Meade 1.25" 90-degree Prism Diagonal #918A

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Meade 1.25" Mirror Star Telescope Diagonal

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A 1.25" mirror star diagonal designed for astronomical use
Can be used in your telescope for daytime viewing, but note the image will be reversed left to right (a mirror image)
Accepts any 1.25" telescope eyepiece, and fits into any 1.25" refractor or cassegrain focuser
90-degree angle for comfortable viewing, especially high in the sky
Note: a star diagonal is NOT compatible with a reflector telescope due to the length of the optical path through the diagonal

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Item # 55802

Mfg Model # 07202

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The Meade 1.25" Mirror Star Diagonal diverts the light 90� to the telescope's main tube, permitting a more comfortable viewing position when viewing up into the night sky. A star diagonal is standard equipment with a wide variety of Meade telescope models, including the Advanced Coma-Free LX90, LX200, and LX600 models, but is available here separately as a replacement for any refracting, Mak, or SCT telescope model. Please note a star diagonal cannot be used on a reflector telescope due to the length of the optical path through the diagonal — a reflector will not reach focus when using a diagonal.

When inserted into a refractor or casssegrain telescope, a standard star diagonal will provide an upright image that is reversed left-to-right. If you wish to use this diagonal for distant terrestrial observation with your telescope, it will work (providing an upright image), but keep in mind the image will be mirrored left-to-right.

Warranty

Limited Warranty against defects in materials or workmanship for two years from date of purchase. This warranty is provided by Meade for the benefit of the original retail purchaser only. For complete warranty details contact Meade at 800-626-3233.

Warning

Please note this product was not designed or intended by the manufacturer for use by a child 12 years of age or younger.

Specs

User level

User level

Beginner Level - Suited for a wide range of uses, these products are simple to operate and set up. Some initial assembly may be required depending on the type of product. Optical instruments with this rating will have very good optical and mechanical quality. Great for families, young people, and folks who don't want to mess with equipment and complexity. Beginning level telescopes will show you countless lunar craters, Saturn's rings and a myriad of star clusters and nebulae! Referring to the manual is recommended.

Intermediate Level - These products offer higher performance and more advanced features than Level 1: Beginner models. They typically take a bit longer to learn and need some set-up or adjustments. But anyone with the slightest technical bent will have no problem getting familiar with these models. Referring to the manual is recommended.

Advanced Level - These products provide the best performance but may require more skill to master and appreciate. Optical instruments with this rating have exceptionally fine optics and mechanics. Some are easy to use but might be on the large or heavy side. Some are intended for specialized uses. These products will appeal to the more technically inclined. Referring to the manual is highly recommended.

Intermediate
Design

Design

Different eyepiece designs allow for a wide range of features, depending on the needs of the observer. Orthoscopic and Plossl designs can provide a great quality image with a standard field of view, but may be difficult to use at higher powers while wearing glasses due to the short eye-relief. Long eye-relief designs have more elements and can be more expensive, but work very well with glasses, even at higher powers. Wide angle designs provide a larger view of the sky at the same power as a standard eyepiece. More complex designs can combine all these attributes together in a single eyepiece.

Proprietary
Barrel size

1.25"
Coatings

Coatings

Binocular lenses and prisms are often coated with anti-reflective material to minimize light loss as light travels through the multiple optical surfaces of a typical binocular. Coatings help maximize the amount of light transmitted through each glass surface of a binocular, so as much light as possible reaches the observer's eyes to provide a bright and sharp image.
Good lenses are at least "fully coated," with a single layer of magnesium fluoride coating applied to each air-to-glass lens surface. Multiple layers of coatings are even more effective; the term "multi-coated" means one or more air-to-glass lens surface has multiple coatings. "Fully multi-coated" optics are even better, meaning all lens surfaces have multiple layers of anti-reflective coatings applied for maximum light transmission and optimal image quality.

Fully coated
Filter threads

Yes
Parfocal

Parfocal

Parfocal refers to an attribute of an eyepiece set where little to no focusing is required when swapping out one eyepiece for another.

No
Barrel security recess

Barrel security recess

The barrel security recess is a shallow groove or depression cut into the 1.25" or 2" barrel of the eyepiece. In the event the thumb screw holding the eyepiece in the focuser becomes slightly loose, the eyepiece will not fall out because the tip of the thumb screw will catch on the lip of the security groove.

Yes
Blackened lens edges

Blackened lens edges

Blackened lens edges in eyepieces and refractor lenses prevent unwanted light scatter inside the tube. This results in higher image contrast.

No
Rubber eyeguards

No
Body material

Plastic
Case

No
Weight (oz.)

8
Dimensions

6.0 in. x 4.0 in.
Additional included accessories
Other features
Warranty

Warranty

This warranty gives you specific legal rights. It is not intended to remove or restrict your other legal rights under applicable local consumer law; your state or national statutory consumer rights governing the sale of consumer goods remain fully applicable.

Two year

Shipping Info

Orders received by 1pm Eastern Standard Time for in-stock items ship the same business day. Order received after noon will ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.

SHIPPING RESTRICTIONS APPLY FOR THIS PRODUCT

This product is available to ship Standard delivery within the 50 US states. Delivery is not available to US territories/protectorates or APO/DPO/FPO addresses. Delivery is available to Canada.

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