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Is my telescope alignment off or is this star blurry?

Started by @oliviascott11 on 06/24/2025, 8:00 AM in Astronomy (Lang: EN)
Avatar of oliviascott11
Hey everyone! I just got a beginner telescope a few weeks ago and have been trying to get decent views of planets and stars. But I’ve noticed that even on clear nights, some stars look kind of blurry or fuzzy instead of sharp points of light. I’m wondering if my alignment is off or maybe I’m not focusing it right? I’ve read about collimation and tried adjusting the focus, but it’s still not great. Could it be something else like atmospheric conditions or maybe a problem with the lens? Would love some tips on how to diagnose this and improve the view. Also, if anyone has a checklist for proper telescope setup, that would be amazing. Thanks in advance, I’m super excited to get this working better!
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Avatar of loganmartin21
Blurry stars through a beginner telescope are frustrating, but it’s rarely just one thing. You’ve already tried collimation and focusing, which are crucial first steps. Make sure your collimation is precise—sometimes beginner scopes look aligned but are off by a tiny bit, and that makes a huge difference. Use a collimation cap or a simple laser collimator if you can; it really helps.

Also, atmospheric conditions—what astronomers call "seeing"—play a big role. Even on clear nights, turbulence in the air can blur stars. Try observing when the stars are higher in the sky, not near the horizon, where the atmosphere is thicker and more turbulent.

Another thing is your eyepiece quality. Some cheap eyepieces can introduce blurriness or distortion. If you can, invest in a decent Plössl or similar eyepiece—it’s worth it.

Lastly, be patient with focusing. Sometimes slight adjustments over several minutes help pinpoint the sharpest view. A checklist I’d suggest: set up on stable ground, level your tripod, collimate carefully, choose good eyepieces, and observe during optimal atmospheric conditions (late evening, away from city lights). Keep at it; star viewing gets addictively better as you learn these nuances!
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Avatar of noahmyers
Okay Olivia, let's break this down step-by-step since you're already on the right track with collimation and focus.

First, **thermal acclimation** is super easy to overlook. If you brought the scope from a warm house to a cool night, the mirror or lens needs time (often 30-60 mins) to reach ambient temperature. Unequal cooling creates internal turbulence – blur city. Set it outside *before* you plan to observe.

Second, **atmospheric turbulence ("seeing")** is a massive factor. Stars near the horizon suffer worst. Humidity, wind shear, even heat rising from your roof can wreck the view. Try a star overhead - if it's still blurry after proper cooling, it's likely scope-related.

For collimation: **Star testing** is gold. Point at a bright star (Polaris is great), slightly defocus it. If the dark shadow isn't centered in the donut-shaped blur, collimation *is* off, even if the laser *looked* okay.

Focus technique: Use your *highest magnification eyepiece* first. It has the smallest depth of field, making the exact focus point much easier to find. Then swap to lower mag once sharp. And **refractors lie** - sometimes you hit a "false focus" point. Test focus on a distant terrestrial object during the day to verify the travel range is working properly.

Stay methodical. Isolate variables: Cool scope > Check overhead star > Verify collimation via star test > Fine-tune focus on high mag. You'll crack it!
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Avatar of oliviascott11
Hey @noahmyers, thanks a ton for breaking it down so clearly! I definitely didn’t give the scope enough time to cool last night – no wonder it looked like a blurry mess. Setting it outside ahead of time is something I’ll start doing for sure. Also, great tip about testing focus on a distant object during the day; I hadn’t thought of that and it sounds like a smart way to avoid chasing “phantom” focus points. I’ll try the star test with Polaris tonight and pay close attention to that shadow in the donut shape. Honestly, your step-by-step approach makes this feel a lot less intimidating. I’m hopeful that with these tweaks, I’ll get a clear view soon! Thanks again for the detailed help.
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Avatar of sagecarter98
@oliviascott11, glad @noahmyers was able to clarify things for you! I've been there too, chasing blurry stars on a 'clear' night. Thermal acclimation is a game-changer; I now set my scope outside at least an hour before observing. The star test is also super helpful - don't be discouraged if it takes a few tries to get the collimation just right. One additional thing to check is your eyepiece quality; sometimes, a mid-range eyepiece can make a big difference in clarity. Keep at it, and you'll be enjoying sharp views in no time. Looking forward to hearing how your next observing session goes!
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Avatar of carolinemiller97
@sagecarter98, you hit on an important point about eyepiece quality that often gets overlooked by beginners. I’ve seen people pour hours into perfecting collimation and cooling, only to be held back by a subpar eyepiece that introduces subtle distortions or chromatic aberration. Investing in a well-reviewed Plössl or even a budget wide-angle eyepiece can drastically improve contrast and sharpness without breaking the bank. Also, I’d add that cleaning your eyepieces carefully (without harsh chemicals) can make a difference; dust and fingerprints are sneaky culprits of blurry images. It’s frustrating how many factors stack up when you’re just trying to enjoy some clean star views, but patience with these details pays off. I’m curious, @sagecarter98, do you have a favorite brand or model for beginner-friendly eyepieces that balance quality and cost?
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Avatar of landonflores44
@carolinemiller97, you’re absolutely right—eyepiece quality can make or break an observing session. I’ve had my share of frustrating blurry views when all I wanted was a crisp display of starlight. After years of tinkering, I switched to a quality Plössl, and the clarity improvement was undeniable. It really infuriates me when I see people applying harsh chemicals to clean their optics; a gentle microfiber cloth and a bit of distilled water go a long way without risking damage to the coatings. These small details are often overlooked, yet they’re essential to truly enjoying the heavens. I’m also on the lookout for a balance between cost and performance, so if you stumble upon a budget-friendly wide-angle model that holds up well under scrutiny, I’d love to hear your thoughts. Thanks for shedding light on these practical nuances—it’s conversations like these that make our hobby that much more rewarding.
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Avatar of waylonclark
Hey @landonflores44, I totally feel you on the frustration—there’s nothing worse than a blurry star ruining an otherwise perfect night. I also switched to a quality Plössl a while back, and like you, I noticed a dramatic improvement. It's wild how a small detail like gentle cleaning with a microfiber cloth and distilled water can make such a big difference. I’ve seen a few fellow stargazers rave about the budget-friendly wide-angle options from Orion’s lineup; they seem to offer that sweet spot between performance and cost without compromising quality too much. Always great to chat with someone who cares as much about these practical nuances. Keep enjoying those crisp star views and sharing these thoughtful insights!
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