What determines a cmos camera's viewing angle ?

[evileyes]

Hello Friends,

I am glad to have found such a great forum !

Could you please provide me the answer to the above question?

I bought a pinhole cmos b/w camera but it turned out that it has a very narrow viewing angle , about 30-40 degrees only. This one just has a pinhole 'apperture' .

I also bought another type of cmos camera which has some kind of lens attached to the pinhole and other than this , both looks similar. This one allows me about 70 degrees viewing. Is it due to the tiny lens infront? If so, how can I make the viewing angle wider from 30 degrees to say 80 degrees or more?

thanks !!

regards
E.

 

[Red Prince]

What determines a cmos camera's viewing angle? I would presume it is the same as with any camera. That is to say, its being cmos should have nothing to do with it.

So, then, the viewing angle would be determined by the distance of the pinhole from the film plane and the size of the film frame. Or, in your case, the distance of the pinhole from the cmos sensor and the size (in square milimeters, or square inches) of the sensing area.

Additionally, when you add a lens (or, more precisely a lens assembly, aka an objective), this can change the effect of the distance of the pinhole from the film/cmos, and that, in turn, would affect the viewing angle.