Calculator for DSLR Astrophotography
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I provided the DSLR calculator below to help you decide on a good match between various telescopes & cameras. It should be a helpful tool for determining the area of sky that will be framed using particular camera/telescope combinations. As this is in the beta trial stage, your feedback would be well appreciated! Please feel free to email me with any questions or comments. Thanks, Ray Shore |
See My Digital SLR Astrophotography Tutorial!
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DSLR's |
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Compare the results above with the objects listed in the Messier table below to see how well the camera/telescope combination will sufficiently frame the object. |
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Angular Size (arc min) |
Messier Object |
Angular Size (arc min) |
Messier Object |
Angular Size (arc min) |
Messier Object |
Angular Size (arc min) |
Messier Object |
Angular Size (arc min) |
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1 |
6 x 4 |
23 |
27.0 |
45 |
110.0 |
67 |
30.0 |
89 |
4.0 |
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2 |
12.9 |
24 |
5.0 |
46 |
27.0 |
68 |
12.0 |
90 |
9.5 x 4.5 |
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3 |
16.2 |
25 |
40.0 |
47 |
30.0 |
69 |
7.1 |
91 |
5.4 x 4.4 |
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4 |
26.3 |
26 |
15.0 |
48 |
54.0 |
70 |
7.8 |
92 |
11.2 |
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5 |
17.4 |
27 |
8.0 x 5.7 |
49 |
9 x 7.5 |
71 |
7.2 |
93 |
22.0 |
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6 |
15.0 |
28 |
11.2 |
50 |
16.0 |
72 |
5.9 |
94 |
7 x 3 |
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7 |
80.0 |
29 |
7.0 |
51 |
11 x 7 |
73 |
2.8 |
95 |
4.4 x 3.3 |
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8 |
60 x 35 |
30 |
11.0 |
52 |
13.0 |
74 |
10.2 x 9.5 |
96 |
6 x 4 |
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9 |
9.3 |
31 |
178 |
53 |
12.6 |
75 |
6.0 |
97 |
3.4 x 3.3 |
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10 |
15.1 |
32 |
8 x 6 |
54 |
9.1 |
76 |
2.7 x 1.8 |
98 |
9.5 x 3.2 |
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11 |
14.0 |
33 |
73 x 45 |
55 |
19.0 |
77 |
7 x 6 |
99 |
5.4 x 4.8 |
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12 |
14.5 |
34 |
35.0 |
56 |
7.1 |
78 |
8 x 6 |
100 |
7 x 6 |
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13 |
16.6 |
35 |
28.0 |
57 |
1.4 x 1.0 |
79 |
8.7 |
101 |
22.0 |
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14 |
11.7 |
36 |
12.0 |
58 |
5.5 x 4.5 |
80 |
8.9 |
102 |
5.2 x 2.3 |
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15 |
12.3 |
37 |
24.0 |
59 |
5 x 3.5 |
81 |
21 x 10 |
103 |
6.0 |
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16 |
7.0 |
38 |
21.0 |
60 |
7 x 6 |
82 |
9 x 4 |
104 |
9 x 4 |
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17 |
11.0 |
39 |
32.0 |
61 |
6 x 5.5 |
83 |
11 x 10 |
105 |
2.0 |
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18 |
9.0 |
40 |
0.8 |
62 |
14.1 |
84 |
5.0 |
106 |
19 x 8 |
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19 |
13.5 |
41 |
38.0 |
63 |
10 x 6 |
85 |
7.1 x 5.2 |
107 |
10.0 |
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20 |
28.0 |
42 |
85 x 60 |
64 |
9.3 x 5.4 |
86 |
7.5 x 5.5 |
108 |
8 x 1 |
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21 |
13.0 |
43 |
20 x 15 |
65 |
8 x 1.5 |
87 |
7.0 |
109 |
7 x 4 |
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22 |
24.0 |
44 |
95.0 |
66 |
8 x 2.5 |
88 |
7 x 4 |
110 |
17 x 10 |
