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AXISQ16NetworkCameraSeries
Productoverview
Howtochooselens
Thereismorethanonelensoptionforyourcamera.Whichlenstochoosedependsonthesurveillancerequirements.Thelenseshave
differentcapabilitieswhenitcomestolightsensitivityandeldofview.Seetheproduct’sdatasheetforlensalternatives.
Aboutdepthofeldandsensorsize
Thedepthofelddependsonthelensaperture,thesizeoftheimagesensorandthedistancetothescene.Thelowerthef-number
andlargerthesensor,theshallowerdepthofeld.Duetothelargesensor,thedepthofeldismoreshallowinthisparticular
productthanintraditionalsurveillancecameras.Depthofeldbecomesshallowerindarkconditions,duetothefactthattheiris
opensuptoprovideenoughlighttothesensor.
Findoutmoreataxis.com/learning/web-articles/lenses-for-network-video-cameras
Aboutfocusandlightsensitivity
Thefocuspointisaffectedbytheaperture(f-stop)ofthelens.Thelowerthef-stopvalue,themorelightreachestheimagesensor.
Thesmallertheaperture,thedeeperdepthofeldwhichmayleadtoanunwantedabsolutefocuspoint.Duringlowlightconditions,
whentheapertureisaslargeaspossible,thedepthofelddecreasesandtheimagemaythereforeappearunfocused.
Examplesofaperturesfordifferentf-numbers.
Tocalculatethedistancebetweenthecameraandtheobjectofinterestinrelationtoscenedimensions,resolution,andfocallength,
usethelenscalculatortool,gotoaxis.com/tools/lens-calculator
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