Tom Glander Media

Category: Astrophotography

  • Exposure Settings for Common Astro Subjects

    Exposure Settings for Common Astro Subjects

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    Tom
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    If tracking is used, then shutter speeds can be 4 to 5 minutes long. People can be frozen if lighting is briefly used on them with longer shutter speeds. (Note that the A7R5 has an amazing sensor that is very night friendly. The ISO can probably be run even lower than shown above in many…

  • Star Trails – First Attempt

    Star Trails – First Attempt

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    Tom
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    The following is my first ever star trails photo. This was from a sequence of 230 shots, each 10 seconds long. ISO was 200. Used the Sigma 14mm. A reference image was created in Lightroom, then the remaining images synchronized to the reference. All images were then exported into a folder for processing into star…

  • How To Choose The Best Exposure Settings For Astrophotography

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    Tom
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    This is an exercise. Tip: Repeat this excercise with the same lens and different apertures, different lenses, or locations with different sky brightness. This will provide a solid basis for educated decisions on “best” exposure settings for each lens in different situations. NOTE: This seems to be overkill with the Sony. The exposure is almost…

  • Maximum Shutter Speeds Based on Rule of 300

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    Tom
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    Camera sensors have vastly improved since the “old days” of the Rule of 500. This was an early attempt to estimate the longest shutter speed for a specific focal length lens. You divide the number 500 by the focal length, and that’s your max shutter speed. For example 500 divided by a lens length of…

  • Celestial Coordinates

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    Tom
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    Recall that latitude and longitude are the coordinates used to locate objects on earth’s surface. Any point on earth can be identified by these coordinates. Astronomers use a similar system to map the sky, as follows: Declination and right ascension are the astronomical equivalents of latitude and longitude. Dec (Declination) = Latitude RA (right ascension)…

  • Shooting Stars

    Shooting Stars

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    Tom
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    Tamron 50-400mm lens, f/4.5-6.3. Below was at 50mm. So far, shooting at 400mm is providing too much wobly in the stars. More testing needed. The red dots are a plane passing overhead. It was painful to get to this point, because I had left the camera on Auto Focus mode. Of course it couldn’t focus…

  • Milky Way Photography

    Milky Way Photography

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    Tom
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    To capture the Milky Way or other star-studded field, set up the A7R5 as follows: