785 |
81/2 × 132/5 |
215.9 |
340.36 |
761 |
Certain original types and resolution settings can reduce scanning quality.
