If the scope has one or more of these eyepieces, it is likely that the images will be marginal to poor. "Beware of telescopes that have eyepieces with any or all of the following markings: H25, H20, H12.5, and SR4. I know you're just getting started, and for one reason or another you may not feel the need to do so just yet, but if you persist with astronomy your viewing may be assisted to some degree by some better eyepieces. No worries - whatever questions you may have, I'm sure you won't be the first (or last) to have them. (some people call the handle of the teapot) for a nice bright Nebula. Next: Point at the middle "star" in the sword of orion. More detail of craters can be found along "The Terminator" the line between bright and dark part of the moon. So another reason to start with the smaller magnification.Įnjoy your scope, you may find the limitations prompting you towards a bigger and better scope and (more especially) better mount, quite quickly once you get hooked. and will provide nothing more than a BIG, but fuzzy blob.Īlso, the higher the magnification, the quicker the target will appear to move through the eyepiece field of view. So the reported 675 zoom claimed is advertising BS. The theoretical best usable magnification is twice your aperture.īut you will need good conditions to be able to focus clearly even for that. So without the barlow or erecting tube (both which increase magnification -3 times and 1.5 times respectively) your eyepieces should give you magnifications of: Magnification is calculated by focal length (900 in your case) divided by eyepiece number. Once centred in the eyepiece you can switch to higher magnification if required. And this is usually the best eyepiece to start with. You should be able to make out craters on the moon with the H20. From what I can gather, your telescope is
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