Specifications for Alpa Surgical 81 
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| Made in | Suisse from Circa 1972 to (After) 1974 | ||
| Frequency on French flea markets/yard sales: | Rare | ||
| Inventory #: | 5026 | ||
| Maker (if different from the brand): | |||
| Brand’s known addresses: | Ballaigues Suisse |
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| Mc Keown's page: | 48 (12th Edition) | ||
| Competitors: | |||
| Camera Type : | Spécial | ||
| Sensor | |||
| Image sensor: | Size (mm) : | ||
| Megapixels: | Image size (max) : | ||
| Film / plate / Sheet film and other | |||
| Film type: | 35 mm (L'échelle est donnée par une pièce de 5 centimes.) |
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| Maximum number of exposures: | 36 | ||
| Frame format (metric): | 24 x 36 mm | Frame format (imperial): | |
| Dimension of the dual-format frames (metric): | of the triple-format frames (metric): | ||
| Interchangeable back: | No | Magazine back: | No |
| Advance system: | Levier | Position : | Sur le capot |
| Rewind system: | Molette/Clé | Position : | Sur le capot |
| Rewind system options: | |||
| Video | Non | ||
| Exposure control | |||
| Meter: | Meter location: | ||
| Metering: | Metering mode: | ||
| IL/EV: | Exposure lock: | ||
| Film sensitivity: | 3 à 6400 ASA | ||
| Shutter | |||
| Shutter brand: | (Visit List of shutters) |
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| Shutter model: | (id 0) | ||
| Shutter type: | |||
| Shutter composition: | |||
| Shutter cocking: | |||
| Shutter speeds: | |||
| Shutter release: | |||
| Double exposure prevention: | |||
| Timer: | |||
| Timer signal: | |||
| Timer duration: | |||
| Lens | |||
| Original lens type: | Standard | ||
| Lens mount: | Interchangeable | ||
| Lens brand: | Kern | ||
| Lens model: | Macro Switar | ||
| Mount: | |||
| Diaphragme: | |||
| Optical formula: | Original lenght: | 50 mm | |
| Maximum aperture: | 1,9 | Minimum aperture: | |
| Minimal focusing (metric): | Minimal focusing (imperial): | ||
| Focusing mode: | Focusing control system: | ||
| Focusing memorization: | |||
| Power alimentation | |||
| Original battery model: | (- Non) | Original number of batteries: | |
| Remplacement battery type: | Number of replacement batteries: | ||
| Exposure | |||
| Exposure counter: | Exposure counter reseting: | ||
| Bellows | |||
| Bellow extension: | |||
| Bellow shape: | Bellow color: | ||
| Bellow material: | Bellow corners: | ||
| Bellow position: | Bellow edges: | ||
| Bellow attachement: | Cadre du soufflet: | ||
| Support intermédiaire du soufflet: | |||
| Min. extension: | Max. extension: | ||
| Vertical shift: | Horizontal shift: | ||
| Vertical tilt: | Horizontal tilt: | ||
| Viewfinder | |||
| Number of viewfinder: | |||
| Viewfinder type: | Second viewfinder type: | ||
| Bright-frame finder: | Parallaxe: | ||
| Rangefinder image shape: | Rangefinder image color: | ||
| Rangefinder image type: | Technique d'affichage dans le viseur: | ||
| Exposure parameters display; | Exposure parameters and auto modes display: | ||
| Flash charging signal: | Frame counter: | ||
| Over/under exposure signal: | Focusing points | ||
| Monitor | |||
| Size (inch) | Dots : | ||
| Accessory shoe | |||
| Accessory shoe: | Shoe location: | ||
| Shoe parallax correction pin: | Hot shoe: | ||
| Number of accessory shoes: | 0 | ||
| Flash | |||
| Flash sync: | M et X | Flash sync speed: | |
| Number of connections: | 2 | ||
| Built-in flash: | Non | Type of built-in flash: | |
| Flash options: | Guide Number (GN): | N/A | |
| Anti-red eye option: | Anti-red-eye mode: | ||
| Dimensions and weight | |||
| Minimum dimensions (collapsed): | cm | Weight: | 360 g |
| Maximum dimensions (extended): | cm | ||
| Miscellaneous | |||
| Depth of field preview: | Manual mirror lock-up: | ||
| Miscellaneous: | |||
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