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File:Distance times fstop.jpg

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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
Saved file type: 14-bit RAW
Lens: Micro-NIKKOR 55mm f/3.5 macro
Filter: B+W 52mm HTC Kaesemann Circular Polarizer
Scene illuminance: EV 9 (1280 lux)
Aperture: f/22
Shutter: 2 seconds
Sensitivity: ISO 200
Distance (mid): 7 inches
Lighting: Natural indirect plus LED photoflood with diffuser
Avg. diametric crop from original: 63%
Date
Source Own work
Author Greg L

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4 August 2017

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Date/TimeThumbnailDimensionsUserComment
current01:38, 14 August 2017Thumbnail for version as of 01:38, 14 August 20172,722 × 2,358 (2.43 MB)Greg LColor balance more blue
04:00, 9 August 2017Thumbnail for version as of 04:00, 9 August 20172,722 × 2,358 (2.18 MB)Greg LBrightened
03:48, 5 August 2017Thumbnail for version as of 03:48, 5 August 20172,722 × 2,358 (2.27 MB)Greg LCleaned up better
21:14, 4 August 2017Thumbnail for version as of 21:14, 4 August 20172,722 × 2,358 (2.3 MB)Greg LLightness curve adjusted
19:22, 4 August 2017Thumbnail for version as of 19:22, 4 August 20172,722 × 2,358 (3.82 MB)Greg LUser created page with UploadWizard

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