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Projector Notes and Updates

Highly Rated Sony VPL-DX221 Projector for Business & Classrooms Features a 10,000 Hour Lamp

Posted by George Spoleto on

The highly affordable Sony VPL-DX221 classroom and meeting room projector, released 17 months ago, now (in January 2019) ranks as one the top XGA class projectors for schools and businesses. The VPL-DX221 is attractive because it combines ease of use, excellent picture quality and low ownership costs, including a long life lamp. XGA (1024 x 768) resolution provides plenty of fine detail; useful for making presentations direct from a laptop or tablet. Designed as a light weight, workhorse projector, the VPL-DX221 offers 2800 lumens of brightness and a 4,000:1 contrast ratio, sufficient to produce clear images in rooms with some...

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"OEM" - The Smoke and Mirrors of Projector Lamp Module Sales

Posted by George Spoleto on

The language being used to describe the replacement light source for digital projectors is a case study in sales talk often meant to confuse rather than clarify. Here is an example from the web site of a reseller: “We carry 4 versions of the Optoma EW531 Lamp. There are 3 OEM versions: the OEM lamp directly from the bulb manufacturer of the original lamp included with this projector, the same OEM lamp sold by Optoma, and an OEM compatible version from another OEM bulb manufacturer, but not the original manufacturer for this model. We also sell an economically priced compatible...

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Footlamberts: What and Why?

Posted by George Spoleto on

A footlambert (or foot-lambert) is a unit of luminance. It is used primarily in the projection industry to provide a value for luminance of images on a projection screen. 1 footlambert (fL) is equal to 3.43 candela per square meter (cd/m2). When the footlambert value is known for a projection system (the projector and a screen), assumptions can be made about the clarity of images when viewed with varying ambient light levels in a room. To calculate the footlamberts on a screen you need the following units: Projector Lumens Screen Gain Screen Width Screen Height Use online calculators to get...

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Laser vs. Lamp Projectors: What to Consider When Making a Purchase Decision

Posted by George Spoleto on

With an increase in the number of laser projectors on the market, everyone from industry professionals to armchair bloggers seem to be weighing in on the pros and cons of laser versus lamp digital projection. With 2019 here, it seems like a good time to compare the specs, review the arguments, and attempt to provide a basic decision guide for anyone buying a projector for commercial or institutional applications. Compare The Specs Light Source Rated Life Lamp:3000 to 5000 hours at full power (5000 to 8000 hours at eco, reduced power). Replacement lamps are available. Laser: 16,000 to 20,000 hours...

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Sony VPL-EW575 Compact Projector Offers High Brightness For Conference Room Presentations

Posted by George Spoleto on

The Sony VPL-EW575, a compact desktop projector designed for conference room applications, provides exceptional brightness and contrast to meet the needs of business presentations. Released in May 2017, this WXGA, 1280x800 projector produces 4300 lumens (2400 lumens in ECO mode) for strong image clarity even with ambient light in the room. The VPL-EW575 includes a color/white balance setting that allows tweaking for crisper images and enhanced color rendition. In addition the VPL-EW578 connectivity options support HDBaseT with dual HDMI ports and Direct USB Display connection. Both networked and wireless presentations are possible with PC or Mac. Other specifications include: Display...

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