Tax Exemptions: Please create an account and submit Tax Exemption documentation to Support@MachineVisionDirect.com. After documents have been reviewed and accepted, account will be tagged as tax exempt from all future purchases. Review generally takes 1 hour or less.

fov和焦距的关系

lens value is basically telling us how far the camera is from the object (visually/render speaking) without affecting camera aperture values

No, focal length is the distance between the sensor plane and the focal point where rays converge inside the lens. It is in millimeters and does not represent the distance between the camera and the object. Example: a camera 5 meters away from the subject with a 50mm lens is not the same as a camera 10 meters away from the subject with a 100mm lens.

FOV to focal lengthcalculator

I am not talking about the camera Matrix, cos changing distance there would also affect the camera aperture values. I need really just the zoom in/out (equivalent of FOV)

FoVcalculation

If your camera doesn’t move, focal length acts like a crop in your image. If your camera moves to compensate for the framing change induced by the focal length adjustment, focal lengths controls perspective compression (what we call dolly zoom, or vertigo effect)

…cos from my test it is exactly that: a camera zoom, basically, but I would like to hear it form ppl that actually know Cycles well enough.

Focal length

Need Assistance with specifying or customizing any of our products? Contact us to talk to one of our Automation Engineers!

fov是什么

Machine Vision Direct offers Smart Vision Lights generous 45 day trial period. Contact us if you are interested in trying a light.

GigE Vision is a vision standard that allows for fast image transfer over long distances using economical ethernet cables. This standard is governed by the Association for Advancing Automation, also known as A3. Machine Vison Direct offers GigE Vision Cameras from leading manufacturers such as JAI, Opto Engineering, The Imaging Source, and more. Additional Information on the GigE Vision Standard can be found at A3 Vision and Imaging

FOVcalculator

Unfortunately, there is noone there on their forums that could answer this type of question for me, so I am asking here at the original place of Cycles renderer.

That is: lens value is basically telling us how far the camera is from the object (visually/render speaking) without affecting camera aperture values - correct (that is how ti behaves in my tests)?

So, it is what I thought, basically, rendering software speaking: if I change the camera lens value I get the same result as changing the FOV value in other rendering software, right (that is what it looks like when I test it and also it is how I understood your reply)?

If you require an accessory that you cannot find on our site, please contact us and we will source the component for you.

Machine Vision Direct is an authorized distributor of Smart Vision Lights, a leading industrial machine vision lighting supplier. When you contact us, our engineers answer the phone and are more than happy to assist you in picking the vision system or accessories that best suit your system. You can even send us application images and details to have us assist in picking out an appropriate vision system.

I am trying to understand how to zoom in/out in the scene, so I am asking here someone who knows, if the lens value is the same as FOV/Zoom value in other softwares (I am working with Cycles standalone clone from other developer but it has no dedicated FOV command line parameter, but I found out that when I change the lens value it basically do the same as FOV…or am I wrong?).

Zoom is a term that defines lenses that have a changeable focal length. There are prime lenses (fixed focal length) and zoom lenses. What you call camera zoom is the effect of changing the focal length while recording.