Acuter Solarus 80: A Smart and Safe Way to Photograph the Sun

The Sun is our closest star. It powers life on Earth and shapes our entire solar system. Watching the Sun up close is fascinating. But doing so safely is crucial. The Acuter Solarus 80 White-Light Solar Telescope makes solar observation both safe and exciting. It is a dedicated solar telescope designed for beginners, educators, and enthusiasts alike.

Purpose-built for the sun

The Acuter Solarus 80 is not a regular telescope. It is made only for observing the Sun. It uses a front-mounted white-light glass solar filter. This filter is permanently fixed and complies with ISO 12312-2:2015 safety standards. This means your eyes are protected while viewing. It shows the Sun’s photosphere, the outer surface where sunspots and granulation appear. You won’t see prominences (which need H-alpha telescopes), but you’ll get detailed views of sunspots.

Optical power and simplicity

This telescope is an 80mm achromatic refractor. That’s a big enough aperture to give sharp views, yet compact and lightweight. The telescope has a 400mm focal length, which makes it fast (f/5) and offers a wide field of view. It comes with a zoom eyepiece (5mm to 16mm), allowing magnification from 25x to 80x. You don’t need to switch eyepieces. Just turn the zoom to adjust. This makes solar observing quick and easy, especially for beginners.

Six-filter color wheel

One unique feature of the Solarus 80 is its built-in rotating filter wheel. It includes six filters:

• Red
• Yellow
• Green
• Blue
• Orange
• Neutral Density (ND)

There’s also one empty slot for custom filters. Each color filter enhances contrast differently. For example, yellow makes sunspots sharper. Green improves edge definition. The ND filter tones down brightness without color. Users can switch filters by simply rotating the wheel. This is fun, especially for students or family viewing sessions. It also lets you compare and learn how filters affect visibility.

Focus and view

The Solarus 80 includes a Crayford-style focuser. It works smoothly and offers precise focusing. The eyepiece sits in a 90° star diagonal, which makes viewing more comfortable. It also includes a safe solar finder. This helps you point the telescope at the Sun without looking directly. The finder shows where the Sun is using a shadow alignment method. This keeps your eyes completely safe.

Smartphone imaging made easy

The telescope comes with a universal smartphone adapter. You can attach your phone to the eyepiece. This allows you to take clear photos and videos of the Sun. Capturing sunspots is simple. You just focus the telescope, align the camera, and tap. It’s a great way to document solar activity, watch sunspot changes, or even shoot a solar eclipse.

Great for education and outreach

This telescope is ideal for schools, science clubs, museums, and public events. Its built-in safety features and filter options make it fun and educational. Teachers can show students real-time sunspot activity. Outreach groups can conduct solar viewing without worrying about safety. Since the telescope is dedicated to solar use, there’s no risk of misuse at night. That’s a big plus when it comes to public setups or lending programs.

What you can see

With the Solarus 80, you can observe:

• Sunspots: Dark, cooler areas on the Sun’s surface. You can see their size, shape, and movement.
• Faculae: Bright patches often near sunspots. They appear as brighter regions against the solar disk.
• Solar rotation: Watch sunspots move across the Sun over days.
• Eclipses and transits: The Moon, Mercury, or Venus can pass in front of the Sun. This telescope is great for viewing these events.

You cannot view prominences or flares. For those, you need H-alpha or Ca-K telescopes, which are more expensive.

Key specifications

Specification	Details
Aperture	80 mm
Focal Length	400 mm
Focal Ratio	f/5
Zoom Eyepiece	5–16 mm (25x to 80x)
Filter Wheel	6 installed + 1 empty
Weight	1.75 kg
Tube Length	378 mm
Safety	ISO-certified front glass filter
Included Accessories	Diagonal, finder, zoom eyepiece, smartphone adapter

Price and availability

The Acuter Solarus 80 OTA is available for around $260 from multiple telescope retailers.

Final thoughts

The Acuter Solarus 80 is a small and reliable solar telescope. It blends safety, portability, and ease of use into a single package. Whether you’re a beginner, a teacher, or an eclipse chaser, it gives you everything you need to explore the Sun. With its built-in zoom, filter wheel, and smartphone adapter, you can view, compare, and capture solar activity with ease. For those looking to start their solar astronomy journey, the Acuter Solarus 80 is an excellent choice. It’s affordable, fun, and designed with care and precision.

Clear skies!

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