File:2021-03-30 Hand-crank operated generator (dynamo torch) plus backup.jpg

Summary[edit]

Camera location	51° 28′ 40.8″ N, 7° 33′ 18″ E	View this and other nearby images on: OpenStreetMap	51.478000; 7.555000

NOTE: This image is a focus stacked image of "Hand-crank operated generator (dynamo torch) plus backup - high resolution" consisting of 13 images that were merged using Zerene Stacker Version 1.04 Build T2021-02-16-2045 (licensed). As a result, this image underwent digital manipulation which may have included blending, blurring, cloning, and colour and perspective adjustments. As a result of these adjustments, the image content may be slightly different than reality at the points where the images were combined. This manipulation is often required due to lens, perspective, and parallax distortions. العربية ∙ Deutsch ∙ English ∙ español ∙ français ∙ 日本語 ∙ македонски ∙ português do Brasil ∙ русский ∙ slovenščina ∙ ไทย ∙ українська ∙ 中文（简体） ∙ 中文（繁體） ∙ +/−

Additional Information[edit]

en: A hand-crank operated generator.

• Manufactured for use as a dynamo torch
• Depicted side by side with an almost identical backup model.
• This focus stack is a composition of 13 individual images
• Image taken in March 2021 in Aplerbeck, Dortmund, Germany.

See below for technical details concerning the "making of" this image.

de: Ein handbetriebener Generator.

• Nutzung als Dynamotaschenlampe.
• Zusammen mit einem fast identischen Backup-Exemplar abgebildet.
• Diese hoch aufgelöste Focus Stacking-Aufnahme ist aus 13 Einzelbilder zusammen gesetzt.
• Aufgenommen in Februar 2021 in Aplerbeck, Dortmund, Deutschland.

Technische Daten zum Bild: siehe nachfolgende Beschreibung im englischer Sprache.

Technical Details / Making of this Image[edit]

• Focus stacked image.
• [1] Camera: Sony Alpha 7RIV, 61 Mpixels, sensor size 9904x6336.
• [2] Lens: Sony FE 90mm F2.8 Macro G OSS.
• [3] Scope: 13 images, magnification ratio 1:6.5 (0.154x).
• [4] Camera / lens settings: manual mode, electronic shutter, ISO 100, 1/25s, aperture 9.0, bias (=exposure compensation) 0.00, WB (white balance) 5600K, colour space 'Adobe RGB'.
• [5] FOCUS STACK recording: camera attached to focusing rack, rotated lens circumference by 0.33 mm between images, total focus span covered after rotating lens by 4.0 mm: approx 180 mm (from nearmost focus to the most distant focus spot), self timer 5s, images stored both as JPG and 16-bit 'ProPhoto-RGB' RAW (.ARW).
• [6] Adobe Lightroom: (a) Preset 004 (Presence+Sharp+NoiseRed) (b)-(d) no further enhancements (e) exported as TIFF/16bit, retaining 'ProPhoto-RGB' colour profile.
• [7] FOCUS STACK processing: (a) tool 'Zerene Stacker' 1.04 (b) stacked all 13 JPG images via 'PMax' method (c) no retouching required (d) exported as one TIFF/16bit 'ProPhoto-RGB' image.
• [8] Adobe Photoshop: (a) imported stacked TIFF/16bit image, explicitly preserving embedded colour space 'ProPhoto-RGB' (b) masked camera outlines (c1) enhanced contrast of camera via masked tone curve adjustment layer (c2) reduced background to pure white via tone curve adjustment layer with inverted mask (d) removed larger dust specks and strands of hair (e) enhanced sharpness:NO (f) cropped:NO (g) exported as JPG max. quality file with embedded 'sRGB' colour profile.
• [9] Dimensions: Width of image approx. 230 mm, length of right torch: 133 mm.
• [10] Wiki Commons categorisation: 'Category:Dynamo torches

Links[edit]

• Wikipedia en: Mechanically powered flashlight
• Wikipedia de: Dynamotaschenlampe
• Commons: Category:Dynamo torches

Licensing[edit]

I, the copyright holder of this work, hereby publish it under the following license:

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