"Excellent performance in an inexpensive package. Reviewing our 20mm 1.25-inch SWA eyepiece on Cloudy Nights, Nathan Melendez concluded: See why Erik Wilcox, reviewing the Agena SWA 2-inch eyepieces for Astronomy Technology Today magazine, said:Īll these three eyepieces offer a great value, with a lot of "bang for the buck." Agena AstroProducts has really raised the bar with this line, and in the under $100 category, I feel that it would be difficult to find another line of 2-inch eyepieces that offer better performance for the price. Sold on other sites under different brand names for a lot more.
All models are parfocal, reducing the need to refocus every time you change eyepieces Light in weight for their size, making for easier scope balancing Sleek black barrel with safety undercut to reduce the possibility of the eyepiece slipping out of the focuser or diagonal Fold-down rubber eyecups, rubber grip rings for comfort and safety Blackened lens edges, anti-reflection threads for maximum contrast Super sharp, with excellent aberration correction and extremely high resolution rivaling higher-priced eyepieces. 70 degree apparent field of view, for that immersed in space feeling With features like a super wide angle 70 degrees FOV, five elements of fully-multi-coated high-index glass, beautiful black anodized body and barrel, the Agena SWAs are as close as you can get. Looking for $400 performance in an under-$100 eyepiece? Then you can look no further. Each comes with lens caps, original box, and a bolt case. It works great now.I have two Agena Astro SWA EPs for sale. Saved me from buying another Cheshire with out the crosshairs. I found that I had to back out the screw I put in by about a 1/32 turn. When I put the screw back in inially I tightened it down to the same level as the other two push screws. I found a post on the internet that said just unscrew the crosshair piece and it would work much better. I tried it but was having a hard time seeing the donut becuase of the crosshairs in the eyepiece. I bought the Agena Cheshire Collimation Eyepiece to check and make sure that it was still collimated. When I got it one of the push screws in the lens cell had fallen out inside the dew shield. I bought a ES AR152 6" refractor about a month ago. Quality Lenses,Easy to Use,Accurate,Lightweight,Strong Construction,Compact Cons: This will have no impact on its performance.ĥ.0 Cheshire Collimation Eyepiece and ES AR1 Pros: This is a manufacturing artifact and not a defect. You may notice a small dimple on the angled silver plate.It will be of no use with fixed cell objectives that cannot be adjusted. I somehow lost the two screws that will hold the guide camera in the scope. This item can only be used if your refractor telescope cell has a push-pull or other mechanism to adjust the lens elements. Added a bracket and guide scope to the RedCat today.Use of this item assumes that your focuser is aligned properly with your telescope tube.This Cheshire eyepiece fits in 1.25" focusers or in 2"-1.25" adapters. As with most other telescope collimation/alignment procedures, use of this accessory requires patience and experience.
The dual images can sometimes be hard to see (especially in very bright or very faint light) but you will see them. No additional instructions are included with this product, but you can easily find additional information about Cheshire eyepieces and their use on the internet. Thats it! With precise collimation, your refractor telescope will deliver the best image it can. Adjust the objective cell's push-pull bolts until the small circles merge into one. You will see one or more small faint circles (usually overlapping) near the center. Look into the small opening at the top of the eyepiece. Use natural daylight or shine a flashlight into the side opening with the 45-deg angled silver plate. To use this eyepiece, simply cap the telescope, remove the diagonal, and place the eyepiece directly in the focuser. Is collimating your refractor a real chore? Collimating your refractor is quick and easy when you use this 1.25" Cheshire collimating eyepiece.
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