Alexander Knöll

@KnoellPhotography

www.alexanderknoell.com // www.alexanderKnoell.tumblr.com
Bar Chair Modern Yellow Seat Architecture Indoors  Travel
Churro Food Food And Drink Close-up Sweet Food Fat Yummy Ready-to-eat Day Market SPAIN Travel Hipfood Foodtruck Foodtruckfestival Foodtravel Fried Fast Food Freshness No People Fingerfood Sugar
Coffee - Drink Drink Food And Drink Plastic Plastic Cup Plasticwaste Close-up No People Polution
Fish Food And Drink Plate Food Fischstäbchen Fishfillet Fishsticks Buttergemüse Mashed Potatoes Golden Erbsen Möhren Plate Of Food Tvfood Oven
Vongole Seafood Seashell Healthy Eating Food Close-up Freshness Food And Drink No People Organic Food Italian Food Italy Mussles Foodphotography Kitchen Cooking
Knife Wood - Material Still Life No People Table Close-up Blue Steel Steel Structure  Sharp Rosty Rost Used Vintage Butcher Butchers Shop Kitchen Utensils Kitchen Art Cooking Utensils
Food Plate Italian Food Serving Size Freshness Gourmet Close-up Meal Pasta Vongole Pasta Foodblog Temptation Nudels No People Ready-to-eat Still Life Foodphotography Italia Italian Food And Drink Organicfood Seafood Pasta
Ice Rink Ice Hockey Ice-skating Hockey Winter Frozen Hockey Goal Hockey Game Ice Winter Sport Indoors  Hockey Arena Hockey Rink Sport Still Eishockey Icehockey
Icehockey Eishockey Eishockeyschläger Hockeystick Drill Ice Gloves Hockey Exercises Drawing Sport Sport Style Stadium Hockey Rink Hockey Arena Still
Abstract Photography Agriculture Art Blooming Blue BYOPaper! Citrus Fruit Close-up Day EssenUndTrinken Food Food And Drink Food And Drink Foodart Freshness Fruit Healthy Eating Lemon Lemonade No People Organic Studio Shot Sunny Yellow Yellow Color
Bauernhof Blog Close-up Day Ernte Farm Food Food And Drink Food And Drink Foodphotography Foodporn Freshness Healthy Eating Indoors  Landwirtschaft Leafs No People Organic Organic Food Plants Süßkartoffeln Thanksgiving Wirsing Wirsingkohl
Bauernhof Blog Close-up Day Ernte Farm Food Food And Drink Food And Drink Foodphotography Foodporn Freshness Healthy Eating Indoors  Landwirtschaft Leafs No People Organic Organic Food Plants Süßkartoffeln Thanksgiving Wirsing Wirsingkohl
Bauernhof Blog Close-up Day Ernte Farm Food Food And Drink Food And Drink Foodphotography Foodporn Freshness Healthy Eating Indoors  Landwirtschaft Leafs No People Organic Organic Food Plants Süßkartoffeln Thanksgiving Wirsing Wirsingkohl
Bauernhof Blog Close-up Day Ernte Farm Food Food And Drink Food And Drink Foodphotography Foodporn Freshness Healthy Eating Indoors  Landwirtschaft Leafs No People Organic Organic Food Plants Süßkartoffeln Thanksgiving Wirsing Wirsingkohl
Blog Bread Breads Close-up Day Food Food And Drink Food And Drink Food Photography Foodblog Foodphotography Foodporn Freshness Freshness Imbiss Imbissbude Indoors  Meat Mustard No People Ready-to-eat Rindswurst Sausage Still Still Life
Frankfurt regional dish..... Handkäse mit Musik #apfelweinwirtschaft #backaging #brother #Food #Frankfurt #frankfurterküche #handkäsemitmusik #käse #regionaleküche #sommer #stilllife #stillphotography Close-up Essen Food And Drink Food And Drink Foodblog Foodie Foodphotography Foodporn Freshness No People Plate Ready-to-eat Table
Asparagus Vegetable Food And Drink Healthy Eating Green Color Food Organic Raw Food Freshness Bunch No People Vegetarian Food Close-up Essence Of Summer Asparagus Season Vitamin Organic Food Foodblog Essen & Trinken Food And Drink Refreshment Freshness Green Asparagus
Close-up No People Food And Drink Foodblog Party Essen & Trinken Food Bake Bakeryporn Millennial Pink
Cocktail Drinking Glass Water Drink Refreshment Freshness Food Close-up No People Drinks Essen & Trinken Party Vitamin Organic Food Foodblog Freshness Mint Plant Mint Healthy Eating Food And Drink
Drinking Glass No People Alcohol Close-up Party Partytime Jäger Jägermeister Jagerbombs  Vine Essen & Trinken Black Drinks
Knife Sunlight Shadow No People SLICE Table Freshness Close-up Healthy Eating Orange - Fruit Cut Drink Cooking Foodie Organic Essen & Trinken Sunlight Foodblog GMO Organic Food Vitamin Freshness Citrus Fruit Orange Blood Orange
Citrus Fruit Fruit SLICE Lemon Close-up Juicy Healthy Eating Freshness Food No People Sour Taste Halved Indoors  Cross Section Orange - Fruit Refreshment Cooking Foodie Organic Food Organic Essen & Trinken Sunlight Foodblog Drink GMO
Healthy Eating Citrus Fruit Fruit SLICE Freshness Food Directly Above Food And Drink Close-up Halved No People Table Vitamin GMO Drink Orangejuice Foodblog Sunlight Essen & Trinken Organic Organic Food Foodie Cooking Refreshment Orange - Fruit
Orange Citrus Fruit Fruit Freshness SLICE Orange - Fruit Healthy Eating Food No People Close-up Blood Orange Beach Refreshment Cooking Foodie Organic Food Organic Freshness Essen & Trinken Sunlight Foodblog Orangejuice Drink GMO
Orange Orangejuice Food And Drink Drink No People Close-up Freshness Sky Day Outdoors GMO Organic Food Organic Essen & Trinken Foodie Cooking Freshness Healthy Eating Refreshment SPAIN Fruit Sunbeam Sunlight Beach Umbrella Beach #drink
Egg Close-up Healthy Eating Freshness No People Food Blog Foodie Cooking Essen & Trinken Organic Food Organic Weet Weetfloor Weetabix  Seed GMO Foodblog White Yellow Baking Baking Time Baking At Home Asian  Asiancooking
Tomatoes Rispen Freshness Healthy Eating Fruit Food Close-up No People Red Green Organic Food Organic GMO Seed SPAIN Supermarket Foodblog Refreshment Nature Essen & Trinken Cooking Foodie Blog Day
Lens Flare Pink Color Sunlight People Outdoors One Person Sunbeam Day Close-up Millennial Pink Kids Fashion Winter Spring Backjards Clothings
Water Cold Temperature Cold Drink Drink Freshness Drinking Water Purity Close-up Frozen Refreshment Drinking Glass No People Nature Foodblog White Background Light Blog Food And Drink Humaninterest Humanityfirst Aquaculture Nestle
Flower No People Beauty In Nature Freshness Close-up Foodblog Nature Millennial Pink Extreme Close-up Spoon Cooking Essen & Trinken Petal Flower Head Fragility Indoors  Day
Knife No People Food Foodblog Cooking Cooking Time Close-up Lines Essen & Trinken Foodie Oldknife
Ananas Food Photography Freisteller Miniananas White Background Essen & Trinken Foodblog Freshness Food Ready-to-eat Fruit
Kino Indoors  Illuminated Dark Cinema Cinematography Interior Design Light Filmfestival Hamburg
Oktoberfest Food And Drink Close-up Freshness Food Culture Preparation  Extreme Close-up Munich München Essen Essen & Trinken Cooked Blog Küche Food Porn Awards Food Photography Serviervorschlag High Angle View Lifestyles
Multi Colored Close-up Geometric Shape Circle Colorful Focus On Foreground No People Strohalme Bunt Plastik Pink Color Bright Essen & Trinken Dekoration Deko Blog Trinken Küche Kitchen Utensils Spool
Fresh cooking Salmon Sashimi Salmone Close-up Salmon Roe Fishing Faroe Islands Fresh Cooking Lachs Fisch Orange Color Food Food Photography Foodphotography Food Porn Awards No People Sea Beach Nature Knife Skills Knife. Essen & Trinken Rezepte Serviervorschlag Sushi
People And Places People Sup Vaccation Vacations Beach Water Rippled Tranquility Summer Seascape Lifestyles High Angle View Beauty In Nature Non-urban Scene Tourism Shore Calm Nature Weekend Activities Sea Tranquil Scene
Hamburg Cityscape Architecture City Clear Sky Tourism Hafencity Hamburg Hafen Travel Destinations Reisen Travelling Cityexplorer Reiseblog Modern Office Building Skyscraper Building Exterior Tall - High Nopeople Topview Penthouse View
Gambones Garnelen Food Foodphotography No People Red Prawns Sushi Close-up Freshness Preparation  Mediterranean  Mittelmeer Fischerei Seafood Paella Seafoods Langostinos Kitchen Grill BBQ Homemade Organic Organic Food
Ferry Kirmes Achterbahn Farbenfroh Färben Bunt Multi Colored No People Europe
Food Tomate Getrocknete Antipasti SPAIN Packaging Foodphotography Close-up Delicious Delikatessen Nopeople Freshness Frisches Essen Rot Organic Food Bio Food Porn Awards Food And Drink Essen & Trinken
Sneakers Running Sport OldShoes Outdoors Change Economy Rezession Lifestyles Hamburg Alster Sportstadt Sport Olympia Joggen Laufen Laufschuhe
Paddling hamburg sundays sport focus way water Hello World
Climate Change/Klimawandel Art Bankrupt Change Climatechange Dessert Europe Fine Art Photography Global Warming HUMANITY Polution SPAIN Spexit Water
Wirtschaft Economy Brexit Rohstoffe Eisenbahn Güterverkehr Export Exportweltmeister Export Industry
Brooklyn Brooklyn Bridge / New York City Life Manhattan New York Skyline UN United Nations USA
Brooklyn Brooklyn Bridge / New York City Life Manhattan New York Skyline UN United Nations USA
Brooklyn Brooklyn Bridge / New York City Life Manhattan New York Skyline UN United Nations USA
Industrie Ruinen Dekalin Werke Hanau Analogue Photography Art Blackandwhite Dekalin Hanau Planfilm
Dekalin Architecture Art Blackandwhite Industrial Industrie Planfilm Plaubel Ruins
Dekalin Hanau industrial ruins Analog Analogue Photography Architecture Art Black And White Dekalin Deutsche Klebstoff Werke Fachkamera Hanau Industrial Industrial Ruins Planfilm Plaubel
From the Industrial series "Klebstoffwerke"Hanau am Main. Architecture on planfilm 9x12 Analogue Photography Architecture Black Collapse Deutsche Industrie Euro Europe EZB Fachkamera German Industry Hanau Hanau Am Main Industrieromantik Industry Industry Ruins IWF Planfilm Plaubel Rezession Rhein Main Rodenstock Scheimpflug Schnee Wallstreet Wirtschaft
Blackandwhite Boardshorts INDONESIA Lifestyle Surf Surfboard Surfer Surfs Up Traveling
Surfing Yzerfontain South Africa Western Cape Afrika Beach Nature Neopren Reisen Share Your Adventure Surfboard Surfer Surfing Life Tourism Travelling Tried Trocknen Waves Wetsuit
Hamburg, Germany fathersday at the Reeperbahn, red light district. Art Autoscooter Bad Condition Blau Deko Dirt Dreckig Fassade Hamburger Berg KNEIPE Morning Morningmood Old-fashioned Reeperbahn  Reisen Spilunke Street Streetart Streetphotography Tourism Vatertag
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Demonstration against the politics of the actual Bundesregierung, government in Germany. Specially against war and the rhetorik off Präsident Gauck. 13.12.2014. Bellevue Brd Bundesregierung Demo Demonstration Diplomatic Eu Europ Frieden Friedenstauben Gauck HBF Berlin Krieg Kriegsminister Medialer Ansturm Medien Merkel NATO Peace Polizei Presse Reporter Schloss Bellevue Vonderleyen War
Buttons Canada Close-up Fashion Hockey Icehockey Jeans Jeansjacket Levis Model Oldschool Puck Rock Still Life
Abstract Art Drink Food Glass H2o Lemon Polaroid Still Life Style Wasserglas Water
Art Bambaataa Concert Grandmaster Flash HipHop New York Oldschool Relaxing Tickets USA
Impressions when I surfed Bali. Alien Art Bali Building Colors Denpasar Flash Impression Landscape Rice Field Road Surfing Tourism
Impressions when I surfed Bali. Alien Art Bali Building Colors Denpasar Flash Impression Landscape Rice Field Road Surfing Tourism
Some impression from a surftrip in South Africa. Surfing the Western Cape from Paternoster down to Capetown via Betty's Bay up to Knysna and Plattenbergsbay. Art Blackandwhite Landscape Lifestyles Light And Shadow M Misty Road Roadtrip Surfing
Some impression from a surftrip in South Africa. Surfing the Western Cape from Paternoster down to Capetown via Betty's Bay up to Knysna and Plattenbergsbay. Art Blackandwhite Landscape Lifestyles Light And Shadow M Misty Road Roadtrip Surfing
Some impression from a surftrip in South Africa. Surfing the Western Cape from Paternoster down to Capetown via Betty's Bay up to Knysna and Plattenbergsbay. Art Blackandwhite Landscape Lifestyles Light And Shadow M Misty Road Roadtrip Surfing
Impressions when I surfed Bali. Alien Art Bali Building Colors Denpasar Flash Impression Landscape Rice Field Road Surfing Tourism
110 Autumn Car Chevrolet Chevy Concrete Contrast Contrast Colors Design Garage Garages Grafik Hood Kühler Lines Oldtimer Street Youngtimer
during a photoshoot on an airfield Airforce Airplane Aproaching Camera Dessert Helipad Landscape Ledder Mountain Photographer Reportage Ridgecrest TakeOff USA
during a photoshoot on an airfield Airforce Airplane Aproaching Camera Dessert Helipad Landscape Ledder Mountain Photographer Reportage Ridgecrest TakeOff USA
Altona ASV Bandofbrothers Bare Black Eis Eishockey Eishockey Tore Hockey Hockey Game Hockey Team Icehockey Lie LockerRoom Reportage Sanitäter Skating Rink Stretcher
Altona ASV Bandofbrothers Bare Black Eis Eishockey Eishockey Tore Hockey Hockey Game Hockey Team Icehockey Lie LockerRoom Reportage Sanitäter Skating Rink Stretcher
Altona ASV Bandofbrothers Bare Black Eis Eishockey Eishockey Tore Hockey Hockey Game Hockey Team Icehockey Lie LockerRoom Reportage Sanitäter Skating Rink Stretcher
Altona ASV Bandofbrothers Bare Black Eis Eishockey Eishockey Tore Hockey Hockey Game Hockey Team Icehockey Lie LockerRoom Reportage Sanitäter Skating Rink Stretcher
Altona Blackandwhite Eishockey Goalie Goalie Mask Ice Icehockey Locker Reportage Shoulderpad Skate
Altona Blackandwhite Eishockey Goalie Goalie Mask Ice Icehockey Locker Reportage Shoulderpad Skate
Altona Blackandwhite Eishockey Goalie Goalie Mask Ice Icehockey Locker Reportage Shoulderpad Skate
Board Eishalle Eishockey Goals Hockey Hockeyplayers Icehockey LockerRoom Skatingrink Stretcher Tactical Tafel Taktik
Bills Büro Büroklammer Calculator ContracTSigning Europe Federhalter Getting Inspired Hefter Interior Kuli Layout Money Office Paperwork Pen Pencil Rechnungen Ringhefter Signature Steuerberater Taschenrechner Taxi Unterschrift Verträge
Bills Büro Büroklammer Calculator ContracTSigning Europe Federhalter Getting Inspired Hefter Interior Kuli Layout Money Office Paperwork Pen Pencil Rechnungen Ringhefter Signature Steuerberater Taschenrechner Taxi Unterschrift Verträge