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.
브 랜 드 : 롱펑 렌 즈 지 름 : 80 mm 초 점 길 이 : 480mm, f/6 렌 즈 코 팅 : Fully multi-coating 몸체 (body) : 알루미늄으로 CNC 무 게 : 2.4 kg 사 이 즈 : 385 mm 색 상 : 빨강(Red) 접 안 렌 즈 : 23~69배 줌렌즈(별도) 기 본 구 성 : 대물렌즈캡, 소프트 케이스 - 별매 옵션상품 - 1.정립프리즘(필수) 1)45도 정립프리즘(상급): 69,000원 2)HighGrade 45도정립프리즘(최상급): 156,000원 2.접안렌즈(필수) 1)7-21mm 줌 접안렌즈(상급): 78,000원 2)8-24mm 울트라와이드 줌접안렌즈(최상급): 161,000원 3)그외 접안렌즈(33,000 ~ 161,000원) 3.촬영아답터 1)DSLR 촬영아답터: ①+②필요함 ①T-마운트: 22,000(니콘,캐논,소니,펜탁스,미놀타,삼성) ②2인치 포토아답터: 33,000원 2)자동카메라 촬영아답터(중형): 55,000원
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