Tried the EE-1 for the first time with my 150–600 (the push/pull method on “S” works very well for birds in flight) and was impressed by how quickly it improved my ability to track birds with a long telephoto. Setup took about 20 seconds, just mounted it, adjusted a couple of knobs to sight it in at around 400mm, and was done. Despite what I’d read online, I didn’t have to re-zero it for different focal lengths; it stayed aligned at 300mm, 400mm, and 600mm. Out in the field, the improvement was noticeable right away. Even in poor evening light, I was able to center fast-moving birds I’ve struggled with before, doves flushing over trees, a large egret/heron taking off unexpectedly, and even distant aircraft I used to test the tracking. Before this, I often ended up “spraying and praying,” but with the EE-1 the subject appeared in frame much more consistently when I raised the camera. For anyone who has difficulty getting fast birds or erratic subjects into frame with long lenses, the EE-1 is a very useful tool. It’s straightforward, accurate, intuitive, and makes target acquisition and framing noticeably easier. I’m glad I finally gave it a try.

I bought this for birds in flight and have not been disappointed. It's compact, easy to stow in any bag and quick to setup one you get the hang of it. Just use live view and place the camera on any stable surface or tripod to dial in the red dot. Takes 3 minutes. Worked great wroth the 300 F4 Pro at Bosque del Apache.

With Dot Sight technology my photography is enhanced substantially because it uses pinpoint accuracy on the subject before a photograph is taken so that the subject field is in range and on target. This is very important when taking photogtaphs of distant objects such as flying jets , fast cars, aircraft, distant buildings etc. Dot sight technology increases the photographic accuracy and quality of the image.

I have a SP 100 dot sight. I took a pic of the moon from a moving cruise departing from Italy... I wish you could see it! This is a very nice addition to your equipment.

Trying to track a bird in flight and keep it in the frame when zoomed out to 300mm is extremely difficult, but with the EE-1 Dot Sight it is much easier to do so and I can keep both eyes to boot. As mentioned in other reviews, it is easy to set up and center the dot using two thumb wheels. ( One for up & down and one for right to left.) I also appreciate the thumb wheel that allows you to tighten it in the hot shoe. It is a valuable feature. I once lost a very expensive GPS logger because a slight bump knocked it out of the hot shoe. Although the outside is made of plastic, the side struts and the base they are connected to inside the unit are metal. It actually has a pretty solid feel to it, especially when closed. Just be sure to close it down before putting it in your camera bag or pocket. The only reason I didn't rate it five stars is that if I try to use it while wearing glasses, sometime the lens of my glasses rub against the top portion of the case and knock the dot off center. Same if you wear a hat.

It is a good concept, an excellent design. Easy to use and calibrate. However, it could had been made of aluminum or other kind of metal for it's price. The reason I graded this DOT Sight for three stars is just too expensive and made of plastic. Pairing with my EM-1 and a 40-150 mm F 2.8 Pro (mostly metals) could had been perfect if this EE-1 is not made of PLASTIC.

The red dot concept is a well proven technique using ONLY ONE POINT. The optical design is ingenious, always keeping the red dot on the line between your eye and the target. This eliminates the need for precise positioning of the eye. If you move your head and eye enough for the red dot to disappear you are still on target as long as you have not moved the camera.

I bought the Electronic Dot Site to use with my Olympus Stylus 1s, which is among the finest cameras I've ever used. When the !s is set for around 300mm, as with nearly every camera, neither the LCD or the EVF is fast enough to track moving birds, running animals, or even fast moving, zigzagging racing sailboats as they move across the starting line. I've used my EE-1 for all of these purposes, both on my Stylus 1s and one of the best selling pro cameras from another manufacturer. It's easy to use and equally equally effective in bright sunlight when all LCD are washed out and difficult to use; or doing street shooting a night by the light of a street light about a block away. I wouldn't be without the EE-1, regardless of the cameras I happen to buy in the future.

I gave this product 5 stars because it does what its supposed to do. It helped me track airplanes and birds. It made it easier to do with the OMD EM-5 and the 14-150 lens because I could center the objects or place them where I wanted them in the composition without holding the eyepiece to my face. I like that. I could track them easier because it magnifies the image. It might result in less cropping. Can you use the LCD for this? Yes, but not with bright light at your back washing it out. Its harder to do with the LCD or the EVF with a distant object because they do not magnify the object, but the EE-1 does. Magnification makes it easier. I think I like this device. Have to gain experience with it. Will try it for photographing auto racing. A self contained, self powered device that does not need to communicate with the camera, it seems like it will work with any camera, even a film camera. May interfere with your Cap/Hat. Its a little bulky.

This sight is one among many others available, mainly for guns, which exploit a sound and well established principle. A small light emitting diode is reflected from the surface of a partially silvered curved mirror - actually, one side of a glass lens. This has the effect of superimposing a red dot on the scene viewed through the lens. As the diode is placed at the focal point of the curved lens surface, the red dot appears to your eye to be at infinity. Although the dot appears to move about in the lens when you move your head, it actually remains centred over the image of the distant object which you originally aimed at. Thus it is the perfect wide-angle sight and does not require you to squint across and line up with two elements of a conventional rifle sight. If you can see the red dot, then you know instantly where your camera is pointing. Some intitial adjustment is required to synchronise the position of the dot with the image seen by the camera lens but, once this is done, no further adjustments are required. There is a small parallax error which is equal to the distance between the centre of the sight and the axis of the camera lens, just a few inches and this remains constant no matter how near or far the object is. So please do not be put off by ignorant statements by people who do not know what they are talking about.