Ключевые слова: adventure, aid, avian, background, binoculars, bird, birding, birds, black, clarity, copy space, detail, discover, education, enthusiast, equipment, exploration, field, focus, glass, guide, guidebook, hobby, identification, instrument, knowledge, leisure, lens, magnification, manual, nature, observation, optical, optics, ornithology, outdoor, precision, recreation, research, species, study, viewing, visual, watching, wildlife, zoom,