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Optics is the science of light, and in photography often refers more specifically to to the properties and construction of lenses or the technical aspects of light sensors.

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Projector Design and lenses

I am working on a project where I need to project a single image onto an object, Originally I was looking at the digital projector route but due to cost and complexity this has been ruled out. I found ...
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Technical book or resource (non-creative) [duplicate]

I'd like a resource from which to learn about technical, non-artistic/technique aspects, such as: Onion ring bokeh, and what causes it. Choosing of lens hoods, Why chromatic aberration happens/why ...
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43 views

Technical question about aperture and lens [duplicate]

F stop = focal length / iris diameter So for example, my Lumix 20mm pancake, f1.7, has iris diameter of 12mm at that f stop, correct? So if Panasonic wanted to make a faster lens, could they do it ...
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46 views

What defines camera's size? [duplicate]

Smartphone cameras are small while others are big. I know some functions like zoom can change physical size, etc. So, ignoring a zoom lens, what defines a camera lens? I want to get the general idea ...
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232 views

How is it possible for bridge camera with 50x zoom to cost so little? [duplicate]

i state that i'm a completely beginner in the wonderful world of photography. Last year i bought a Fujifilm FinePix S2980 ...
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38 views

What causes the rays surrounding strong lights? [duplicate]

I've noticed, especially in long-exposure city lights photos, that strong light sources are surrounded by rays. The number of rays seem to depend on the lens being used. What causes these rays and the ...
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1answer
93 views

Optical focal length [duplicate]

i have a quick question. We have a machine which has a camera mounted above a board at 75cm. The cameras ability to focus on an object at 0 zoom is 1cm, and all full zoom 120cm. The zoom is build ...
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58 views

Different sources of noise and ways to avoid/correct those [duplicate]

Possible Duplicate: What types of noise can be present in digital photographs? I've few questions related to noise found in digital images. There are topics on this forum on underexposure ...
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134 views

Is it possible to make an image which is only photographable in black or white?

Not sure if this is the right forum to ask this. Here is what I'm looking for: Example: I have a color photo could be text could be an image What I would like: if someone photographs this ...
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972 views

How to calculate the magnification factor of an object to its image?

I have an object of size 37.5um x 37.5um, and captured a 640 x 480 resolution image of the object with a CMOS sensor. I see that the object is around 200 x 200 pixels in the image. How do I calculate ...