File:JohnWall.jpg
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Summary
[edit]DescriptionJohnWall.jpg |
English: John Wall - retired design engineer
Inventor of the Crayford focuser. ATM, optical research , painting, making things. Writing articles. Inventor of the Zerochromat retrofocally corrected refractor, discoverer of a new refractor concept, the Hypochromat. |
Date | |
Source | Own work / At my request was donated by Mr John Wall (wallporritt(at)madasafish.com) to Wikipedia. |
Author | Tamasflex / John Wall |
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 12:10, 23 May 2010 | 1,704 × 2,272 (448 KB) | Tamasflex (talk | contribs) | {{Information |Description={{en|1=ohn Wall. Retired design engineer Inventor of the Crayford focuser. ATM, optical research , painting, making things. Writing articles. Inventor of the Zerochromat retrofocally corrected refractor, discoverer of a new |
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Metadata
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Camera manufacturer | NIKON |
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Camera model | E4300 |
Exposure time | 2/221 sec (0.0090497737556561) |
F-number | f/4.5 |
ISO speed rating | 100 |
Date and time of data generation | 07:56, 8 July 2008 |
Lens focal length | 19.5 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | E4300v1.5 |
File change date and time | 07:56, 8 July 2008 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 07:56, 8 July 2008 |
Image compression mode | 1 |
APEX exposure bias | 0 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, auto mode |
Color space | sRGB |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 0 |
Focal length in 35 mm film | 92 mm |
Scene capture type | Standard |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |