The Complete Guide to Landscape Astrophotography by Mike Shaw

Author:Mike Shaw
Language: eng
Format: epub
Publisher: Routledge

12.9 The three images at the top were all collected with the same aperture and shutter speed but different ISO settings: (a) 12800, (b) 1600, and (c) 200. Each successive image thus differs from the preceding one by 3EV. An enlargement from the region including Orion’s Belt from each image is shown in (d) to (f) after compensating for the differences in exposure. Although subtle, the image made with an ISO setting of 12800 exhibits a noticeably better resolution and lower color noise in the background.

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