I’m planning to go to a rural spot that has a Bortle class 3 night sky around Southern California. Can anyone recommend a beginner friendly telescope with decent magnification for around $200? I’m not interested in using an accompanying smart phone app to go with it either. I’d like to see nebulae and galaxies the most. Thank you.
Okay, so here’s my recommendation:
Do NOT buy a $200 telescope new. You’re going to overpay to get a piece of kit that’s okay at best and unpleasant to use at worst (possibly due to uncomfortable eyepieces, difficulty in actually using the scope with bad alt/az controls, bad ergonomics with the stand, etc).
If you want a cheap scope just to find out if you’ll like amateur astronomy: Go hit some garage sales or a resell app or Craigslist or something, but I particularly recommend garage sales. There’s plenty of these cheap ‘hobby killer’ telescopes that can be had for a fraction of their retail price this way, and the resell value is a little more reflective of what they’re actually worth.
Alternatively: drop about 1/4 of that on some good binoculars. You can absolutely stargaze with binoculars, I actually always bring some when I do public outreach. I’m very fond of 7x50s, because the low magnification (the 7) works really great on open clusters and makes them easier to steer, while also not being so heavy that they wear out your arms after ten minutes. The 50 describes the aperture size, which means that your binoculars will have plenty of light- gathering capacity. The bigger the apertures, the more light they’ll collect, but the heavier and harder to use they’ll be. Plus, their magnification won’t be too far beneath the maximum magnification of a generic retail telescope.
If you want a great starter scope: I’d suggest that you save your money, don’t burn your budget on a crappy retail refractor. I’d also suggest doing one of the two above things to decide if you even like astronomy enough to spend the money on a good scope. If you do like it, and you do want a good starter scope, it’s hard to go wrong with a 6" dobsonian. They’re relatively cheap for what they are, very portable and manageable, and there’s a LOT you can see with them, even in the city, but especially in dark skies. Also, you could probably find some good used ones in your area for a bargain; there’s lots of folks who splurge on telescopes and fall out of love with them, and then just have it sitting in the corner of the garage for years and years. Like I said, garage sales are really great for this.
Btw, don’t get aperture fever and splurge on a double-digit aperture. I did that, but I specifically did it for outreach purposes; if I was getting it strictly for my own use, I’d have a $1500 oversized dust collector because it can be a real PITA to move outside.
+1 on binos. They’ve kept me happy because they fit in a backpack or carry-on luggage. I’m deep in light pollution, so viewing is best done with some travel. They have less magnification, but they’re as bright as a much more expensive telescope and there’s a certain value to having two eyes on the night sky.
10x50 is where I landed. Probably the same weight as your 7x50. While yes, the 50(mm) describes the outer objective lens, the key thing is really the lens on the eye side. Divide the aperture by the mag and you find that exit pupil size. 50/10=5mm, which is about the size of a dilated adult eyeball pupil - and they get smaller as you age. I’m guessing you have a Celestron or similar astro bino which has some advantages for this hobby. I am surprised at the ~$40 price tag, so I no longer want to recommend against it. Where I WAS going was that 7x35s would likely give a similar image from a reputable manufacturer while saving a little weight and being more likely to be found at a garage sale. But who could say no to $40 new 7x50s? As long as OP avoids those 20x50 boating binos or 10x25 hunting binos, they’ll be in good shape. My 10x50s are closer to OP’s budget because I opted for Nikon Action Extremes to survive my beach spot, hikes, travel, drops, and any other mishaps alike. Things go bump in the night so rubber coating and waterproofing was worth it to me
I use 7x35s for outreach and they work pretty well. I got my kids the Celestron 10x50s and can’t recommend them enough. They’re really, really great. Not too heavy or bulky, even for kids, but still very capable of enhancing your stargazing experience. They can juuuust about split a Galilean moon, IME; Jupiter will look a little odd, but I haven’t been able to distinctly identify a moon with them.
By split a gallilean moon, do you just mean see up to 4 moons separate from Jupiter? I’m pretty sure I can distinctly see them, at least with elbows on a railing or on some mount. I guess I’ll have to look tonight if it’s clear. I kinda only remember catching 3 at a time and not investigating further. I do have 20/15 vision so I guess that plays a role. Good point to remind me not everyone has my hawk eyes. I don’t catch much color though. Usually too small and washed out. It’ll have slight pink bands at best. I haven’t been able to note a crescent shape for venus, either. But I figure even cheap scopes can show my planets, so it hasn’t been my focus
Yeah, that’s what I mean. I’m impressed! For me, Jupiter looked kinda smeary, like looking at it with an astigmatism, only it wasn’t an astigmatism, it was the moons. As for Venus, I guess you might just need higher magnification to cut through the glare and resolve the crescent. The minimum power I use in my dob is 50x and you can clearly see the crescent at that power.
My local library also has telescopes you can borrow. Maybe yours does too.
This is a really great suggestion! I know many libraries do have telescopes for rent. It’s definitely worth checking!
I never even thought about garage sales! Is there a way you can test to see if they’re damaged or defective in the middle of the day? I’d hate to purchase a broken one without even knowing it.
Tl;Dr getting focus before you leave isn’t SUPER important. It can be kinda tricky to figure out for newcomers, and you’re better off using your time to assess the action and components of the scope.
Yeah, so, you’re going to want to spend some time on YouTube U learning about how to focus a telescope. It could be trickier with a dobsonian/newtonian because you may need to collimate it (though the smaller the telescope is, the less important that becomes) to see clearly, and someone at a garage sale may or may not be willing to do it for you / trust you to do it. Generally speaking, though, if all the moving parts move like you expect them to and don’t move like you don’t expect them to, the lens or mirrors aren’t obviously damaged or scratched, the eyepieces aren’t obviously damaged or scratched (eyepieces are MUCH more sensitive to any kind of damage than mirrors or lenses in terms of user experience), then you’ve got a winner. It’s hard to think of a situation where a telescope’s parts would be in working order and good condition but somehow be broken in a way that prevents it from achieving focus.
For assessing movement: with a dobsonian in particular, but really any mount, you’ll want it to be very easy (ALMOST but not quite frustratingly easy) to move the telescope so that you can track targets across the sky easily. The telescope, however, shouldn’t move on its own without some force acting on it (i.e. touch, wind, etc). If it’s moving under gravity, then either the balance is off (very possible with a dob, and usually easy to fix too), the friction is off (also an easy fix with a dob), or the mount could be bad if it uses some other kind of altitude-azimuth (left-right-up-down) mount that uses clamps and locking knobs and such. Also, make sure you try adjusting the focuser tube. They stick out and tend to get whacked, and if your focuser tube is busted, you’re SOL. Just check to see that it moves when it should and not when it shouldn’t, and that it goes all the way in and out without falling out; if it doesn’t, check for some little thumbscrews on the focuser. Sometimes, when those are tightened down, they’ll keep the focuser from moving, or let it move way too easy if they’re too loose. If those thumbscrews aren’t the problem, then the focuser is busted and you should give it a pass.
I also highly recommend checking the finder scope- that’s the little buddy telescope that’s attached to the telescope that’s there to do business. They stick out a bit and have a habit of getting damaged. It’s not a huge deal if it’s broken, they can be easily replaced, but you’re going to want to replace it before you head out or you’re going to have a bad time. Lots of people love Telrad finders, I’m an absolute nut for RACIs; beware the little straight-through scopes, though, as they’ll murder your neck when you have to look at something high up.
If you really want to try and look at something (not a bad idea, per se, just not the most effective use of your time. I’m assuming neither you nor the seller will immediately know how to achieve focus with the scope), try to pick something both big and very, very far off. If the moon’s up, try looking at that. If not, try to pick the furthest, biggest thing you can see (big makes it easy, but if it’s too close, you simply will not be able to get focus on it, period) and try to sight it in.
This deserves its own post because I nearly forgot but it’s kinda important:
If you end up buying a reflector telescope from a garage sale, DO NOT CLEAN THE MIRRORS. Unless you can’t see your reflection in them at all, just don’t touch them. You’ll be shocked at how little the dust actually impacts your view, but these mirrors are super crazy easy to permanently mess up. If you must clean them, DO NOT use a rag, DO NOT use compressed air! Use a gentle stream of distilled water to rinse it clean. The big danger here is that you could end up dragging sharp/hard debris across the mirror and cutting some serious gouges into it. This is also true of the eyepieces. Don’t use re-usable rags to clean them. I use lintless cotton eyeglass patches to clean my pieces after fogging them up with my breath (that’s cheap and readily accessible distilled water) once I’m satisfied that they’re free of any large debris. I wipe in one direction, flip it, wipe in another direction, and dispose of it. That’s it. The eyepieces being a little dirty will mess up your view, but a dirty mirror probably won’t. Only clean it if you’re 300% convinced that you must.
Also good advice: try using the telescope at least twice before you go to the event. The moon is probably the easiest, brightest target, and it’s a good place to start with making sure your focus is close to perfect. Once you’ve got the moon, move on to a few slightly more challenging but still easy targets that you should be able to see, even in an urban area, to make sure you understand how to use the scope and put it through some actual use. A pretty easy target would be the first star out from the cup on the handle of the big dipper. Tell me what you see when you find it in the scope. Jupiter is also a pretty easy, rewarding target. The sword of Orion is another bright, easy one. Lastly, Venus is a really easy target and has a little surprise for you when you find it. But two uses is enough to get familiar with your equipment, get familiar with its use, and identify any problems before you actually get out there.
Agreed on aperture fever. I find 10" the largest manageable size unless you get an Obsession Ultra Compact for $$$$$.
Didn’t really consider binos for OP since viewing anything more than 45 degrees up is a pain without a proper mount. A dob is easier to use near the horizon than using a bino to view straight upwards.
Yeah, I find that 60 degrees is about my comfort limit ATM, but I’m also guessing that there’s not going to be too much that’s very impressive and amenable to binoculars near the Zenith by the time they head out. Maybe the Leo triplet? Idk, Orion and Canis Major will be much better targets for low power, IMHO.