Focal Length Field of View Size of Sun
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28 mm 49° x 74° 0.2 mm
35 mm 39° x 59° 0.3 mm
50 mm 27° x 40° 0.5 mm
105 mm 13° x 19° 1.0 mm
200 mm 7° x 10° 1.8 mm
400 mm 3.4° x 5.1° 3.7 mm
500 mm 2.7° x 4.1° 4.6 mm
1000 mm 1.4° x 2.1° 9.2 mm
1500 mm 0.9° x 1.4° 13.8 mm
2000 mm 0.7° x 1.0° 18.4 mm
2500 mm 0.6° x 0.8° 22.9 mm
Image Size of Sun (mm) = Focal Length (mm) / 109
Table adapted from "Total Solar Eclipse of 2006 March 29" (NASA/TP-2004-212762).
