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2 1/4" x 3 1/4" (6x9 cm) Lens Coverage

Here's a list of lenses with the angle of view for coverage on the 2 1/4 x 3 1/4 format.  The 35mm equivalent lens is shown for reference.  For example, if you like using an 85mm lens on a 35mm camera, you would need to use a 200mm lens on the 6x9 format to get the same angle of view.

The 6x9 film gate size used for the calculations was 2.25 x 3.25 inches.  The 35mm film gate size used was 24mm x 36mm.  If your roll film holders are slightly smaller, then the chart will be slightly overstated in terms of angle of view.

The formula used to calculate the angle of view is:

2*(ATAN((fg/(2*fl))))*(180/PI)  where fg = film gate diagonal  and fl = focal length of the lens.

Focal Length mm 6x9 Angle of View 35mm Equivalent
35 110 15mm
38 106 17mm
47 94 20mm
58 82 25mm
65 75 28mm
72 70 31mm
75 68 33mm
90 58 39mm
100 53 43mm
105 51 45mm
115 47 49mm
120 45 52mm
125 44 54mm
127 43 55mm
135 41 58mm
150 37 65mm
180 31 77mm
200 28 86mm
210 27 91mm
240 24 103mm
250 23 108mm
270 21 117mm
300 19 129mm
360 16 155mm
380 15 164mm
400 14 172mm
500 11 215mm
600 10 258mm

The 400, 500, and 600mm lenses are shown for those users who have a long monorail  4x5 or larger view camera with 20" of bellows draw and are using a 6x9 roll back.  I'm not aware of any 6x9 camera that came standard with that much bellows draw.

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