2 inch 26mm Super-Plossl Telescope Eyepiece

Description

This is a very popular focal length / Mid-Power eyepiece that I made as a budget eyepiece using the same lenses that are found in eyepieces with the smaller diameter 1.25" barrels. The original eyepieces use the larger diameter lenses, but the manufacturers placed them above the smaller 1.25" barrel because the 1.25" is a more popular size. The smaller 1.25" barrel chokes the afov down so much ( below about 28mm ) that they simply don't perform as well as using the same lenses in a 2 inch barrel.
This 26mm was built using a standard Meade 26mm super-plossl with the hopes it would improve the performance by widening the afov in the larger 2 inch barrel. The eyepiece performs just fine, but I honestly don't see a big improvement over the 1.25" version. So, the 2 inch barrel does make it a bit nicer and allows the use of the 48mm filters, there was not a big change in the AFOV.
Russell Optics puts them into a 2 inch housing to make this budget 26mm Super- Plossl  with  18mm eye relief and is threaded for standard 2 inch filters.  The lenses are coated with anti-reflective material to reduce glare and stray light, but at the same time allowing as much light through as possible. This yields a brighter image in smaller telescope ( up to 8 inch diameter ).   When the lenses are in the larger housing and 2 inch barrel it opens up the afov drastically to 55 degrees afov making it a much better performer. This is by far the least expensive way to build a low-power, budget-minded 2 inch eyepiece using all new components. These make great star-party eyepieces, and a great gift idea for that budding astronomer on a budget.
*Please note.....on Telescopes with a central obstruction ( Like SCT's, Maksutov's, or Newtonians ) a basic rule of thumb is to keep the magnification above about 35x. Once you go below 35x you stand a chance of losing contrast. If your obstruction is larger than 25% of the primary you could also get a "ghost" image of that secondary mirror.
If you have any questions or concerns I will gladly help you make the correct choice for your particular choice. Since Ebay no longer allows phone numbers or addresses in the ads ( I have NO idea how all the others are getting away with it ) You can get a hold of me at Russell Optics & Machine in Arizona , or try clicking the blue & red "ME" link next to our feedback.
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