The focal length of CCTV security camera fixed lens is permanently set, meaning the field of view of fixed lens security cameras cannot be changed. In a nutshell, the CCTV camera lens types can be divided into security camera fixed lens (also called monofocal lens) and security camera varifocal lens. Best Security Cameras with Fixed/Varifocal Lens.Now continue reading to learn how you can choose a right security camera lens and find the best security cameras with wide angle lens/varifocal lens that suit you most. To get the best picks of security camera lens, it is important to gain an insight into the CCTV camera lens types and comparison first. Though the numbers listed with the security camera lens seem simple enough, it is far more confusing to know the implications behind those numbers.
However, as the subject is sitting in the centre of the frame, if she is affected by any distortion it’s so minimal as to not be evident at all.Q: What's the CCTV security camera lens mm meaning? How can I choose a best security camera lens?Ī: Understanding the security camera lens can be a tricky process.
In this portrait, shot at 17mm, the lens has elongated her shadow, almost making it the hero of the image.Īdditionally the road appears to stretch away from her significantly, leading us to wonder where it leads. However there are some aspects of portraiture, child portraiture in particular, where some characteristics of a wide angle can lend itself beautifully, for varying reasons.ĭistortion is always most evident the closer to the edges of the frame your subject sits. This is not a desirable outcome if you’re shooting a traditional portrait because your subject will appear cartoonish. Traditionally wide angle lenses are not used to shoot portraits because the distortion makes everything closest to the lens appear larger than reality and out of proportion with other objects in the frame that are further back. We love this shot for the way she has rendered an every day happening into art! Side note: if you’re anything like me you don’t want to be standing on a ladder with your expensive camera!Īs a bonus the wide angle would have exaggerated the spread of that spill and overall it’s more loosely framed than it would have been with say 50mm, which I feel lends it a sense of casualness. If this had been shot at what might be considered a more obvious choice of say 50mm, she would have needed to elevate herself using a step ladder or a chair! In this photo, by shooting at 28mm the photographer could place herself directly over the subject and shoot from her own height and still get everything in the frame. I took this shot lying on my back, looking up, using the converging vertical lines of the trees not only to artistic effect, but they also acted to frame that gorgeous cotton wool sky. One of the characteristics of wide angle lenses is vertical lines appearing to bend, and this is something you would almost always attempt to minimise, avoid or correct in processing if you’re shooting architecture for example.īut this image is a great example of how that effect can be used for good! We’ve assembled the most useful tips on how wide angle distortion can be used to create beautiful, creative images, and maybe even to capture some slightly unexpected perspective on on everyday subject! Sometimes the distortion can be something to avoid… it can create an effect that we don’t want, such as skewed lines, or elongated limbs.īut on the other hand, because the distortion exaggerates size, it means wide angles are an obvious choice when it comes to shooting landscapes (or real estate photos 😉 ) because who doesn’t want bigger mountains, longer clouds, wider oceans and forests that disappear into the frame?Īlso, their skewed perspective can be used to our advantage to create artistic images in other genres of photography where you wouldn’t normally think to use a wide angle lens.
#Camera lens distortion model hands to big full#
Wide angle refers to the focal length of our lens, and any google search will tell you a wide angle lens is a lens with a focal length of 35mm or less on a full frame sensor DSLR (full frame models are the higher level or pro DSLR models).īut if you have a crop sensor DSLR (entry to mid level range), a wide angle on your camera is more like 10-24mm. The cause of the distortion is that the lens is shaped in a way that allows it to include more in the frame than the eye naturally sees… it squeezes in extra width by pushing everything back and kind of bending the edges in. Wide angle lenses are the queens of distortion! They stretch, elongate, and generally exaggerate the size of objects through the viewfinder.
0 kommentar(er)
