Keywords
50 to 54 years, 50 to 59 years, adult, alone, analyzing, assistant, below, blur, caucasian ethnicity, check, clipboard, close, close-up, color, detail, differential focus, facial hair, flair, focus, focus on foreground, focus techniques, guardian, hard hat, head and shoulders, headshot, helmet, holding, indoors, industrious, lab coat, lab technician, labor, laboratory, looking, looking away, looking down, low angle view, male, man, mask, mature adult, mature man, microscopy, older, one person, only adults, only mature men, only men, only one adult, only one man, only one mature man, optical, portrait, professional, protection, protective clothing, protective mask, research, safe, safety, science, science collection, scientist, shallow focus, single, skill, stationery, stubble, system, technician, technology, view, view point, white, white color, work, working, stock image, images, royalty free photo, stock photos, stock photograph, stock photographs, picture, pictures, graphic, graphics, fine art prints, print, poster, posters, mural, wall murals, u24709870