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Mirrorless Cameras - An Introduction

Mirrorless Cameras are digital cameras that combine the image quality and versatility of professional Digital Single-Lens Reflex cameras (DSLRs) with the mobility of the widely used “point and shoot” digital camera. These kinds of cameras are unlike other digital cameras out there as a mechanism is contained that adjusts the lens effortlessly like the more specialized cameras and as a consequence they're termed as Mirrorless Interchangeable Lens Digital Cameras.

This outcome has been made feasible thanks to a new design that, while keeping the Image Sensor System of DSLRs, and for that reason the quality, it doesn’t have the mirror seen in Reflex Cameras. This makes Mirrorless Cameras streamlined and easily portable, in comparison to conventional DSLR cameras; regrettably, although the size of a mirrorless camera is considerably reduced, the lenses still require a great bit of space, because they cannot be decreased easily while maintaining the superb quality one would expect from this sort of product.

Partial relief for the previously mentioned dilemma arises from the new Micro Four Thirds system, derived from the initial Four Third System adopted by professional DSLR cameras; the micro 4:3 has been designed by Olympus and Panasonic, and it’s one of the standards built particularly for Mirrorless Cameras. This innovative standard allows to minimize the dimensions of the lenses utilized by the camera, without impacting too much on the picture quality. Besides, because it shares most of the specs of the original 4:3 Standard, the "old" SLR Four Third lenses can be used on these new mirrorless cameras through an adapter. This characteristic on it's own is a huge benefit for any professional photographer who already has a good stock of lenses, as they can be reused very easily. Other manufacturers, like Nikon, Minolta, Pentax, FujiFilm, etc., use identical strategies, however centered on a different design.

The viewfinder is yet another attribute of this new type of camera that is worth bringing up. While traditional DSLRs use an optical viewfinder that needs a prism and a mirror this entire element has been removed in the mirrorless camera. In its place is an Electronic Viewfinder (the Panasonic Lumix DMC-G1 and its successor, the DMC-G2, include it). It is just a duplication of the overall performance of the original Viewfinder in that the photographer is able to see the image through the eyes of the sensor as opposed to the lenses just as in the LCD display found on all point and shoot cameras. The upside to the Electronic Viewfinder (EVF) when compared to the LCD display is the fact that several additional features like a histogram and automatic exposure adjustment (very helpful when taking pictures at night) are incorporated. These added bonuses will create some lag in the updating of the image because of the extra processes and also will raise battery consumption. There have been some improvement of these disadvantages in more recent model mirrorless cameras and they will get better with future revisions.

It's worth noting that some manufacturers aimed instead to maximum compactness and eliminated the Viewfinder and the flash altogether from camera's main body; in such cases, these components can be connected when needed. The Samsung NX100 and the Sony Alpha NEX-3, for instance, comply with this design choice.

In my opinion, the lack of a defined standard is still one of the main problems with the mirrorless technology (as it generally happens when a new idea is released), and it could reduce the adoption of these interesting cameras. Nevertheless, this technology is fairly new, and there is room enough for advancement. For individuals who want to try things out themselves, there are already a number of models out there, and several reviews that specify the strengths and weaknesses of each. I'd suggest to read some and see for yourself if the Mirrorless Cameras might meet your requirements.

By: Douglas Artega

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Doug is an IT professional who has always been interested in technology. His discovered Digital Photography when he bought a compact 2MPixels Olympus, followed by a more advanced Canon. He started using a DSLR (Canon EOS 400) in 2007 and recently discovered the new technology of Mirrorless Cameras, which he writes about on his blog.

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