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There are mny different types of subjects that can be focused on with a camera. Such as, people, special events, nature, animals, etc. A normal topic would be nature, taking pictures of flowers, waterfalls, and many more.

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This is what recent filters look like. When you take a picture you can go to a settings and there are different types of filters you cna use. You can use these filters to show what the original picture looks like in different many ways.

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Photographers use  fiilters to enhance the look on the picture when they use the filter. filters are used to change the color, the way the picture looks and  many more ways. There are differnt ypes sof photography options like taking pictures of nature, people, buildings etc.

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Frederick Wratten's business partner

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Kodak Series V Polarizing Filter

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Frederick Wratten was an english writer and manufacturer and Henry Wainwright who was his business partner founded the first photographic supply. They decided to start their own business called Wratten  and Wainwright in 1878. They created a variety of collodion dry plates called London Ordinary Gelatin Dry Plates.

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This is a picture of a rug that was used in a filter and not with a filter. It shows the rug on the right with the filter and it looks mors unique and clear than the one on the left. Wratten and Wainwright used filters on different objects to create a different affect more intriguing to the eye.

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'With film cameras filters have traditionally been used to modify both the spectral content (color) and intensity of light, as well as generating special effects like soft focus. Digital cameras operate somewhat differently with respect to color though. Color modification can easily be done "in camera", and that's what you're doing when you set white balance. So while for film warming and cooling filters, or filters which convert fluorescent light to look like daylight, may be required, digital can achieve the same effects by internal manipulation of the digital data. ''
http://www.bobatkins.com/photography/tutorials/digital_filters.html

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Some popular filters on social media are Clarendon, Gingham,  Juno,  Lark, and Moon.
http://www.travelandleisure.com/travel-tips/mobile-apps/most-popular-instagram-filters

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Motives are improving aesthetics, adding vintage effects, highlighting objects and making photos appear more fun and unique.

http://photogramio.com/photofilters

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The Endura UV & Protector filter is similar to the Sapphire one, except it uses Gorilla Glass instead of Sapphire. It’s other specs and features — including transmittance and UV blocking — are identical to the Sapphire filter.
http://petapixel.com/2015/03/17/novo-to-be-the-first-lens-filters-to-feature-sapphire-crystal-glass-for-strength-and-clarity/

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The purpose of a UV / Clear / Haze filters today is to simply protect the front element of a lens. In the past, these filters were used to block UV from hitting the film.
https://photographylife.com/lens-filters-explained

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What did they do to make Filters better as technology developed?

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What did they do to make Filters better as technology developed?

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Over that sensor is a filter designed to allow in the three primary colors: red, blue and green. But by doing so, natural light hits the filter, and the filter absorbs two thirds of the color spectrum in order to let through each of the three primary colors.This is how it's been done since the 1970s. So for the last 40 years, not much has changed in this technology.
http://phys.org/news/2015-10-team-camera-filter-sharper-brighter.html

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Wratten and Wainwright developed the first photographic filter, which led to them working with Kodak (http://historiccamera.com/cgi-bin/librarium2/pm.cgi?action=app_display&app=datasheet&app_id=2239& ).