Yep, you can use filters with the Celestron 8mm-24mm Zoom Eyepiece!

It's a great option if you're looking for some adaptability in your stargazing setup. You can smoothly switch between 8mm and 24mm, and it fits any telescope that takes 1.25-inch eyepieces, which the manufacturer notes makes it pretty versatile.

From what we've found, this eyepiece delivers good image clarity even when you crank up the magnification. The fully multi-coated lenses are a plus, boosting light transmission and reducing glare for brighter, more vibrant views.

It also has rubber eye guards and offers comfortable eye relief, which folks say is nice during those extended stargazing sessions.

A cool thing about this eyepiece is that it can take the place of multiple individual eyepieces thanks to its zoom feature. This is handy and can simplify your nights under the stars.

However, be aware that there can be some hiccups, like fitting the eyepiece securely in certain focusers and possible blurriness at specific magnifications. So, it’s smart to double-check that it's a good match for your telescope.

Overall, people seem to really like it for its convenience and versatility.

And if you're into using filters, this eyepiece works with them too. Just make sure your filters are the right size—1.25-inch—and you'll be all set to dive deeper into the universe.

It sounds like there was a bit of mix-up with the initial question. Let's focus on the eye relief for the Celestron 8mm-24mm Zoom Eyepiece.

Eye relief is pretty important, especially if you wear glasses, since it refers to the distance from the eyepiece lens to where your eye needs to be to see the full field of view.

For the Celestron 8mm-24mm Zoom Eyepiece, based on the manufacturer's description, the eye relief changes with magnification settings. When it's at the 24mm setting (which is the lower magnification), the eye relief is about 18mm. This should be comfortable for most folks, even if you're wearing glasses.

As you zoom in, reducing the focal length to around 8mm, the eye relief decreases to about 15mm. It's still quite reasonable but might require a bit of tweaking for glasses wearers.

If using it comfortably with glasses is your main concern, trying it out in person could be helpful if you have the chance. Personal preferences can vary; some people like a bit more eye relief for long viewing sessions, so it might take experimenting to see what works best for you.

All in all, our research shows that the eye relief offered by this eyepiece satisfies many users' needs, thanks to its design features. Its zoom capability lets you easily switch between different magnifications, which is pretty handy for watching things like moving celestial objects or switching between wide views and more detailed looks.

Just remember, it's always a good idea to try different setups to find what feels right for you.

If you're wondering how the image quality stacks up between the Celestron 8mm-24mm Zoom Eyepiece and fixed focal length eyepieces, there are a few things worth considering. The big perk of the Celestron zoom eyepiece is that it covers a range of magnifications between 8mm and 24mm. This means you won't have to juggle different eyepieces during your stargazing sessions, which can be a real convenience. According to the manufacturer's product description, it's made to fit any telescope that takes a 1.25" eyepiece, which is pretty handy.

Based on our research, this zoom eyepiece gets a thumbs up for its fully multi-coated lenses. These are noted for producing sharp and bright images by boosting light transmission and cutting down on glare. Even when you crank up the magnification, the image stays impressively clear.

However, a bit of a quirk is that you'll need to tweak the focus when adjusting the zoom—that's because it's not parfocal, meaning the focus shifts a bit as you zoom in or out.

Fixed focal length eyepieces, on the other hand, usually provide a consistently great image at their specific focal lengths. From what we've found, they tend to have fewer issues with distortion and offer a stable focus, which means less fiddling with adjustments while you're observing. This often results in a clearer view, especially if you like sticking to particular magnifications.

There are a few minor gripes with the Celestron zoom that came up during our research. Some folks mention noticing distortions like "kidney beaning" at certain focal lengths. Plus, it lacks a "click-stop" feature, which might make it a bit less user-friendly without that physical feedback.

It's also a bit on the heavier side, which could throw off balance if you're using a smaller telescope, and the filter threading has been reported as a tad loose by some.

Still, the Celestron zoom eyepiece is a popular pick because it lets you cover all those focal lengths with just one eyepiece, saving you the hassle of swapping them out. It's especially great for those who like to vary their magnifications while looking at the stars.

Sure, there are a few trade-offs in image quality compared to fixed focal length eyepieces, but it offers a lot of convenience and is a solid choice for both beginners and more experienced stargazers.