How to Choose Your First Dobsonian Telescope
By Cloud Break Optics | Published: 2026-10-22
Category: Buying Guides
New to stargazing? Learn what makes a Dobsonian a great first telescope, how to pick the right size, and which models fit your needs and budget.
Quick Answer
For your first Dobsonian, choose the largest aperture you can comfortably store and carry, but don't overlook portability and ease of setup. A 10-inch Dobsonian is a sweet spot for many beginners, offering great views without being too bulky.
Why a Dobsonian is a Great First Telescope
Dobsonian telescopes are popular among beginners because they offer large aperture at a reasonable price. The simple, sturdy mount is easy to use—just point and look. You don't need to align a tripod or polar align, so you can spend more time observing and less time setting up.
The trade-off is that Dobsonians are bulky and not as portable as smaller refractors or catadioptric scopes. If you plan to travel to dark skies frequently, you'll need to consider how you'll transport it.
Aperture vs. Portability: The Real Trade-off
Aperture is the most important factor for visual observing—it determines how much light you gather and how much detail you can see. However, larger apertures mean heavier and bulkier tubes. A 10-inch Dobsonian can be a great compromise, but you must be realistic about storage space and lifting weight.
If you have a small car or live in an apartment, a smaller 6-inch or 8-inch might be more practical. If you have a dedicated space and a vehicle with room, a 10-inch or 12-inch can give you spectacular views.
Open Box and Tube-Only Options: What to Know
Sometimes you can save money by buying an open box or tube-only telescope. An open box product is often unused but may have minor cosmetic blemishes. A tube-only sale means you get only the optical tube—you must provide or build your own base. This can be a great deal if you already have a mount or are handy with DIY projects, but it's not ideal for a complete beginner who wants a ready-to-use setup.
When considering such deals, check what's included and whether replacement parts are available. For a first telescope, a complete package is usually less stressful.
Decision Rules: Choose Your First Dobsonian
- Set your budget: Decide how much you're willing to spend, including accessories like eyepieces, a collimation tool, and a carrying case. A good rule is to allocate 70-80% for the scope and the rest for essentials. Remember to include tax and shipping in your total.
- Consider storage and transport: Measure your storage space and your car's trunk. If you can't easily move the scope, you'll use it less. A 10-inch Dobsonian is a good balance for many, but if you have tight spaces, go smaller. Check the weight of the tube and base separately—you'll need to lift both.
- Decide between complete and tube-only: For a first telescope, choose a complete package with a base. A tube-only deal is only worth it if you already have a mount or are confident building a base. Read the product description carefully to see what's included.
- Check the included accessories: Look for eyepieces, a finderscope, and a focuser. A 2" focuser gives you more flexibility for low-power wide-field views. Two eyepieces (like 25mm and 10mm) are enough to start. You may want to add a 2x Barlow later for more magnification options.
- Think about collimation: Dobsonians need occasional collimation (mirror alignment). Make sure you're willing to learn this simple skill, or choose a model with collimation-friendly features like a laser collimator. A collimation tool is a worthwhile investment.
Two Dobsonian Options to Consider
- 10" Quattro Imaging Newtonian (S11220): 254 mm Newtonian reflector with 1000 mm focal length (f/4), fully multi-coated borosilicate mirrors, 2" dual-speed 10:1 focuser, and 8x50 finderscope. The fast f/4 focal ratio and quality mirrors make this a good choice for deep-sky observing, and the dual-speed focuser helps you fine-tune focus for crisp views.
10" Quattro Imaging Newtonian (S11220) - OPEN BOX - 10" Flextube Collapsible Dobsonian (S11720) TUBE ONLY: Open box 10" (254 mm) collapsible Dobsonian with 1200 mm focal length (f/5), 2" Crayford-style focuser, two Plössl eyepieces, and an 8x50 right angle finderscope—tube only, no base. This is a budget-friendly option if you already have a base or are willing to build one, but you'll need to factor in the extra cost and effort of a mount.
OPEN BOX - 10" Flextube Collapsible Dobsonian (S11720) TUBE ONLY
Who Should Buy Which
Best for
- Beginners who want a large aperture without breaking the bank
- Observers who have a stable storage spot and can manage the size
- Those who enjoy tinkering and are willing to learn collimation
Not for
- Travelers or apartment dwellers with limited space
- Those who want a grab-and-go setup for quick observing sessions
- Complete beginners who prefer a fully ready-to-use package without any assembly
