optical zoom vs digital zoom

{"title":"Powerful Digital Night Vision Monocular Black Thermal Imaging Monocular","imgUrl":"https:\/\/img.chinax.com\/nimg\/b6\/8d\/f13bf286ce1be86966c3d263e775-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"Mottling","Model Number":"LS-650","Minimum Order Quantity":"100","Delivery Time":"4-6 working days","Certification":"FCC,RoHS,CC","Place of Origin":"China","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union, MoneyGram","Supply Ability":"5000+piece+month","Packaging Details":"16X16X10cm","Magnification":"6.6x-18.0x","Viewing Range:":"1000ft\/305m","Objective Lens":"50mn","Battery Type":"AA(4)","Waterproof":"IPX6","Name":"The Pop Thermal Night Vision Optical Sight"}}

{"title":"Long Distance Trinocular Stereo Microscope , 0.6X-5.5X Zoom Microscope","imgUrl":"https:\/\/img.chinax.com\/nimg\/9b\/70\/99d385c2b46775ffc2101fb4477d-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"VANCO","Model Number":"VS-0655","Minimum Order Quantity":"ONE PC","Delivery Time":"According to order quantity","Certification":"CE","Place of Origin":"CHINA","Supply Ability":"500PCS\/Month","Packaging Details":"In Styrofoam and carton","Theory":"Stereo Microscope","Drawtube":"Binocular Microscope\/ Trinocular Microscope","Application":"Wide","Color":"White","Objective":"0.6X-5.5X","Warranty":"1 year"}}