Bresser Classic 70 350 Refractor Telescope: Setup, Views and Tips

Updated November 2026

The bresser classic 70 350 refractor telescope is a 70 mm f/5 achromatic refractor that is aimed at beginners who want bright, sharp views of the Moon, the brighter planets and a handful of deep-sky objects. In this guide you will learn what the instrument realistically shows, how to assemble and align it, how to pick eyepieces that suit its focal length, and how to avoid the errors that frustrate most first-time owners. The goal is simple: get outside and see something real within the first hour.

What the Bresser Classic 70/350 Actually Shows You

The name tells you the core specifications. A 70 mm objective gathers light and resolves detail, and the 350 mm focal length sets the magnification range. Manufacturers typically specify an f/5 focal ratio, which gives a short, wide-ish tube for its aperture. Because it is an achromatic design, you should expect a faint purple or green fringe around very bright objects such as the Moon or Venus. That is normal for this optical class and is not a defect.

Shopping for one? See our guide: Top 6 APO Refractor Telescopes for Astrophotography Compared (2026).

In practical terms, the scope is best at the following targets:

• The Moon: Craters, the terminator shadows and the maria are sharp and rewarding, especially near the day-night line.
• Jupiter: You can usually see the four Galilean moons as small points of light and faint cloud bands on a steady night.
• Saturn: The rings are visible as a distinct shape, though the Cassini Division is a challenge at this aperture.
• Venus and Mars: Venus shows phases, while Mars appears as a small disk whose details depend heavily on seeing and the planet’s position.
• Bright deep-sky targets: The Pleiades, the Orion Nebula, the Andromeda Galaxy core and some open clusters are good starting points.

What it will not do is show faint galaxies or nebulae as photographs. Expect soft gray smudges rather than color, and set your expectations around that from the start.

Unboxing and Assembly: A Step-by-Step Setup

Most owners find assembly takes between 20 and 40 minutes the first time. Work on a table indoors, then carry the assembled scope outside to let it reach ambient temperature.

Step 1: Attach the Tripod and Mount

1. Spread the tripod legs fully and tighten the leg locks until they feel firm.
2. Set the tripod head on top and secure it with the central bolt.
3. Attach the mount to the head, making sure the azimuth and altitude locks are snug but not overtightened.

Step 2: Mount the Optical Tube

1. Slide the tube rings onto the dovetail or mounting bar, then fasten the screws evenly.
2. Check that the tube sits level in the rings before you tighten them completely.
3. Balance the tube so it stays put when you loosen the altitude lock. Shift it forward or back in the rings if it tips.

Step 3: Insert the Diagonal and Eyepiece

1. Remove the dust cap from the focuser and insert the star diagonal.
2. Place the eyepiece into the diagonal and tighten the thumbscrew.
3. Use the finder scope to aim the tube at a bright object before looking through the eyepiece.

Choosing Eyepieces for a 350 mm Focal Length

Magnification equals the telescope’s focal length divided by the eyepiece’s focal length. With 350 mm of focal length, a 25 mm eyepiece gives roughly 14x, a 10 mm gives 35x, and a 6 mm gives about 58x. Most bresser classic 70 350 refractor telescope owners find that the useful range sits between about 20x and 50x, depending on conditions.

Eyepiece Focal Length	Approx. Magnification	Best Use
25 mm	14x	Wide-field views, finding objects, large star clusters
10 mm	35x	Moon, Jupiter, Saturn, general observing
6 mm	58x	Planetary detail on steady nights, only when seeing allows

Start with the lowest-power eyepiece so you can find targets easily, then step up in power only when the image stays sharp. Pushing magnification beyond what the aperture can support just makes the view dim and blurry.

Aligning the Finder and Focusing

Before you observe, align the finder scope. In daylight, aim the main tube at a distant, clearly defined object such as a rooftop or tree edge. Center it in the eyepiece, then adjust the finder’s three alignment screws until the same object sits centered in the finder crosshairs. Doing this once in daylight saves a lot of frustration after dark.

For focusing, start with the focuser fully racked in one direction, then slowly turn the knob until the target snaps into sharp focus. Overshoot slightly and come back. Many owners find that focus shifts a little as the tube cools, so refocus every fifteen minutes or so.

Planning Your First Night

Pick the Right Target

Begin with the Moon, since it is bright, easy to find and rewarding even in light-polluted skies. Once you are comfortable, move to Jupiter or Saturn when they are well placed in the evening sky. Check a planetarium app or a monthly sky guide to confirm which planets are up.

Let the Scope Cool

Refractors need time to reach outdoor temperature. Give the optics at least 30 to 45 minutes before serious observing. Shimmering images in the first half hour are almost always thermal, not a defect in the optics.

Use the Right Sky Conditions

• Choose nights when the air looks steady, with stars that do not twinkle wildly.
• Observe away from streetlights and, if possible, avoid the Moon’s glare when working on faint objects.
• Dress warmly. Sitting still at the eyepiece cools you quickly.

Recommended Gear

A few accessories make the bresser classic 70 350 refractor telescope more enjoyable without requiring a major investment in complexity.

• Moon filter: A neutral density filter reduces glare when the Moon is bright and improves contrast on the surface. View on Amazon
• Red flashlight: A dim red light preserves your night vision while you read star charts and adjust settings. View on Amazon
• Planisphere: A rotating star chart shows which constellations are up at a given time and date, which helps you plan targets. View on Amazon
• Eyepiece set: A small set of additional focal lengths lets you match magnification to conditions. View on Amazon

For readers interested in what other refractors in this size class deliver, the guide Uscamel Refractor Telescope 70/400 Az: What It Shows and How to Set It Up offers a useful comparison of a similar aperture and mount arrangement.

Common Mistakes

• Using too much magnification: Start low. High power on a small aperture produces dim, soft images.
• Skipping the cooldown: Observing immediately after carrying the scope outside leads to blurred views.
• Ignoring the finder alignment: If the finder is off, you will spend the night hunting targets instead of observing them.
• Expecting photo-like color on deep-sky objects: Nebulae and galaxies look gray and faint. That is how the eye works with modest apertures.
• Forgetting to protect the Sun: Never point the scope at the Sun without a proper full-aperture solar filter. Eyepiece filters and improvised film are not safe. If you want to observe the Sun, review Top 7 Refractor Telescope Solar Filters Compared for Safe Sun Viewing before attempting it.
• Overtightening the mount: Forcing locks can strip threads or bend fittings.

Tips for Getting More From the Scope

• Keep a simple observing log with the date, target, eyepiece and what you saw. Patterns in seeing conditions will emerge quickly.
• Learn a handful of constellations each month rather than trying to memorize the whole sky.
• Store the scope indoors when not in use, and let it acclimate before each session.
• Clean optics only when necessary, using a soft brush and a lens cleaning solution made for optics.
• If you outgrow the instrument, the Wide Field Refractor Telescope Picks Compared for 2026 guide covers larger options for wider views.

FAQ

Is the bresser classic 70 350 refractor telescope good for beginners?

Yes. Its simple design, modest size and easy-to-use focuser make it approachable for someone with no prior experience. It is best suited to lunar, planetary and bright deep-sky viewing rather than faint galaxy hunting.

What is the maximum useful magnification?

A common rule is roughly 2x the aperture in millimeters, which would be about 140x. In practice, most owners find the usable limit is lower, often between 50x and 70x, because atmospheric steadiness usually restricts sharpness before the optics do.

Can I use this telescope for astrophotography?

Basic lunar and planetary imaging is possible with a smartphone adapter or a dedicated webcam, but long-exposure deep-sky photography requires a more stable mount and tracking. The scope works best as a visual instrument.

Why does the image look colorful around bright objects?

This is chromatic aberration, a common trait of achromatic refractors. It is most visible on the Moon and Venus. A Moon filter or observing at slightly lower power can reduce it noticeably.

Do I need a motorized mount?

Not to start. Manual movement is adequate for the Moon and planets at low to moderate power. A motorized drive becomes more useful if you plan to track objects over longer periods or move into imaging.

How often should I collimate or check alignment?

Achromatic refractors have fixed optics that rarely need collimation. Check the finder scope alignment before each session and inspect the tube rings and mounting screws periodically to make sure nothing has loosened.

Is it safe to look at the Sun through this telescope?

No, not without a certified full-aperture solar filter placed over the front of the tube. Eyepiece-mounted filters can crack from heat and cause serious eye injury. If you are unsure about solar safety, consult an experienced astronomy club member or a qualified professional before attempting daytime observing.

Conclusion

The bresser classic 70 350 refractor telescope rewards patient, well-prepared observers with sharp lunar views, recognizable planetary detail and a pleasant set of bright deep-sky targets. Set it up carefully, start with low-power eyepieces, let the optics cool and keep your expectations grounded in what a 70 mm aperture can deliver. Do that, and your first clear night will be memorable for the right reasons.

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