User Guide
Types of Telescopes User-Guide
Choosing a telescope can feel overwhelming. There isn't just one type — different designs suit different goals, from daytime viewing to deep-sky astronomy and even astrophotography.
Just as important as the telescope itself is how it's supported and moved. Most telescopes sit on a mount (the mechanism that lets you point and track objects) which is attached to a tripod (the stand that holds everything steady). Please note, Dobsonian telescopes use a different approach — they have their own integrated base that sits directly on the ground, combining mount and support in one simple, stable system.
The type of mount matters because it affects how you use your telescope.
- For daytime viewing — watching wildlife, ships, or scenery — you need a mount that moves easily up-down and left-right (called Alt-Azimuth or Alt-Az).
- For astronomy, some mounts can track objects as they move across the night sky, while others require you to manually follow them.
The mount you choose impacts whether your telescope works well for daytime use, casual stargazing, or serious astronomy.
This guide explains the main telescope types, the mounting systems they typically use, and how each choice impacts your experience.
Which telescope type is right for you?
- Daytime viewing (wildlife, scenery) + Moon and planets: Refractor telescopes
- Moon, planets, and bright deep-sky objects on a budget: Smaller Reflector telescopes (76-114mm)
- Moon, planets and deep-sky astronomy (galaxies, nebulae) - best value: Larger Reflector telescopes (≥130mm) or Dobsonian telescopes
- Best power ( aperture) value for money but with a portability trade-off : Dobsonian telescopes
- Compact, portable, versatile for astronomy + astrophotography: Cassegrain telescopes
- GoTo/computerized tracking: Available across all types, though mostly Cassegrain Telescopes
Types of Telescopes & their Mounts Explained
Refractor Telescopes
Who are Refractor Telescopes ideal for?
- Anyone wanting to use their telescope for both daytime and nighttime viewing
- Beginners looking for a simple, low-maintenance telescope
- Those prioritizing ease of use and classic design
- Moon and planetary observers who don't need large aperture
Key considerations for Refractor Telescopes
Aperture: Most refractors are ≤120mm aperture. Great for daytime and crisp planetary views, but relatively small if your main goal is faint deep-sky objects.
Magnification: Excellent image quality with sharp, high-contrast views.
The mounting system:
- Alt-Az (Alt-Azimuth): Simple up-down, left-right movement. Great for daytime and casual astronomy.
- Computerised / Wi-Fi GoTo-Alt-Az: Motors find and track objects automatically.
- App-guided navigation (StarSense Explorer): Phone + app shows arrows guiding you to objects. You move the telescope; no motors or batteries required.
Ease of operation: Very simple and intuitive - ready to use straight out of the box.
Price: Price climbs quickly as aperture size increases.
Reflector Telescopes
Who are Reflector Telescopes ideal for?
- Astronomy enthusiasts focused on nighttime viewing only
- Those wanting more light-gathering power for their budget
- Moon, planet, and deep-sky observers (depending on aperture size)
- People comfortable with occasional maintenance (collimation)
Key considerations for Reflector Telescopes
Aperture:
- Smaller Reflectors (76–114mm): Great for Moon, planets, bright clusters/nebulae
- Larger Reflectors (≥130mm): Also excellent for deep-sky (galaxies, nebulae)
Magnification: More light-gathering power for your money compared to refractors.
The mounting system:
- Equatorial (EQ): Tilted axis matches Earth's rotation, lets you track stars smoothly.
- GoTo EQ (e.g. SynScan): Motorised version; finds and tracks automatically.
- App-guided navigation (StarSense Explorer): Available on reflector models; app guides while you move the telescope.
Ease of operation: Not suitable for daytime use (image inverted/reversed). Requires occasional mirror alignment (collimation).
Price: Affordable way to see faint night-sky objects.
Cassegrain Telescopes
Who are Cassegrain Telescopes ideal for?
- Astrophotographers and serious astronomy enthusiasts
- Those wanting a compact, portable telescope with good aperture
- Users interested in computerised/GoTo systems
- Advanced users wanting versatility for both observing and imaging
Key considerations for Cassegrain Telescopes
Aperture: Compact, versatile design for astronomy and astrophotography. Smaller Cassegrains ≤150mm (≤6" aperture) are possible for daytime viewing (note: image is back to front).
Magnification: Excellent all-rounder for observing and imaging with compact design.
The mounting system:
- Alt-Az GoTo: Motorised, easy to use for casual astronomy.
- App-guided navigation (StarSense Explorer): Some models include this dock system for phone + app guidance.
Ease of operation: Compact and portable despite larger apertures. Often come with computerised mounts and GoTo systems.
Price: Higher price per aperture compared to reflectors.
Dobsonian Telescopes
What are Dobsonians?
Dobsonians are Reflector telescope tubes mounted on Dobsonian bases - a simple, stable Alt-Az style mount.
Who are Dobsonian Telescopes ideal for?
- Deep-sky enthusiasts wanting maximum aperture at lowest cost
- Those who prioritize viewing performance over portability
- Astronomy-only users (not for daytime viewing)
- People who want a stable, easy-to-use mount
Key considerations for Dobsonian Telescopes
Aperture: Simple, powerful, affordable way to get a large aperture - the easiest way to get big mirrors at low cost.
Magnification: Excellent for faint deep-sky objects due to large aperture sizes.
The mounting system:
- Dobsonian base (Alt-Az style): Rotates left–right, tilts up–down. Intuitive and rock solid.
- Computerised Dobsonian GoTo: Some models include full motorised GoTo.
- App-guided navigation (StarSense Explorer): App guides you to objects while you move the scope.
Ease of operation: Very stable to use and easy to push and follow objects. However, bulky to store or transport.
Price: Best value for aperture size.
Key considerations for general purpose telescopes
Telescopes for Daytime Use
Refractor: ✅
- Excellent for daytime and astronomy — but limited in size (≤120mm aperture). Fine for Moon/planets, less so for faint deep-sky.
Reflector: ❌
- Not recommended — designed for astronomy, orientation not suited for daytime
Dobsonian: ❌
- Not suitable (bulky, astronomy only)
Cassegrain: ≤150mm (6" aperture) ✅
- Possible for daytime (mirror-image view, narrow field, high magnification) | ≥200mm (8" aperture):
Cassegrain: >150mm (6" aperture)❌
- Not suitable (heat shimmer + too much magnification)
What the Types of Telescopes are Best For
Refractor:
- Scenery, Wildlife, Moon, Planets. Limited for faint deep-sky (aperture capped).
Reflector: 76–114mm:
- Moon, planets, bright clusters/nebulae
Reflector|130mm:
- Moon, pleanets & also deep-sky (galaxies, nebulae)
Dobsonian:
- Affordable large-aperture astronomy (excellent for faint deep-sky)
Cassegrain:
- Some daytime (depending on size). All-round astronomy + astrophotography (compact SCT/Maksutov)
Mount / GoTo Options
Refractor:
- Alt-Az ( Alt-Azimuth), Computerised/Wi-Fi GoTo, App-guided navigation (StarSense Explorer)
Reflector:
- Alt-Az ( Alt-Azimuth), EQ (equatorial mount), GoTo EQ (e.g. SynScan), App-guided navigation (StarSense Explorer)
Dobsonian:
- Dobsonian base • Computerised Dobsonian GoTo • App-guided navigation (StarSense Explorer)
Cassegrain:
- Alt-Az GoTo, EQ GoTo, App-guided navigation (StarSense Explorer)
Portability
- Refractor: Mid
- Reflector: Mid
- Dobsonian: Mid–Low (base is bulky)
- Cassegrain: High (compact, portable)
Maintenance
- Refractor: Very low
- Reflector: Moderate (collimation required)
- Dobsonian: Moderate (collimation required)
- Cassegrain: Low–Moderate (occasional adjustments)
Price Range
- Refractor: $–$$$
- Reflector: $–$$
- Dobsonian: $–$$
- Cassegrain: $$–$$$$
FAQ
Which telescope type is best for beginners?
The term "beginner telescope" is a bit misleading - telescopes are like cars in that there isn't really a "beginner" model, just different price points and capabilities. Most telescopes are straightforward to use; the real question is what do you want to observe and your budget.
For daytime viewing (wildlife, scenery) plus casual astronomy: A refractor telescope is your best bet. They're simple, low-maintenance, and work well for both day and night use right out of the box.
For astronomy on a budget: We'd recommend a reflector telescope on an Alt-Az mount. Smaller reflectors (76-114mm) are affordable, easy to use, and give you much better views of the Moon, planets, and bright deep-sky objects than a similarly-priced refractor. For even more light-gathering power, a Dobsonian telescope offers the best value - they're incredibly stable and intuitive to use.
Helpful technology for astronomy beginners: Celestron's StarSense Explorer system is excellent for those starting out in astronomy. It uses your smartphone and an app to guide you to celestial objects - you simply follow the arrows on your screen. No motors, batteries, or complicated setup required. We particularly recommend the StarSense Explorer reflector models, which combine ease of use with good aperture for viewing deep-sky objects.
Can I use a reflector telescope during the day?
No, most reflector telescopes (including Dobsonians) are not recommended for daytime use. The image orientation is inverted and reversed, which makes viewing terrestrial objects like wildlife or scenery very difficult and disorienting.
Reflector telescopes are designed specifically for astronomy, where image orientation doesn't matter. If you want a telescope for both daytime and nighttime use, a refractor telescope is your best option.
What's the difference between a Dobsonian and a regular reflector?
A Dobsonian is actually a reflector telescope - the difference is in the mount. Regular reflectors typically come on tripod-mounted systems (either Alt-Az or Equatorial mounts), while Dobsonians have their telescope tube mounted on a simple, stable base that sits directly on the ground.
Dobsonian mounts are incredibly stable, easy to use, and cost-effective, which is why Dobsonians offer the best value for large aperture sizes. The trade-off is that they're bulkier and less portable than tripod-mounted reflectors. Both use the same mirror-based optical design.
Do I need a computerized/GoTo mount?
No, a computerized/GoTo mount is not necessary, especially for beginners. Many people enjoy the process of learning the night sky and manually finding objects - it's part of the astronomy experience.
However, GoTo mounts can be very helpful if you:
- Have limited time and want to see many objects quickly
- Live in an area with light pollution where objects are harder to find
- Are interested in astrophotography (tracking is essential)
- Prefer convenience over the learning experience
GoTo systems are available across all telescope types, though they're most commonly found on Cassegrain telescopes. There's also a middle-ground option: app-guided navigation systems like StarSense Explorer, which guide you to objects without motors or batteries.
Which telescope type is best for astrophotography?
Cassegrain telescopes (SCT and Maksutov designs) are generally the best choice for astrophotography because they're:
- Compact and portable despite good aperture
- Usually come with computerized tracking mounts
- Have excellent optical quality for imaging
- Compatible with camera adapters and accessories
Larger refractors can also be excellent for astrophotography, particularly for planets and the moon, though they become expensive at larger apertures.
Reflectors and Dobsonians can be used for basic astrophotography (especially lunar and planetary), with your smart phone but they're less ideal for deep-sky imaging due to mount limitations and the need for precise tracking.
What does aperture size mean and why does it matter?
Aperture is the diameter of your telescope's main lens or mirror - essentially, how wide the "light bucket" is. It's measured in millimeters (mm) or inches.
Aperture matters because it determines:
- How much light the telescope gathers larger aperture = brighter, clearer views of faint objects
- Resolution and detail larger aperture = ability to see finer details
- What you can see small apertures are fine for the Moon and planets, but you need larger apertures (130mm+) to see faint galaxies and nebulae well
Aperture is the single most important specification of a telescope. A larger aperture on a simple telescope will generally outperform a smaller aperture on a more expensive telescope for viewing faint objects.
Will I need a tripod with all telescope types?
Most telescope types come with a tripod included:
- Refractorscome with tripod and mount
- Reflectorscome with tripod and mount (Alt-Az or Equatorial)
- Cassegrainscome with tripod and mount (usually computerized)
Dobsonians are the exception - they don't use a tripod. Instead, they have an integrated base that sits directly on the ground or a table. This makes them very stable but also bulkier to transport.
The tripod and mount are usually matched to the telescope when you buy it, so you don't need to worry about purchasing them separately.
Can I upgrade or change the mount on my telescope later?
Yes, you can upgrade your mount separately, though it can be expensive and you are often better off to sell your current set up and get a new system.
If you decide to upgrade your mount, you need to ensure:
- The new mount can support the weight of your telescope
- The telescope tube has the right attachment points (dovetail bar or tube rings)
- The mount type suits your needs (Alt-Az for daytime/casual use, Equatorial for tracking, GoTo for automation)
For beginners, it's usually best to start with the mount that comes with your telescope and upgrade later only if you find you need specific features. Dobsonians are the exception - their integrated base design makes mount upgrades impractical.
Final Thoughts
Choosing a telescope is about matching the design to what you want to see and how you want to use it:
- Refractors are the most straightforward, and the only type that truly doubles for daytime and astronomy.
- Reflectors and Dobsonians give the most aperture for the cost, making them ideal if your priority is astronomy.
- Cassegrains balance portability with capability, and are popular for those who want a compact scope that works well with a GoTo system and imaging.
Think first about your main use — daytime, Moon/planets, deep-sky, or astrophotography — and let that guide your choice.
Still not sure which telescope is right for you?
We're here to help!