Article · National Parks at Night
NPF: The New Rule for Shooting the Sharpest Stars in the Sky
By Tim Cooper
- Type
- Article
- Level
- Intermediate
- Price
- Free
- Published
- 2019
About this lesson
Compares the 500 rule with the NPF rule and shows how pixel pitch, aperture and focal length change the longest star-sharp exposure. Includes worked examples and calculator use.
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