These binoculars are spectacular.Point them at Jupiter and you see a bright dot wandering around in the field of view.Press the image stabilization switch and the planet and its moons instantly become visible.While they can't subtract all movement they do get rid of the little shakes that make hand held viewing so difficult.15x is enough magnification that Saturn is obviously not round.A complaint about earier versions of the Canon IS line was that your finger went to sleep holding the IS switch down.Now you can press it briefly to turn on the IS circuitry which will automatically shut off in 5 minutes.If you press and hold the switch it shuts off as soon as you release it.
I haven't had my pair long enough to comment on battery life but do see a problem changing them when they are mounted on a tripod.Unlike most binoculars where the tripod mounting is at the objective end where the two barrels rotate on the Canons it is at the bottom of the binocular near the center of the tubes which don't rotate.And the battery compartment is just in front of it so you can't get to it if the binoculars are on a tripod of have a quick release plate attached.
Since the lens barrels don't rotate intra-ocular distance is adjusted by actually moving the oculars.They are kind of stiff but that is good because they stay in place once you get them set.
The tripod mount is lower than the highest part of the lens barrels so if you have a big quick release plate like that of the Manfrotto (Bogen) 410 geared head (highly recommended) it presses against the bottom of the barrels and not the flat between them.
For some reason Canon doesn't seem to fell that the objective lenses need any protection as they don't ship lens covers for them.They do provide lens covers for the oculars but they pop off a lot because the eye cups are so soft.It looks like you need something like 69mm lens caps.They don't tell you in the manual but Canon sales says they are threaded to accept 58mm filters so you can buy solar filters for them.
I can use the binoculars with my glasses on due to the 15 mm eye relief but it is really easier to use them without the glasses.
They are heavy, ~2,5#, but if you support them on the heels of your hands very stable.
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Product Description:
Amazon.com Product DescriptionWith its wide 50mm objective lenses and high magnification,these rugged, all-weather Canon Image Stabilizer binoculars are destined to set a new and higher benchmark for image brightness, clarity and ergonomic design.
Leave your tripod at home when you use the new Canon 15x50 binoculars. Canon has once again made its world-renowned optical image stabilizer more convenient to use on this all-weather binocular. With a push of a button, bumpy images are stabilized instantly for maximum viewing. Multicoated ultralow dispersion (UD) objective elements add contrast, clarity, and color fidelity. Housed in a rugged, water-resistant, and slip-free rubber body, these binoculars can be used in rain or shine, whether in a football stadium or on the high seas. Stargazing is also possible with these versatile binoculars. The 15x50 is greatly improved over the previous model, with a larger 50mm objective lens, more convenient operation of the optical image stabilizer, and optional antifog eyepieces. Two AA batteries power the device. Also included in the package are a case, neck strap, and eyepiece covers.
Image Stabilization and More
With any high magnification binoculars, most users will experience frustrating image shake. Unless fixed to a tripod, image shake can render high magnification binoculars useless. Canon's IS technology is remarkably effective at eliminating this problem and is widely used by the television industry with Canon's professional broadcast quality video recording equipment. A special VAP (Vari-Angle Prism) corrective IS system sits between the objective lens group and the porro prism on each side of the binoculars. Within thousandths of a second of the binoculars being moved from their optical axis by vibrations, a detection system activates the IS mechanism. The VAP shape alters to refract or 'bend' the light path by precisely the right amount, thus fully compensating for the vibration. It is this essentially immediate response that effectively suppresses image shake.
Super Spectra Coating
A number of optical factors affect the brightness of an image, including the amount of incidental light that is reflected by the lens. An uncoated lens will refelect away as much as 8% of the incidentail light, significantly dimming the image. Canon's Super Spectra Coating prevents that reflection.
What do the numbers mean?
15x50? 8x25? The two numbers used to describe any pair of binoculars are their magnification - 8x, 12x, 15x and so on - and the diameter of their objective lenses - 25mm, 36mm, 50mm, and so on. The larger the first number is, the larger the object will appear to be in the objective lens. For instance, if you use a 10x lens and look at an object that is 100 yards away, it appears to be the same size as an object located just 10 yards away. The second number, the size of the objective lens, is important because the larger the objective lens, the more light it can admit for brighter, more detailed images, and the better suited they will be for lowlight situations.
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