배 율 : 8배율 대물 렌즈 지름 : 42mm 접 안 점 거 리 : 20mm 실 시 야 각 : 7.8 ˚ 체 감 시 야 각 : 62 ˚ 최근접관측거리 : 2.1m 크 기 : 150x130mm 무 게 : 670g 프 리 즘 타 입 : BaK4 렌즈 코팅 타입 : 풀멀티코팅, P2 페이즈코팅,에메랄드코팅 삼 각 대 장 착 : 가능(비노홀더별 방 수 : 침수방수, 결로방지 질소충진 구 성 품 : 스피릿 XF 8x42 접안렌즈 커버 대물렌즈 커버 넥스트랩 광학섬유 소프트케이스
Easy blowing, High tone dog whistle, fitted with solid, waterproof pearl, to give a trill for those who want a distinctive and different sound. With a frequency that fluctuates by 750 Hertz. 210 Small ultra high pitch whistle has a natural cork ball which produces the familiar 'trilling' roll of the pea whistle. 210.5 Same as the 210 but with out the cork ball, produces a single extremely high frequency.
Specifications Fieldmicroscope Magnification (x) 20x (fixed) Optical system Upright, unreversed image; eyepiece diopter adjustable for right eye; 56-to-72mm interpupillary distance adjustment Field of vision (mm) 11 (diameter) Angle of view (º) 12.6 Vertical adjustment 50mm from the base of stage Eye relief (mm) 11.1 Plate Removal and reversible (top: flat; underside: built-in cup) Light source 2.5V-0.5A halogen lamp Light settings On/off Power source CR 123A lithium battery; approx. 1-hour bat