Orion 12.5mm Illuminated Reticle Plossl Eyepiece - 1.25"The 12.5mm Orion Illuminated Plossl Telescope Eyepiece is great for accurate polar alignment. The 4-element Plossl design is also well suited for off-axis guiders, where light gathering is minimal. Fully multi-coated lenses, 4-deg apparent field. LED-illuminated double crossline reticle has adjustable focus and brightness. SR-44 batteries included. 1.25" diameter.
Orion 12.5mm Illuminated 1.25" Plossl Eyepiece Features
- Four-element 12.5mm focal length 1.25" Plossl telescope eyepiece with an illuminated double crossline reticle
- Excellent for accurate polar alignment, GoTo system alignment, IntelliScope system alignment, and acquiring and centering of guide stars for guided astrophotography pursuits
- Fully multi-coated lenses provide bright views with a 4-degree apparent field of view
- LED-illuminated double crossline reticle has adjustable focus and brightness
- Illuminator requires SR-44 batteries (included)
|Dust Caps Included||Yes|
|Eye Guard Included||Yes|
|Eyepiece Apparent FOV||40 degrees|
|Eyepiece Eye Relief||5mm|
|Eyepiece Focal Length||12.5mm|
|Eyepiece Special Feature||Illuminated|
|Lens Elements & Groups||4 elements|
|Warranty||1 Year Warranty|
Great for Centering but...
The double cross reticle pattern is very useful for centering your scope during Star Alignment actions. But this eyepiece has a few issues, too... 1 The 40deg FOV is quite narrow, combined with the magnification of 12.5mm. This can be a challenge when moving from the wide field of a finderscope. 2 There is no eyecup, and the eyelens is nearly flush to the exterior. This means glare from any external sources must be shaded away with your hand - while also trying to use your hand-controller to center your scope. 3 Focusing the reticle is done by helical means of the eyelens element. As you twist this outward, it quickly begins to get rather loose and wiggly in its threads - and there is no stop before it comes lose in your hand. All that aside, once you have your target within the FOV, the illuminated thin-lined double-cross reticle makes it quite clear where to center your scope.