Duration : 0:15:22

Technorati Tags: factory, filters, lee, lee filters, lee filters manufacture, photo, photographer, photographic, Photography, photography tuition

Expert: Scott Vallance
Bio: Scott Vallance is the owner of VIP Photographic.com.
Filmmaker: julio costilla

Duration : 0:3:24

Technorati Tags: beginning photography, beginning photography advice, beginning photography guide, beginning photography help, beginning photography lessons, beginning photography tips

So are B+W and Tiffen.

There are generic filters and brand name filters. If there were grey market filters, the savings would be less than a quid
.
I pay about US$90 for my Hoya or B+W filters. The UV filters are changed out about every six to nine months due to abrasions caused by mud or bumps, good insurance against buying a new lens from time to time due to a damaged front element.

Duration : 0:7:57

Technorati Tags: by, college, color, community, custom, date, Excel, excelisfun, Filter, Filtering, Gel, Girvin, Highline, Mike, number, text

Cone Calculator: http://bit.ly/qLpBk4

Duration : 0:10:18

Technorati Tags: 55-gallon-drum-filter, aquaponics, bead-filter, clarifier, DIY, how to, mechanical-filter, organic-fertilizer, settling-tank, theurbanfarmingguysa, vortex-filter

Q: how much did they cost you?
A:$250, minus media.

Q:were they hard to build?
A:no, not at all. took a little less than 2hrs start to finish.

Q:do they work well?
A:i studied the design for almost 6 months before building, so i hope so. its a combination of a few systems and designs ive seen over the years. simple, and effective.

heres the parts needed to replicate this system.
4-55 gallon barrels, doesnt matter about which top it has.
2-1″ bulkheads(for inlets)
6-1″ male adapters
2-1″ female adapters
2-1″ ball valves
3-2″/5′ long pvc pipe pieces
2-2″ elbows
8-hose clamps
1-100′ roll of 1″ pipe
1-tube of 100% silicone sealant.

and thats it, cost me 100 for the barrels, and 150 for fittings and pipe
if you want to build this, message me and ill send ya the entire build instructions for these.

Duration : 0:3:52

Technorati Tags: 3700, 55, and, answer, Aquarium, barrel, barrels, cheap diy filter, clamps, deck, decking, diy pond, explanation, filter media, filters, fish, fishing, gallon, GPH, how, how to, howto, koi, liner, list, my, of, outdoors, parts, pipe, piping, pleco, pond liner, pond plants, pumps, question, river, rocks, streams, supports, swimming, tank, valves, water:, waterfall, wildlife, work

An AIR FILTER is a device which removes solid particulates such as dust, pollen, mold, and bacteria from air. Air filters are used in applications where air quality is important, notably in building ventilation systems and in engines, such as internal combustion engines, gas compressors, diving air compressors, gas turbines and others.

Some buildings, as well as aircraft and other man-made environments (e.g., satellites and space shuttles) use foam, pleated paper, or spun fiberglass filter elements. Another method uses fibers or elements with a static electric charge, which attract dust particles. The air intakes of internal combustion engines and compressors tend to use either paper, foam, or cotton filters. Oil bath filters have fallen out of favor. The technology of air intake filters of gas turbines has improved significantly in recent years, due to improvements in the aerodynamics and fluid-dynamics of the air-compressor part of the Gas Turbines.
PLEASE SUBSCRIBE!!!!!!!

Duration : 0:5:34

Technorati Tags: air, cars, channel, discovery, filters, how, HowItsMade513, its, made, Popsci, science

As you’ve learned the hard way you just can’t set a shutter speed because you want to and expect good results. The three legs of the Exposure Triangle must be balanced or disaster awaits.

ISO is simply a measurement of the sensitivity to light of a light sensitive surface, either film or digital sensor. The lower the number (50, 100) the less sensitive. ISO 100 is a good choice for outdoor photography.

The Aperture is simply an opening formed by the movable blades of the diaphragm inside your lens. It is expressed as an inverse relationship – f1.4 is a very large opening while f16 is a very tiny opening. The larger the opening the more light admitted by the lens.

The Shutter Speed controls how long the light admitted by the aperture used is allowed to expose our film or digital sensor at a given ISO. Using ISO 100 on a sunny day and an aperture of f16 will result in a slower shutter speed than using ISO 100 and f1.4.

The old "Sunny 16 Rule" best illustrates the ISO/Aperture/Shutter Speed relationship. It states: "On a sunny day set your aperture to f16 and your shutter speed to 1/ISO." So if we didn’t have a light meter in our camera and use ISO 100 a "Sunny 16" Exposure Chart would look like this:

f360 @ 8 sec. -9 stops
f256 @ 4 sec. -8 stops
f180 @ 2 sec. -7 stops
f128 @ 1 sec. -6 stops
f90 @ ~1/3 sec. -5 stops
f64 @ ~1/6 sec. -4 stops
f45 @ ~1/12 sec. -3 stops
f32 @ 1/25 sec. -2 stops
f22 @ 1/50 sec. -1 stop
f16 @ 1/100 sec. "Sunny 16"
f11 @ 1/200 sec.
f8.0 @ 1/400 sec.
f5.6 @ 1/800 sec.
f4.0 @ 1/1600 sec.

Remember that the larger the aperture number the smaller the opening and the slower the shutter speed at a given ISO. Even if your lens stops down to f32, on a sunny day using ISO 100 your pictures would be severely overexposed by 6 stops at 4 sec. and 7 stops at 8 sec.

I have no doubt that you now know why a Neutral Density (ND) filter is often considered mandatory for long exposures in full sunlight. If you’d rather not invest in an ND filter you can use a Circular Polarizer which will usually lose 2 stops, giving you an equivalent aperture of f32 if your lens only stops down to f16 or f64 if your lens stops down to f32.

Here are a couple of pictures I made a few years ago, using a 35mm film camera in Aperture Priority with ISO 100 film and a 21mm lens at f16 with a circular polarizer. I didn’t check the shutter speed but it was probably 1/8 to 1/4 sec. due to the slightly shaded area.

http://www.flickr.com/photos/drifter45h/2025058508/

http://www.flickr.com/photos/drifter45h/2024256265/

This site has some good tips for shooting waterfalls:

http://www.digital-photography-school.com/waterfall-digital-photography

Duration : 0:8:19

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