Earlier this month, in my article, What do I do about those dust spots on my digital photos? I discussed how to clean your dirty DSLR sensor. Since then, I’ve received numerous emails asking how photographers can prevent their DSLR sensors from getting dusty and dirty.There are techniques to use to slow down an accumulation of dust and dirt on your DSLR sensor, but if you take enough photos, eventually you’ll need to clean it.
Each time photographers change lenses on their DSLRs they open up the camera to allow dust to enter. In addition, zoom lenses can bring in dust to the camera. Many zoom lenses literally vacuum in dust to the sensor area of the camera when the photographer zooms their lens in and out. Different zoom lenses have different affinities for pulling dust into DSLRs. Consumer quality zoom lenses which use external lengthening/shortening to change focal length are particularly prone to this, compared to pro level zooms which zoom internally.
The Museum of Contemporary Photography, in Chicago, IL has some of the most exciting exhibitions of contemporary photography in the US. 
I was recently having a very interesting theological discussion with a friend. Eventually we discussed the concept of “sin.” He mentioned the “Seven Deadly Sins,” to some, known as the “Capital Vices” or “Cardinal Sins.” He told me the final list consisted of: wrath, greed, sloth, pride, lust, envy, and gluttony.
The California Museum of Photography, located at the University of California Riverside has some of the best exhibitions of photography in the country. 
Generally, when people are located in public spaces, they have no expectation of privacy, so the photographer doesn’t violate their right of privacy when taking their photo in a public space.
After the photo is taken, new concerns of privacy come into play, and one’s person right of publicity. For example, generally, a photographer violates a person’s right of publicity when, without permission, the photographer uses a photo of a person for the photographer’s own benefit, sometimes referred to as “commercial” use as opposed to an “editorial” use. Like many concepts in law, this one isn’t precisely straightforward.
The National Gallery of Art has an extensive collection of photographic images, however, most are not regularly on display. This exhibition, 
In recent months, numerous readers sent emails to me about dirt and dust problems on their photos. They had cleaned their lenses, but the spots remained. They examined their 
The Museum of Modern Art (MOMA), in New York, NY has some of the most amazing exhibitions of contemporary photography in the US. 
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