Celestron 93421 X-Cel LX Series 1.25 inch / 5mm Eyepiece, Black

I purchased the 25mm through Amazon. Easy to use, not too fussy about eye position, good sharpness across field of view. I have never used really high end eyepieces so cannot compare to those but this is a step up from basic eyepieces and offers better field of view than plossls.I am using the X-Cel LXs in a C11 with a focal reducer attached i.e. 1800mm focal length and f6.3.I also have the 18mm, 12mm and 9mm versions of this eyepiece. The only issue I have is that the rubber ring at the top of the 12mm came off - this is a known issue with these eyepieces, caused in part by the cap being pretty tight. Was easily solved by gluing the rubber ring back on with superglue. The 25mm has had most use and the rubber ring has been fine on that. The lenses are advertised as parfocal i.e. requiring little or no refocusing when you swap from one focal length to another. I guess "little" is subjective but my set definitely require refocusing when swapped and more than just a little in my opinion.Despite these minor issues I am extremely happy with these lenses and the 25mm in particular.

So impressed I also have Pentax 3.5 eyepieces I can't get over how much zoom they actually have just as the sun was going down could pick out a person pitching a tent to do a spot of night fishing about 2 1/2 miles away Massey well worth the money and well done celestron really recommend these 7 mm eyepieces you will not be disappointed

I like this eyepiece I have 2 cheaper 9 and 10mm eyepieces and u can really see the difference in quality both in bild quality and in use probably some off the sharpest views iv seen.doing some research on YouTube people are saying the explore sciencentifc are better iv bought one in a 4.5mm so we will see when it arrives but I'm very happy with.

Solid and seems well made. Better than other 7mm plossl low cost lenses. Good eye relief. Compared to similar priced Seben 8mm to 24mm zoom find that the Seben is slightly sharper which surprised me being that the Seben is a zoom and would expect slight distortion - (includes using Seben with 2x barlow with zoom set at 14mm so matching the 7mm). May be conditional on the object viewed and atmospheric conditions. All in all better than standard plossl low cost eyepieces but would question against similar priced similar spec manufacturers - updated review - found this really comes into it's own for lunar and some planetary viewing so increased the rating!

Really good quality eyepiece for my new telescope. Thank you.

I ordered this eyepiece based on the reviews and because I wanted a quality EP which would give me good eye relief. When the eyepiece arrived I was pleased to see that looked and felt like a quality piece of kit. It has a comfortable weighty feel and when I inserted it into my 80mm Skywatcher ST refractor I could clearly see that the image (in daylight) was crisp with very little CA and decent edge sharpness.So why only three stars? Because, apart from the overall sharpness of the optics, I could clearly make out some translucent debris at the edge of the field of view. I rotated the EP in the scope and the debris moved round in a circle indicating that it was in the EP and not the scope. Worse still, as I rotated the EP several particles of dirt, grit or perhaps paint flecks became visible and also rotated. I used my rocket blower to clean the outer surfaces of the EP and re-tested. Sure enough the particles were still visible and still rotated.I did consider keeping the eyepiece, after all I would be using it mostly at night, but let's be honest, why should I accept an eyepiece costing £60 which is contaminated with dirt? Also I've had experience of another celestron eyepiece which came with my SLT 127 Mak which had a lump of glue stuck to the bottom lens element! On that occasion I gave the EP away because I knew I would be upgrading very soon anyway.So bottom line - I've returned the EP for full refund and I will probably invest in a similar spec. Skywatcher EP. It's a shame that Celestron do not seem to have a good grip on their quality control processes.

I chose the the 18mm eyepiece as it gives good magnification for deep sky objects such as galaxies and planetary nebulae. My new telescope is a Celestron NexStar SLT 127mm. It has a focal length of 1500mm, so the magnification is 1500 divided by 18 = 83 times. The eyepiece is much better than the two standard eyepieces that came with the scope, both in field size, ( difficult to judge as the two that came were 25 & 9 mm.)and also field clarity, ( more easily judged.) I live in the north of Scotland where we are blessed with little light polution, however at this time of year, June, the skies never get dark. Despite this the 18mm eyepiece works well at spliting double stars i was particularly pleased to split Polaris, it has a fairly wide seperation of 18.4 seconds of an arc but the primary is very bright 2.0, and the companion dim 9.0. As the experience has been so good i intend to buy the entire range of Celestron X-Cel eyepieces over the next few years, without going below 5mm, ( my telescopes 300 times magnification limit ) making the 12mm eyepiece my next purchace. Philips " Stargazing with a Telescope " by Robin Scagell, says : "Top of the accessories list is extra eyepieces." I recommend the 18mm X-Cel LX Eyepiece.I bought the eyepiece from Amazon. It arrived promptly despite my remote UK location. Amazon are one off very few companies that do not add hefty postage charges to the Highlands and Islands of Scotland.

Now that i have it I would not do with out it.This celestron 12mm eyepiece is essential in my opinion for anyonewho has a Celestron S.C.T. astro telescope.It is an excellent mid order between high and low power eyepiece.The definition and clarity is superb with generous eye relief.X-CEL LX SERIES 12mm are worth considering.