Difference Between Similar Terms and Objects

Difference Between EOS and SLR


EOS and SLR are the most commonly heard acronyms in the field of photography. “SLR” stands for “Single Lens Reflex” which refers to a mechanism wherein a single lens is used for both viewing and taking pictures. The term EOS was introduced by Canon which symbolizes that the camera is for both film and SLRs. In short, all EOS cameras are SLRs.

“EOS” stands for “Electro-Optical System” which became a brand name introduced by Canon, a leading camera and lens manufacturer in the world. The EOS was introduced to incorporate an auto focusing feature into the camera.

The battery life of SLR cameras are outstanding as the basic SLR camera offers 300+ shots on a single battery charge. These days, only digital SLR cameras are available as the film SLRs are no longer being made. Nikon manufactures only two film SLRs, FM10 and Nikon 6 while Canon no longer manufactures film SLRs both in basic and high-end models.

The EOS was introduced in the year 1989 and was first called EOS-1 where the number “1” represented the uncompromising quality. Since its development, EOS has focused on achieving top-class performance and reliability. EOS-1 intended to be the definitive professional SLR camera aiming to be the ultimate professional tool offering quick and easy operation as well as high-image quality.

The field of photography encompasses a broad spectrum of picture-taking genres. Each enthusiast has his own unique picture-taking style. Professional cameras must be designed so that it gets adapted to different kinds of photography needs with the ability to shoot various objects in extreme climatic conditions. An SLR camera has the ability to operate smoothly at extreme temperatures of -20 degrees Fahrenheit to 140 degrees Fahrenheit.


1. “EOS” stands for “Electro-Optical System” introduced by Canon where as “SLR”

stands for “Single Lens Reflex.”

2. EOS symbolizes both film and digital SLRs.

3. All EOS cameras are SLRs, but not all SLRs are an EOS.

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