Choosing for Room Size/Viewing Distance Every projector has a throw ratio. This refers to the size of image the projector can create for a given distance. This is usually a range, thanks to the optical zoom – you can find it in the user manual or specifications page online (if it’s for a projector you plan to buy). You can calculate the projection image size by dividing the distance between wall and the projector by the throw ratio of the projector.

So if your projector is placed 10 feet away from the screen and has a throw ratio of 1.8-2.22, then you can get an image size that ranges between 54 – 66 inches. Ideally, you should be sitting at a distance that is more than twice the width of the image. To make things simpler, many manufacturers offer a distance calculator on their website for various models. Here, you just input a distance or required screen size. 

Projecting on Walls vs Screens

Screens are the best way to get the best performance from a projector. A screen will always be smoother than a wall and it will offer higher, more even reflectance. Some screens have gain – they reflect light better, thanks to shiny particles – and this helps in brighter rooms or if your projector is old or has low brightness. Some screens have black borders that add to the perceived contrast – making the image seem better.

By Hitesh Raj Bhagat

See Full Story at economictimes.indiatimes.com

The Epson EH-LS100 (sometimes referred to as the Epson Home Cinema LS100 in America) combines two of the biggest trends on home projection right now: it’s an Ultra Short Throw (UST) design that uses a laser light engine.

Ultra Short Throw models sidestep one of the most challenging aspects of home projection – space. To that end, you don’t need a large room and unobstructed view to cast a monster image. Instead, UST models can be positioned like a TV, just inches from a wall. They’re the perfect solution when space is tight.

Speaking of longevity, the anticipated life of a laser diode is at least 20,000 hours –
around 10 times the life of a standard bulb you’d find on an older projector, and six times that of the bulbs inside Epson’s newer projectors. Opt for an eco-friendly lamp setting, and this can be extended to approximately 30,000 hours.

Even better, Epson promises no erosion in colour intensity over a ten year period. This makes the EH-LS100 basically service free, minus some air filter changes.

When you’re in the market for a new projector, there are a lot of different factors to consider: how bright is the projector, or what kind of max resolution can it project at? Can it be mounted on the ceiling?

But, of all these questions you’ll have to ask yourself – before shopping for the best projector money can buy – perhaps the most important is: what’s the difference between a “short” throw and “long” throw projector. If you don’t know what either of those terms mean; fret not we’re going to fill you in on all the details and more in this handy guide on short throw vs. long throw projectors.

What Does “Throw” Mean?

Often (but not always), a projector will denote whether it’s short-throw or long-throw with two letters at the end of the model number, such as the BenQ HT1085ST. The “ST” at the end of the model stands for – you guessed it – “short throw”.

The difference in a projector’s throw distance is decided by the type of lens it uses, with long throws generally being cheaper to build than short throw due to the quality of glass necessary to make them work.

Short Throw vs. Long Throw vs. Ultra-Short Throw

All short or long lens measurements, regardless of brand, are categorized by how much distance the projector needs from the screen to create a 100″ image.

Long throw projectors can require six feet or more of available space between where your projector sits and where the screen is mounted in order to reach the 100″ limit. The upside of long throw lenses (besides the price discount compared to short throws), is they’re perfect for large hall or exhibition space applications, like business presentations or concert visuals. Move them closer however and the image shrinks, making it less useful in projector home theater setups in smaller rooms.

Short throw projectors on the other hand have lenses that can create a much larger picture from shorter distances, or 100″ from about four feet or less in certain models. The first benefit of buying a short throw also happens to be one of the most obvious: less room between the projector and the screen means less room for people to get in the way.

By Chris Stobing

See full Story at www.gadgetreview.com