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Image: ExTubeMacro

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Original image ‎(946 × 484 pixels, file size: 184 KB, MIME type: image/png)

Description: Close - up photography using extension tube. 1 - Camera lens. 2 - Extension tube. 3 - Film or sensor. y - Object height. y'- Image height. l - Width of extension tube. H - First principal plane. H'- Second principal plane. e - Distance between principal planes. s - Object distance. s'- Image distance. ß - Magnification. f'ob. - Camera lens focal lenght Δ = Object - image distance. Example: f'ob. = 50 mm ; y = 33 mm ; y'= 24 mm ; ß = ? ; l = ? ß = y' / y = 24 / 33 = 0.727 l = ß . f'ob. = 0.727 . 50 = 36.35mm
Title: ExTubeMacro
Credit: Own work
Author: Tamasflex
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0
Attribution Required?: Yes

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