Colorcast veteran close your eyes12/27/2023 ![]() In a wider view.and that gives what seems to be a more detailed surface. It also concentrates your optic cortex and keeps your eye from "dithering" to take I actually like narrow fields as it makes a small planet feel larger to me. The mathematics would tend to support that. It doesn't seem to have anyĭiffracting effects like the aperture. People zoom power, but it's fun to adjust the field. Sharpness seemed excellent, even an improvement in center sharpness, at 45-50 degrees,īut I suspect that was a consequence of the contrast.the effect on edge-detection. things actually got a bit messy at 30 degrees. Sharpness was good throughout, but contrast increased a bit on the wayĭown to 50 degrees, then steadied. I was able to evaluate contrast and sharpness at 65-afov, 55, 50, 45, and 30. Not all eyepiecesĬut off at the image plane.that's no big deal. You do get a crisp edge and jet-black surroundings. When the field stop is at or near the image plane, I recently fitted an all-glass 65-degree aspheric with an adjustable irisĪt the image plane. In particular for planetary viewing, I actually like narrow fields as it makes a small planet feel larger to me. The HD60s are probably the best all around, but not the best at any one thing.īut for the things I want a 300x-ish eyepiece for- planetary viewing, splitting doubles, examining some small feature- the difference in the field of view on these three types of eyepieces doesn't even enter into the equation. The Vixen LERs are the most comfortable, but they seem to have a warmish color cast to them that I don't like, and they are a bit dimmer. The orthos are the sharpest (by a slight margin), but the least comfortable for viewing due to the short eye relief. I also have Vixen Lanthanum Long Eye Relief eyepieces in roughly those focal lengths. I also happen to have the 6.5mm HD-60 and Meade Research Grade 7mm ortho (which would be similar levels of magnification, given that I'm using them on a C8 rather than a C11). But I have a 12mm Meade HD-60 (a 60 degree eyepiece with longer eye relief- attributes similar to a Radian) and a 12.5mm ortho. I'm not sure exactly what you are asking, and I haven't looked through either of those specific eyepieces. 82-degree fields are cool, but I find accommodating the entire field impossible. I have trouble taking in the entire field of most 68-70 degree AFOV eyepieces (at least the ones I've tried). I personally find 50-degree-ish fields satisfying enough, and don't find them constricting. As to the degree that image circle dominates the field of view, that seems to be somewhat variable from person to person. At the same (or close enough) focal length, the eyepieces should show roughly the same image scale- the wider eyepiece will just show you a larger image circle.
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