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78What's The Best Lens For A Canon EOS Digital Camera? The Top Choices Revealed
A great lens is more important to the quality of your photos than is a great camera. Here are the best lenses, in a variety of price ranges, for the Canon EOS series of digital SLR cameras
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74Meade ETX 125 Telescope
My boyfriend got me the Meade ETX 125 telescope for my birthday and anniversary. It's nice to know that he was listening all those times I had my head tilted towards the stars rambling on and on about our...
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66Aperture and Focal Length
Ok, so you've just bought a brand new DSLR and it has way too many buttons and dials on it. All too soon it won't be enough for you anymore and you'll want to upgrade, but you have to start somewhere and...
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59SLR camera is worth buying
SLR cameras are more expensive to buy though, but they can at any time to adapt to growing skills and increasing demands. Opting for a new camera that was probably never more difficult than today. The...
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52Digital Surveillance
Digital Surveillance: An Overview Contents •1. Introduction a. Need of Digital Surveillance b. How it compliments Alarm system c. Home Automation •2. Lens Selection a. Focal length of...
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42Best SLR Digital Camera For 2009
Digital SLR comes from SLR cameras, which is called this way because the mirror that sits behind the lens of the camera and sends the light to the viewfinder. The DSLRs are designed so you can use a large...
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64Depth Of Field
Depth of field is, in simple terms, the distance between the nearest and furthest objects in a photograph that appear to be in focus. Why is depth of field important? Depth of field defines the "feel" of a...
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56MATHEMATICS: Ratio, Proportion, Variation - Conductor wire Resistance, Reactance, Capacitance, Photograph exposure, Lens
RESISTANCE is inversely proportional to the SQUARE OF WIRE DIAMETERexample:A wire AWG size 12 of 0.08 inches in diameter has a resistance of 15 ohms. Find the resistance of AWG 10 size conductor with a...
