Telescopes & Binoculars Binoculars User Manual

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INSTRUCTION MANUAL

IN 276 Rev. D 03/10

Orion

BinoViewer

#52071

Congratulations on your purchase of a quality Orion

BinoViewer.

The binoviewer provides superior contrast and

detail for planetary, lunar, and even solar vistas. If you are try-

ing to tease out extra features on Saturn or the craters on the

Moon, the binoviewer will deliver the view in 3D-like majesty

unavailable with monocular vision. Planets will appear less like

flat discs, and more like floating spheres. The lunar landscape

will look like it is flying underneath the window of your space-

craft. All this in greater viewing comfort, since you won’t have

to strain to close one eye.

The binoviewer will work on any telescope with approximately

4" of inward focus travel. If your telescope has less focus travel,

you can use the included 2x barlow lens with the binoviewer;

this combination only requires approximately 1.5” inward focus

travel.

How to Use the BinoViewer

First, take the binoviewer out of its case and remove the cover

caps. The eyepiece holder uses a single thumbscrew and a

compression ring to ensure the eyepieces are centered in the

eyepiece holder. This is important to achieve a sharper, merged

image, especially at high magnifications. The eyepieces must

be identical to get a clear image. After inserting the eyepieces,

secure the thumbscrew and bring the binoviewer to the focuser

of your telescope.

Connection to the Telescope

Before inserting the binoviewer into the focuser, make sure

any adapters or diagonals in the drawtube are secure. The

binoviewer weighs much more than an average eyepiece,

therefore all connections must be extra secure to support it.

Place the binoviewer’s chrome barrel into your star diago-

nal (if using a refractor or Cassegrain) or focuser (if using a

Newtonian) and secure it with the thumbscrew. Now, adjust

the interpupillary distance of the two eyepieces. Adjust the

binoviewer so the center of each eyepiece glass is directly in

front of each of your pupils. This is done by grasping both sides

of the binoviewer and bending them together or apart. When

the image from each eyepiece becomes a single merged

image, the interpupillary distance is set for your eyes. You may

also rotate the entire unit in the focuser so your neck is at a

comfortable angle.

Focusing

Now you are ready to focus. First focus with your telescope

focuser. If the image looks a little soft, you can adjust the focus

of each eye individually with the helical focusers at the base of

each eyepiece holder. Cover your right eye and focus the left

eyepiece holder by rotating it until the image appears clearest.

Then cover your left eye and do the same for the right eyepiece

holder. The binoviewer is now focused.

If you rack the focuser all the way inward, and still can’t achieve

focus, the included 2X barlow lens threaded onto the front of

the binoviewer's barrel will usually solve this problem. This will

likely occur in Newtonian reflectors and some refractors, but

rarely in Cassegrain telescope designs.

Image Orientation

As the light travels through the binoviewer, the image will be

rotated 180°. If you observe a mountain scene through the

binoviewer, the sky will be on the bottom of the image, and

the mountains will float on top. However, this image rotation is

hardly noticeable when viewing the night sky.

Use of the 2x Barlow Lens

As an extra bonus, the Orion binoviewer comes standard with

a high-quality 2x barlow lens. This lens threads onto the front of

the binoviewer’s chrome barrel, and doubles the magnification

of any eyepieces used in the binoviewer. As noted previously, it

also reduces the amount of inward focus travel required for the

binoviewer to reach focus in a telescope.

Keep in mind, however, that when the barlow lens is employed,

the field of view and image brightness will be reduced. This is

fine for viewing objects such as planets, as they are small yet

quite bright. On the other hand, some deep sky objects, such

as nebulae, can be dim and wide, so using the barlow lens

might not yield the best view.

Using Filters

Your binoviewer’s chrome barrel is threaded for Orion 1.25"

filters. Simply thread the filter onto the barrel and re-focus.

The binoviewer’s excellent lunar and planetary views can be

further enhanced by color filters such as light blue, yellow, or

red, and the classic Moon filter to block excessive glare. Since

the binoviewer works best for brighter objects, a light pollution

filter may only work on the brightest deep space objects. A

broadband filter, such as the Orion SkyGlow, may improve the

contrast and eliminate distracting haze from city lights.

Summary of content (2 pages)

PAGE 1
instruction Manual Orion BinoViewer ® #52071 binoviewer so the center of each eyepiece glass is directly in front of each of your pupils. This is done by grasping both sides of the binoviewer and bending them together or apart. When the image from each eyepiece becomes a single merged image, the interpupillary distance is set for your eyes. You may also rotate the entire unit in the focuser so your neck is at a comfortable angle. Focusing Now you are ready to focus.
PAGE 2
The barlow lens also accepts filters. Simply thread them onto the front of the barlow lens when it is installed on the binoviewer. Solar Observing Your binoviewer reveals copious detail on our nearest star, the Sun. A white light solar filter placed on the front aperture of your telescope will provide a safe view of the Sun accentuated by the binoviewer. These views are best enjoyed at medium power, from 50 to 100X.