Astro Max Calculator
Max Shutter Speed Calculator
Free · Designed for iPad. Not verified for macOS.
*Updated*
Astrophotographers often use the "500 Rule" as a way to estimate the maximum shutter speed that can be used to capture the night sky before star trailing becomes noticeable. Here is a simple calculator, in night vision friendly red (or daytime color mode), to find recommended maximum shutter speeds based on your lens focal length and digital camera sensor's crop ratio.
The 500 Rule is just a starting point for night sky astrophotography. You can try selecting a more conservative rule in the app (400, 300, etc.) for better focused shots. As always, experiment and find out what works best with your setup!
Developer Note: This is my first App Store release. Please let me know how this app works for you, how it doesn't, or what you would like to see in further updates. Thanks!
Ratings & Reviews
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- Added a Day Mode color scheme.
- Fixed a bug so that the lens focal length will update if it exceeds a new selected upper limit.
- Slight updates to the user interface.
- Added crop factor information for Micro 4/3 cameras.
The developer, Gregory Wu, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Gregory Wu
- Size
- 392.2 KB
- Category
- Photo & Video
- Compatibility
Requires iOS 14.1 or later.
- iPhone
Requires iOS 14.1 or later. - iPad
Requires iPadOS 14.1 or later. - iPod touch
Requires iOS 14.1 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2021 Gregory Wu