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Calculator for DSLR Astrophotography

Page Contents

1.   DSLR Calculator for Astrophotography

2.   Details for Popular DSLR's

3.   Messier Table

Orion Telescopes..Superb Optics at a Great Price!!

 

I provided the DSLR calculator below to help you decide on a good match between various telescopes & digital SLR cameras. It should be a helpful tool for determining the area of sky that will be framed using particular DSLR/telescope combinations. Also, I added a magnification calculator. This will provide the approximate magnification of an object with your DSLR and telescope at prime focus. It is based on your sensor width and height as well as telecope focal length.

For detailed instructions and concept, see article posted on AstroPhotography Tonight: DSLR Astrophotography Calculator.

See My Digital SLR Astrophotography Tutorial!

Digital SLR Astrophotography Tutorial

 

DSLR Calculator for Astrophotography

Details for Popular

DSLR's

Enter Camera & Telescope Details:

DSLR Sensor Width (mm):

DSLR Sensor Height (mm):

DSLR Max.Resolution- Width (pixels):

Telescope Focal Length (mm):



Results:

Arc Min of Sky- Width:

Arc Min of Sky- Height:

Arc Seconds/Pixel:



Magnification (X):



DSLR

Sensor Width (mm)

Sensor Height 

(mm)

Maximum Resolution- Width (Pixels)

Canon

5D

36.0

24.0

4368

10D

22.7

15.1

3072

20D

22.5

15.0

3504

20DA

22.5

15.0

3504

40D

22.2

14.8

3888

50D

22.3

14.9

4752

300D

22.7

15.1

3072

350D

22.2

14.8

3456

450D

22.2

14.8

4272

1000D

22.2

14.8

3888

Nikon

D2x

23.7

15.7

4288

D3

36

24

4256

D40

23.7

15.5

3008

D40x

23.7

15.6

3872

D70

23.7

15.5

3008

D80

23.6

15.8

3872

D90

23.6

15.8

4288

D200

23.6

15.8

3872

D300

23.6

15.8

4288

 

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.

 

Messier Object

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)

1

6 x 4

23

27.0

45

110.0

67

30.0

89

4.0

2

12.9

24

5.0

46

27.0

68

12.0

90

9.5 x 4.5

3

16.2

25

40.0

47

30.0

69

7.1

91

5.4 x 4.4

4

26.3

26

15.0

48

54.0

70

7.8

92

11.2

5

17.4

27

8.0 x 5.7

49

9 x 7.5

71

7.2

93

22.0

6

15.0

28

11.2

50

16.0

72

5.9

94

7 x 3

7

80.0

29

7.0

51

11 x 7

73

2.8

95

4.4 x 3.3

8

60 x 35

30

11.0

52

13.0

74

10.2 x 9.5

96

6 x 4

9

9.3

31

178

53

12.6

75

6.0

97

3.4 x 3.3

10

15.1

32

8 x 6

54

9.1

76

2.7 x 1.8

98

9.5 x 3.2

11

14.0

33

73 x 45

55

19.0

77

7 x 6

99

5.4 x 4.8

12

14.5

34

35.0

56

7.1

78

8 x 6

100

7 x 6

13

16.6

35

28.0

57

1.4 x 1.0

79

8.7

101

22.0

14

11.7

36

12.0

58

5.5 x 4.5

80

8.9

102

5.2 x 2.3

15

12.3

37

24.0

59

5 x 3.5

81

21 x 10

103

6.0

16

7.0

38

21.0

60

7 x 6

82

9 x 4

104

9 x 4

17

11.0

39

32.0

61

6 x 5.5

83

11 x 10

105

2.0

18

9.0

40

0.8

62

14.1

84

5.0

106

19 x 8

19

13.5

41

38.0

63

10 x 6

85

7.1 x 5.2

107

10.0

20

28.0

42

85 x 60

64

9.3 x 5.4

86

7.5 x 5.5

108

8 x 1

21

13.0

43

20 x 15

65

8 x 1.5

87

7.0

109

7 x 4

22

24.0

44

95.0

66

8 x 2.5

88

7 x 4

110

17 x 10

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