Hat method
The hat method is an exposure technique in photography .
Procedure
The hat method is used for long exposure photos . The lens of the camera is covered with an easily removable cover, a dark cardboard box or an opaque hat that gives the method its name. The long exposure is started, and only after a certain time, when the camera is safely motionless, is the cover removed for the desired time of exposure. The lens is covered again before the long exposure is ended. The benefit of the method is to avoid blurring in such photographs. Since this blurring, for example in night shots, is often caused by vibrations inside the camera (for example, when the oscillating mirror is folded down on single-lens reflex cameras), the hat method is used for cameras that do not offer mirror lock-up. The hat method also circumvents blurring caused by shaking the camera while the shutter button is pressed.
application areas
The hat method is mainly used in astrophotography to image planets and other celestial bodies, which require longer exposure times, without blurring; it can also be used in the photography of solar eclipses . The method is also used when photographing fireworks and thunderstorms .
literature
- Bernd Koch: Handbook of Astrophotography . Springer-Verlag, 2013, ISBN 978-3-642-78409-5 , p. 24, 40 ( limited preview in Google Book search).
- Christian Haasz, Vilma Niclas, Michael Risch, Martin Rietze: Photo School . Image design and recording techniques for digital photographers. 3rd updated and revised edition. Franzis-Verlag, Poing 2011, ISBN 978-3-645-60116-0 , p. 240 .
Individual evidence
- ^ Matthias Kiel: Technology of astrophotography. (No longer available online.) Wilhelm Foerster Observatory Berlin, 2001, archived from the original on August 15, 2016 ; accessed on July 13, 2016 .
- ↑ a b Jan Dams: This is how the perfect photo of the New Year's Eve fireworks works. Die Welt, December 30, 2014, accessed July 13, 2016 .
- ↑ Solar eclipses. astrofotografie.org, accessed July 13, 2016 .