Started Mar 1, Discussions. Forum Threaded view. What's the mm equivalent of 8, 10, 18X etc optical zoom? Mar 1, Hi, I have an 18X optical zoom on my bridge camera. Cheers, Pa. Reply to thread Reply with quote Complain. Re: What's the mm equivalent of 8, 10, 18X etc optical zoom? Cheers, Pa -- hide signature Reply Reply with quote Reply to thread Complain. The answer is that you're not going to be able to afford it.
AnandaSim's gear list: AnandaSim's gear list. Hi, In the answers below, there's one element missing. Watch out, though, that most DSLRs are not full frame and also have a conversion factor. The closest you'll get is something like a mm for APS or the mm for Olympus. PeterLeyssens's gear list: PeterLeyssens's gear list.
Ignore the x-factor. Look at start and end focal length instead. Cheers, Pa The simple answer is - this is the wrong question. Hope this helps, Peter. Re: Ignore the x-factor. After compensating for its crop factor. F Forum M My threads.
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Create a free Team What is Teams? Learn more. How do I convert lens focal length mm to x-times optical zoom?
Ask Question. Asked 10 years, 4 months ago. Active 3 years ago. Viewed k times. Improve this question. Jez'r 2, 3 3 gold badges 27 27 silver badges 47 47 bronze badges. Related: What does 'how much zoom' mean? The "mm notation" is the focal length. Note that when computing the zoom ratio e.
You are right. That's it :- — MetroWind. It's pretty nice. Show 1 more comment. Active Oldest Votes. Improve this answer. Add a comment. It will depend on how you define the "zoom factor". Is it field of view or focal length? Nick Bedford Nick Bedford 9, 3 3 gold badges 27 27 silver badges 40 40 bronze badges. Just focal length, I'm only considering the magnification of the image.
Actually, I think it is linear, isn't it? That's because zooming is mathematically like cropping, so each doubling of focal length is halving dimensional field of view in a very straightforward way. Nick Bedford, mattdm - I'd stress that the actoal FoV change is indeed nonlinear. For relatively long focal lengths, the angles are small and the change is approximately linear. However, as you get to the wider side, the angles become large and the mapping from focal length to angle of view is nonlinear.
Having a 10x zoom on a camera phone is no mean feat: it means the device will offer a zoom ranging from So, how does this zoom work - given there's such a small area on a phone to cram the necessary lenses in?
Oppo is using technology that it had revealed before as the base of its zoom. This is a 5x optical zoom sensor that was announced back in Added to this is a wide-angle zoom lens and there is also another lens in the middle that will allow for regular shooting and doesn't actually do anything to the zoom. To find an answer to this question, we have to first bring the two types of cameras to same platform.
Currently, they are like apple and oranges and cannot be compared. We have to bring everything in terms of focal length in mm on a standard scale. Let us compare both of them to "35 mm equivalent" or to the full frame camera. The size of sensor of full frame camera is 36mm X 24mm 35 mm equivalent. Every camera's technical specification provides the size of its sensor or the crop factor.
You can find this crop factor by dividing the 36mm by longer side of your sensor dimension. For e. Now, divide 36mm by This is your crop factor. Smaller cameras, point and shoot cameras and four third systems have even smaller sensor, so bigger crop factor refer to the image below.
For exact crop factor of your camera, refer to the technical specification provided by the manufacturer.
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