File:RulerEdge.jpg
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![File:RulerEdge.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/c/ca/RulerEdge.jpg/800px-RulerEdge.jpg?20100930220230)
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DescriptionRulerEdge.jpg |
English: Non-cropped (but JPEG-downscaled) macro photo of an edge of a plastic ruler with millimeter scale, created with a macro lens Tamron SP AF 90 mm F/2.8 Di MACRO 1:1 and a wide angle lens smc Pentax-M 28 mm F/2.8 mounted in "reverse position". This combination (see photo links below) allows a magnification of 3.2:1 – but only with a tiny depth of field at a working distance of approx 4 cm. The shading of the corners is probably due to the fact that the reversed lens had a smaller filter diameter (49 mm) than the camera-mounted lens (55 mm). With an aperture of f3.5 in the macro and f22 in the reversed lens, the vignetting was the lowest (and the depth of field was the best; as shown here).
Deutsch: Unbeschnittenes (nicht "gecropptes") Makrofoto der Kante eines Plastiklineals mit Millimetereinteilung, erstellt mit einem Makroobjektiv Tamron SP AF 90 mm F/2,8 Di MACRO 1:1 sowie einem Weitwinkelobjektiv smc Pentax-M 28 mm / 1:2,8 in "Retrostellung". Diese Kombination (siehe auch Fotolinks unten) ermöglicht zwar einen Abbildungsmaßstab von ca. 3,2:1, allerdings bei einer winzigen Schärfeebene in einem Arbeitsabstand von lediglich ca. 4 cm. Die Abschattung der Bildecken kommt wohl dadurch zustande, dass das Retroobjektiv einen kleineren Filterdurchmesser hatte (49 mm) als das kameraseitige Objektiv (55 mm). Bei einer Blende von f3,5 des Makros und f22 des Retroobjektivs war diese Vignettierung am geringsten (und die Schärfentiefe am größten; wie hier gezeigt). |
Date | |
Source | Own work |
Author | Christian Fischer |
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This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
Attribution: Christian Fischer
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:02, 30 September 2010 | ![]() | 4,672 × 3,104 (1.78 MB) | Fice (talk | contribs) | {{Information| |Description= '''''English:''''' Non-cropped macro photo of an edge of a plastic ruler with millimeter scale, created with a macro lens Tamron SP AF 90 mm F/2.8 Di MACRO 1:1 and a wide angle lens smc Pentax-M 28 mm F/2.8 mounted in "reverse |
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This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | PENTAX |
---|---|
Camera model | PENTAX K-7 |
Author | Christian Fischer |
Copyright holder | See added licence |
Exposure time | 13/10 sec (1.3) |
F-number | f/3.5 |
ISO speed rating | 100 |
Date and time of data generation | 22:55, 30 September 2010 |
Lens focal length | 90 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | K-7 Ver 1.10 |
File change date and time | 22:55, 30 September 2010 |
Y and C positioning | Co-sited |
Exposure Program | Aperture priority |
Exif version | 2.21 |
Date and time of digitizing | 22:55, 30 September 2010 |
APEX exposure bias | 0 |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Color space | sRGB |
Sensing method | One-chip color area sensor |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Focal length in 35 mm film | 135 mm |
Scene capture type | Standard |
Contrast | Hard |
Saturation | Normal |
Sharpness | Hard |
Subject distance range | Macro |
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