The 9mm Meade 100° field Extra Wide Angle eyepiece provides spectacular wide field/high to medium power images with telescopes having focal ratios as fast as f/4. It is superb with fast f/ratio reflectors, such as Dobsonians, giving you both an immense field and a good 2mm exit pupil with the typical f/4.5 Dob that is very effective at darkening the sky background so that faint stars and diffuse objects pop out more clearly.
Its very wide field also makes it convenient for moderate power lunar and planetary observing with Dobsonians, as you have much longer to observe before the planet drifts out of the field and the scope has to be repositioned. That said, it is worth noting that the new 100° 9mm Meade Extra Wide Angle is marvelous for open clusters, nebulas, galaxy clusters, and globular clusters with any telescope capable of using a 2” eyepiece.
The 100° apparent field of this new 9mm Meade Extra Wide Angle eyepiece is nearly 50% larger in area than an 82° field eyepiece. You can use the field of view calculator below to see just how much sky the 9mm Meade Extra Wide Angle can reveal with your telescope.
The 9mm Meade Extra Wide Angle has high contrast, comfortable eye relief, and full field sharpness – with well-controlled astigmatism, field curvature, and lateral color. This 9mm Meade fits 2" focusers only. It is parfocal with the other Meade Extra Wide Field 2” eyepieces.
There is a soft rolldown eyecup to shield your eye from ambient light (from a neighbor’s security light, for example) and improve the image contrast. At an eye relief of 12mm, the 9mm Meade Extra Wide Angle would normally somewhat vignette the field of view for eyeglass wearers. However, since the 100° field is so wide that you can’t see the full field without having to move your head from side to side to take it all in anyway, vignetting in the conventional sense is not a problem.
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