Not bad. I picked up this kit to replace the eyepieces that came with my Celestron 130 SLT telescope. They'll fit into any scope that has a 1.25 socket or adapter. The views are pretty clear and 52 degrees wide. The 5 eyepieces will double with the use of a barlow but you might not find much use for a barlowed 6.5 (might be too much magnification). The moon filter is pretty good and knocks a lot of the brightness down. The other filters don't do much other than change the color. It's supposed to make some things easier to see but I prefer it without them. The case is decent and has a little more room for other stuff. I store my laser collimator in there as well. If you figure the barlow is worth $30, the moon filter $15, and the case $20, you're paying about $17 per eyepiece for superplossls. I wouldn't count the filters as they're not really of much use.Another thing to consider when buying a set is the eyepiece magnifications. They may not be right for your scope. The minimum magnification (higher mm number means lower magnification) would be the exit pupil size times the focal length of your telescope. Most people use 7 as a typical exit pupil size but it gets smaller with age (5 at 80 years old). So for an f/5 telescope, the minimum magnification would be 7*5 or 35mm. So for an f/5 scope, the 40mm eyepiece is too low of a magnification. It results in an object getting too small and dimmer because the light is wasted (bigger than you pupil can take in). The maximum magnification would be the f ratio of the scope (in the case above, 5mm). If the magnification is stronger, you'll only be magnifying blurriness (Dawes limit). You won't get more detail.
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