#STARGUIDER DUAL ED SERIES#

The 20mm and 6mm boast a 66-degree apparent field, while that of the 9mm and 15mm is closer to 70 degrees, despite claimed specs. You can read a thorough review of goldline/redline eyepieces here. These eyepieces are available in 6mm, 9mm, 15mm, and 20mm focal lengths. The “redline” and “goldline” eyepieces have minimal differences optically, but the redlines are a little more well-constructed not to mention looking quite a bit prettier. We recommend picking up the SVBONY version if you are in the US, since it is the cheapest of all. Other trustworthy brands selling these oculars include MEOPTEX, NEEWER, Yosoo, and Omegon. These companies rebranded them under their own names. They are all made by the same OEM manufacturer. They can also be found as Orion Expanse, sporting a blue line rather than gold. Many brands of eyepieces are available, including SVBONY UltraWide, Astromania UltraWide Angle, Agena Astro StarGuider Enhanced UltraWide Angle, and others. They can be recognized by a thin gold or red line just below the eye cup.

#STARGUIDER DUAL ED SERIES#

This series of eyepieces may provide the best possible value in their price range. Here we get into the BMW, Cadillac, Porsche, and Ferrari of eyepieces. 1st Choice: Explore Scientific 82-Degree.This is your Lexus, Acura, and Infinity types that offer more features, better build, and a bit more polish. 1st Choice: Agena Astro Starguider Dual ED.

Think of these as your Ford, Chevy, and Toyota of eyepieces. 2nd Choice: Astromania/BST Planetary Eyepieces.1st Choice: Redline/ Goldline Eyepieces.Note that the price categories are approximate, as prices can vary between retailers. What follows are specific eyepieces that I have tried, own, or have read so many good reports about that I feel very comfortable recommending them. Be aware of the focal ratio of your scope.Įyepieces are standardized, so whatever investment you make today, the eyepieces will continue to serve you in any future scopes you may own.Look at the apparent field of view specs and understand what this means for the field of view.Note that unless you have severe astigmatism, glasses are unnecessary the only effect of severe near- or far-sightedness is a different focus placement than people with good vision, though in more mild cases this effect is negligible. Pay attention to the eye relief, especially if you will be observing with glasses.

Know what diameter eyepieces your scope takes.

The magnification range that is appropriate for your scope.

When selecting the best eyepiece for your telescope, consider: But some people demand the very best, and it is available, at a price. But the difference in price to get to the next level is high, and the performance difference may be small. To get the best performance, you have to be willing to pay the price. Recommendations – The Best Telescope Eyepieces We Know But I think you will feel more confident about your purchases and be less likely to be disappointed if you read through the guide. If you just want the best eyepiece recommendations and don’t care about the details, I’m adding that section right below before we go into the specifications that answer the above questions and make use of the formulas. These are things you will want to know and use.

Exit pupil = telescope focal ratio / focal length of eyepieceĭon’t worry about the math, as it’s simple stuff you can do with any calculator, on paper, or perhaps in your head.

The maximum practical magnification of a telescope is typically 40-60x per inch of aperture, or 1.6-2.5x per mm.

Focal ratio = focal length of telescope / aperture of telescope.

True field of view, or FOV = Apparent field of view (AFOV) of the eyepiece / magnification.

Magnification or power = focal length of telescope / focal length of eyepiece.

How will my telescope’s focal ratio affect my purchases?.

What apparent field of view and eye relief do I want?.

What focal length eyepieces should I buy?.

What diameter eyepieces will my telescope accept?.

So, I am going to organize the guide around five questions and four formulas.Īs we go along, I will refer back to these, so don’t worry if you can’t answer the questions or understand the formulas now. I want to help you select the best eyepieces for your telescope and your budget. Most telescopes come with one or two eyepieces, which gives you one or two magnification options. However, if you want to optimize your viewing experience, you’ll need to invest in a better-quality eyepiece. By having a range of magnifications, you can optimize the image, which means you need more eyepieces.

Starguider dual ed