File:Distance times fstop.jpg
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Size of this preview: 692 × 599 pixels. Other resolutions: 277 × 240 pixels | 554 × 480 pixels | 887 × 768 pixels | 1,182 × 1,024 pixels | 2,364 × 2,048 pixels | 2,722 × 2,358 pixels.
Original file (2,722 × 2,358 pixels, file size: 2.43 MB, MIME type: image/jpeg)
Summary
| Description |
English: The illuminating power of electronic photoflash devices are often measured as guide numbers, which are a composite unit of measure comprising two factors: aperture ratio and distance. Guide numbers may be expressed in either of these units of measure: f-number⋅meters or f-number⋅feet.
Camera: Nikon-Df |
| Date | |
| Source | Own work |
| Author | Greg L |
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:38, 14 August 2017 | | 2,722 × 2,358 (2.43 MB) | wikimediacommons>Greg L | Color balance more blue |
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