Celestron X-Cel LX 7 mm - 1.25"

With its 7mm focal length, the X-Cel LX provides high magnification, making it an excellent choice for detailed views of planets like Jupiter and Saturn, resolving lunar craters and rilles, and splitting tight double stars. The 60° field of view also makes it useful for framing smaller, brighter deep-sky objects like the Ring Nebula (M57) or globular clusters.

In a typical 8" (2032mm focal length) SCT, the 7mm eyepiece yields a high magnification of 290x. This is approaching the practical limit for most nights of average seeing but is ideal for resolving fine details on planets and the Moon when atmospheric conditions are stable. The 60° field provides a more comfortable viewing window at this power compared to a standard Plössl.

The 36mm eye relief is a significant advantage for eyeglass wearers, allowing them to comfortably see the entire 60° field. For observers without glasses, this long eye relief can sometimes make it tricky to find the correct eye position. However, the adjustable pop-up eyeguard is designed to solve this by letting you set the optimal distance between your eye and the top lens.

Being parfocal means that all eyepieces in the X-Cel LX series reach focus at the same point. When you switch from the 7mm to another X-Cel LX eyepiece, your telescope will require little to no refocusing. This makes it much faster and more convenient to change magnifications during an observing session.

Yes. The 1.25" barrel of the X-Cel LX 7mm is threaded to accept standard 1.25" astronomy filters. This allows you to easily attach planetary color filters, a moon filter for reducing glare, or light pollution filters to enhance contrast.

The 6-element, 4-group design allows for a well-corrected, flat field of view across the 60° apparent field. This is an improvement over simpler designs like Plössls, especially at higher powers, resulting in sharper stars toward the edge of the field and better control of optical aberrations.