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Explore Scientific Sidara Telescopes: Nano, Essential, Plus and Pro Compared

Explore Scientific Sidara Nano 114 reflector, Sidara Essential 102 refractor and Sidara Pro 127 Maksutov-Cassegrain telescopes on their tripods, side by side

AstroTelescopium Team |

The Explore Scientific Sidara line is easiest to understand as four mounts, each carrying two or three telescopes. All nine packages come with the same 25mm and 10mm eyepieces and work with the same SkyAssist phone app. What changes from the Nano 114 to the Pro 127 is the mount under the tube, and whether that tube gathers light with a lens, a mirror, or the Maksutov's mix of both. Pick the mount for how you want to observe, then the tube for what you want to see.

TL;DR: Quick Summary

Start most first-time buyers on the Sidara Essential 130; the other four picks cover a tight budget, maximum aperture, GoTo and the Moon and planets.

Explore Scientific publishes no MSRP, so the prices below are its retail prices.

Where most buyers should start: the Sidara Essential 130 ($399.99) pairs a 130mm reflector with the Essential mount's worm-gear slow-motion controls.

Best on a tight budget: the Sidara Nano 114 ($199.99) puts a 114mm reflector on the grab-and-go Nano mount, with no electronics to power and no alignment to run.

Most aperture: the Sidara Plus 150 ($699.99) has the largest aperture in the Sidara line, on the medium-duty Plus mount.

Best GoTo package: the Sidara Pro 102 ($799.99) finds and tracks targets from your phone or the hand controller, and its 660mm refractor gives the widest views of the three Pro telescopes.

Best for the Moon and planets: the Sidara Pro 127 ($999.99) puts a 1,900mm Maksutov-Cassegrain on the same GoTo mount and reaches 190x with its own 10mm eyepiece.

Table of Contents

What Is the Explore Scientific Sidara Line?

Sidara is Explore Scientific's line of complete telescope packages, introduced at the Northeast Astronomy Forum in April 2026. Each package pairs a telescope with a mount and tripod matched to it. Explore Scientific describes the line as an expansion of its range rather than a replacement: its current lineup continues alongside Sidara, and its FirstLight 80mm refractor now also comes as a package on the Sidara Nano mount.

Explore Scientific sums up the four tiers in one line: "Nano for grab-and-go, Essential for smooth slow-motion control, Plus for more aperture, Pro for GoTo with SkyAssist." Here is how the nine telescopes sit on those four mounts:

Tier Mount Telescopes
Sidara Nano Manual alt-az with slow-motion controls 90mm refractor, 114mm Newtonian reflector
Sidara Essential Manual alt-az with worm gears on both axes 102mm refractor, 130mm Newtonian reflector
Sidara Plus Medium-duty manual alt-az 127mm refractor, 150mm Newtonian reflector
Sidara Pro GoTo alt-az, battery powered 80mm refractor, 102mm refractor, 127mm Maksutov-Cassegrain

What the packages have in common:

  • Two eyepieces, 25mm and 10mm Plössls. The magnification each gives depends on the telescope's focal length, from 20x and 50x on the Nano 114 to 76x and 190x on the Pro 127.
  • SkyAssist, Explore Scientific's navigation app, with a bracket that holds your phone on the telescope. Every package except the Pro 127 also includes a clip adapter that holds a phone at the eyepiece.
  • A solar filter in every package except the Pro 127: a cap that fits over the front of the tube, marked "Read Directions Before Use". Follow its directions before you point the telescope anywhere near the Sun. NASA warns that viewing any part of the bright Sun through a telescope without a special-purpose solar filter secured over the front of the optics will instantly cause severe eye injury.

Sidara Essential 130 package contents laid out: the 130mm reflector tube, Essential mount and tripod, slow-motion cables, two eyepieces, phone adapters and the yellow-rimmed solar filter

What Is SkyAssist?

SkyAssist is the navigation app behind every Sidara package, and it does a different job on the manual mounts than on the Pro.

On the Nano, Essential and Plus mounts, SkyAssist guides you. The package includes an adapter that holds your phone on the telescope, and Explore Scientific describes the app as "designed to take the guesswork out of navigating the night sky": it tells you what you can see and where to find it. These three mounts have no motors, so you move the telescope yourself and use the slow-motion controls to center the target and follow it.

A smartphone held in the SkyAssist bracket on top of the Sidara Essential 102 refractor, beside its 45-degree diagonal and slow-motion control knobs

On the Sidara Pro, SkyAssist drives the mount. Explore Scientific's catalog gives the routine: make sure the mount is level and switch it on, and it uses built-in technology to align itself to true north. Then open SkyAssist, tap connect, choose an object from the app's catalog and tap GoTo. The mount turns the telescope to the target and tracks it as it moves across the sky. The included hand controller does the same job without a phone. Sky & Telescope notes that a computerized mount of this kind combines the simple up-down, left-right movement of an alt-az mount with automatic tracking.

Explore Scientific says to install SkyAssist from your phone's app store, so set it up before your first night out.

Manual or GoTo: How to Choose a Sidara Mount

Sky & Telescope calls the mount "a telescope's most under-appreciated asset", and in the Sidara line it is the first choice you make, because it sets the tier. All four are alt-azimuth mounts, which move up-down and left-right like a camera tripod head. Three are manual and one is GoTo.

The Sidara Nano mount

The Nano is the grab-and-go mount. It has slow-motion controls on both axes, with knurled knobs that Explore Scientific says are easy to turn even with gloves on, and an elevation arm that adjusts to different angles. Its tripod has adjustable legs and a wide footprint. There is nothing to power and no alignment procedure: set up the tripod, attach the telescope and start observing. Explore Scientific pairs it with lightweight telescopes such as the 90mm refractor and the 114mm reflector.

The Sidara Essential mount

The Essential is built around its slow-motion controls. Explore Scientific lists a powder-coated aluminum head with worm gears on both axes, a head that tilts 45 degrees forward or back so the telescope clears the mount when you point straight up, and slow-motion cables that attach to either side of each axis for left- or right-handed use. It carries the 102mm refractor and the 130mm reflector.

The Sidara Plus mount

Explore Scientific calls the Plus its "tried and true, medium-duty alt-azimuth mount with slow-motion controls". It is rated for 15 lb, weighs 16.7 lb (7.6 kg) by Explore Scientific's figure, and carries the two largest manual telescopes in the line, the 127mm refractor and the 150mm reflector. Explore Scientific also suggests the Plus packages for outreach events, where quick adjustments matter.

The Sidara Pro GoTo mount

The Pro is the only motorized mount in the line. It points and tracks through SkyAssist or its hand controller, runs on 8 AA batteries or a power bank, and takes telescopes that use a Vixen-style dovetail. Explore Scientific rates it for 11 lb and gives its weight with the tripod as 13.4 lb (6.1 kg). It carries the 80mm and 102mm refractors and the 127mm Maksutov-Cassegrain, and it is also sold on its own.

The Explore Scientific Sidara Pro GoTo alt-az mount on its tripod, with the hand controller
Manual or GoTo?

A manual mount is ready as soon as the tripod is up, and it never needs batteries. You find targets yourself, with SkyAssist's help, and keep them centered by hand. That is what slow-motion controls are for: Sky & Telescope's buying guide notes that alt-az mounts designed for high power often have finely threaded slow-motion controls that move the telescope smoothly by tiny amounts.

A GoTo mount needs leveling and power before it starts, then finds each target and tracks it for you. That matters most at high magnification, where a planet drifts across the field quickly, and on nights when you want to see many targets in a short session. If you want GoTo, the Pro is the tier. Among the three manual tiers, the telescope you want decides the mount, since each mount comes with its own pair of telescopes.

Refractor, Reflector or Maksutov: Which Sidara Tube?

The second choice is the telescope itself. The Sidara line uses all three common designs, and each one trades something for something else.

Refractors: Nano 90, Essential 102, Plus 127, Pro 80 and Pro 102

A refractor gathers light with a lens at the front of a sealed tube. Sky & Telescope describes refractors as generally low maintenance but quick to get expensive as the aperture grows, and adds that they are more rugged than other designs because their lenses are less likely to come out of alignment. All five Sidara refractors are doublets, with an objective lens of two elements. The three on manual mounts, the Nano 90, Essential 102 and Plus 127, come with a 45-degree erect-image diagonal, which shows the view right side up and correctly oriented, and Explore Scientific includes it so the telescope works for daytime viewing as well as for the night sky.

Newtonian reflectors: Nano 114, Essential 130 and Plus 150

A Newtonian gathers light with a curved mirror at the bottom of an open tube. Sky & Telescope calls reflectors generally the least expensive type for a given aperture, with one catch: you will need to adjust the optical alignment, called collimation, every now and then, more often if the telescope gets bumped around. S&T calls the adjustment straightforward.

In the Sidara line that trade is easy to see. In every manual tier the reflector is both the lower-priced package and the larger telescope. The Nano 114 gathers 60 percent more light than the Nano 90, the Essential 130 62 percent more than the Essential 102, and the Plus 150 40 percent more than the Plus 127. Aperture is the specification Sky & Telescope calls "the most important characteristic of a telescope": a larger lens or mirror collects more light, so fainter objects show and finer detail resolves.

Maksutov-Cassegrain: Pro 127

The Pro 127 folds a 1,900mm focal length into a short tube, with a glass corrector plate at the front and two mirrors inside. Compound telescopes like this offer compact tubes, and their long focal ratios, f/15 here, suit the high magnifications that planetary observing needs. Sky & Telescope also names the flip side: Maksutov-Cassegrains are unable to produce genuinely wide, low-power fields of view. With the included 25mm eyepiece, the Pro 127's lowest power is 76x.

One detail sets it apart: how it focuses. On a typical Maksutov, a knob on the back plate focuses the telescope by moving the primary mirror, and Scopeviews' review of a 127mm Maksutov explains that this arrangement can, in some cases, shift the image when you change focus direction. The Pro 127 keeps its mirror fixed and focuses with a 2-inch rack-and-pinion focuser instead, which Explore Scientific says eliminates mirror wobble. Its optics are fully multi-coated.

Give it time outside before you use high power: Sky & Telescope notes that catadioptric telescopes take longer than any other design to cool to the temperature of the night air, which pristine high-power images need.

Our Picks From Each Sidara Tier

Within each tier the mount is the same, so the choice comes down to the telescope. Here is who each package suits.

Sidara Nano: 114 or 90

Best on a tight budget: the Sidara Nano 114 at $199.99.

The Nano 114 is the lowest-priced Sidara telescope package and the larger of the two Nano telescopes. Its 114mm Newtonian has a 500mm focal length at f/4.4, the shortest focal length in the line, so it is built for wide, low-power views: the included eyepieces give 20x and 50x. With nothing to power and no alignment to run, it is the Sidara to keep by the door for a quick look at the Moon or a bright star cluster.

The Sidara Nano 90 ($299.99) makes the opposite trade. Its 90mm doublet refractor sits in a sealed tube with no collimation needed, and its erect-image diagonal makes it a daytime spotting scope too. The longer 700mm focal length gives 28x and 70x with the same eyepieces.

Explore Scientific Sidara Nano 114, a 114mm Newtonian reflector on the Nano alt-az mount and tripod

Buy the Nano 114 if: you want the lowest-priced Sidara, or a light setup you will carry out often. The Sidara Nano 114 is the place to start.

Buy the Nano 90 if: you want a refractor that needs no collimation and doubles for daytime views. The Sidara Nano 90 does both.

Sidara Essential: 130 or 102

Where most buyers should start: the Sidara Essential 130 at $399.99.

The Essential 130 is the package we would start most first-time buyers with. Its 130mm Newtonian gathers 30 percent more light than the Nano 114, and it rides on the Essential mount, with worm gears on both axes, a tilting head for straight-up viewing and slow-motion cables you can move to either side. The 650mm focal length at f/5 gives 26x and 65x with the included eyepieces, a comfortable pair for star clusters, the Moon and a first look at the planets.

The Sidara Essential 102 ($499.99) puts a 102mm doublet refractor on the same mount. It gives up some aperture to the 130 in exchange for a sealed tube with no collimation needed and an erect-image diagonal for daytime use, and its 660mm focal length gives 26x and 66x.

Buy the Essential 130 if: this is your first telescope and you want enough aperture for star clusters and the brighter nebulae, on a mount with worm-gear slow-motion controls. The Sidara Essential 130 is our pick for most buyers.

Buy the Essential 102 if: you want the same mount with a refractor's sealed tube and daytime views. The Sidara Essential 102 is that package.

Sidara Plus: 150 or 127

Most aperture in the line: the Sidara Plus 150 at $699.99.

The Plus 150 has the largest aperture of any Sidara telescope. Its 150mm Newtonian gathers 40 percent more light than the Plus 127 and 73 percent more than the Nano 114, which shows most on faint targets such as nebulae and galaxies. At 750mm and f/5 it gives 30x and 75x with the included eyepieces, and its useful ceiling of 300x is the highest in the line. The Plus mount, rated for 15 lb, carries it.

The Sidara Plus 127 ($899.99) is the largest refractor in the line: a 127mm doublet at 820mm and f/6.5, with an erect-image diagonal. Its 33x and 82x with the included eyepieces are the highest powers of any manual package.

Explore Scientific Sidara Plus 150, a 150mm Newtonian reflector on the Plus alt-az mount and tripod

Buy the Plus 150 if: faint deep-sky objects are your main targets and you have room to store and carry a 150mm tube on a medium-duty mount. The Sidara Plus 150 gives you the most light in the line.

Buy the Plus 127 if: you want the largest refractor in the line, with a sealed tube and daytime views through its erect-image diagonal. The Sidara Plus 127 is the one.

Sidara Pro: 102, 80 or 127

Best GoTo package: the Sidara Pro 102 at $799.99.

Best for the Moon and planets: the Sidara Pro 127 at $999.99.

All three Pro packages use the same GoTo mount, so the choice is about the telescope.

The Pro 102 is the all-rounder. Its 102mm doublet refractor has the shortest focal length of the three, 660mm at f/6.5, so it shows the widest field with any given eyepiece: 26x and 66x with the included pair. It gathers 63 percent more light than the Pro 80, and its 2-inch focuser takes 2-inch eyepieces as well as 1.25-inch ones.

The Sidara Pro 80 ($599.99) is the lowest-priced Sidara GoTo package. Its 80mm refractor has a long 900mm focal length at f/11.3, which Explore Scientific says gives more magnification for the Moon, the planets and bright star clusters: 36x and 90x with the included eyepieces.

The Pro 127 is the specialist. Its 1,900mm Maksutov-Cassegrain gives 76x and 190x with the included eyepieces, the highest powers in the line, and Explore Scientific describes it as excelling at the Moon, the planets and other detailed targets. Like most Maksutovs, it cannot give the wide, low-power views many deep-sky observers want.

Explore Scientific Sidara Pro 127, a 127mm Maksutov-Cassegrain on the Sidara Pro GoTo mount and tripod

Buy the Pro 102 if: you want the telescope to find and track targets for you, across the Moon, the planets and the brighter deep-sky objects. The Sidara Pro 102 is our GoTo pick.

Buy the Pro 80 if: you want GoTo at the lowest Sidara price and observe mostly the Moon and planets. The Sidara Pro 80 is built for that.

Buy the Pro 127 if: the Moon and planets are what you most want to see, at the highest magnification in the line. The Sidara Pro 127 is the one for that.

The Sidara Packages Compared: Specs at a Glance

The six manual packages:

Specification Sidara Nano 114 Sidara Nano 90 Sidara Essential 130 Sidara Essential 102 Sidara Plus 150 Sidara Plus 127
Optical design Newtonian reflector Doublet refractor Newtonian reflector Doublet refractor Newtonian reflector Doublet refractor
Aperture 114 mm 90 mm 130 mm 102 mm 150 mm 127 mm
Focal length 500 mm 700 mm 650 mm 660 mm 750 mm 820 mm
Focal ratio f/4.4 f/7.8 f/5 f/6.5 f/5 f/6.5
Mount Nano, manual Nano, manual Essential, manual Essential, manual Plus, manual Plus, manual
With 25mm eyepiece 20x 28x 26x 26x 30x 33x
With 10mm eyepiece 50x 70x 65x 66x 75x 82x
Useful ceiling 228x 180x 260x 204x 300x 254x
Diagonal Not used 45°, erect image Not used 45°, erect image Not used 45°, erect image
Focuser 1.25 in 1.25 in 1.25 in 1.25 in 1.25 in 1.25 in
Solar filter Included Included Included Included Included Included
Power None needed None needed None needed None needed None needed None needed
Price $199.99 $299.99 $399.99 $499.99 $699.99 $899.99

The three GoTo packages:

Specification Sidara Pro 80 Sidara Pro 102 Sidara Pro 127
Optical design Doublet refractor Doublet refractor Maksutov-Cassegrain
Aperture 80 mm 102 mm 127 mm
Focal length 900 mm 660 mm 1,900 mm
Focal ratio f/11.3 f/6.5 f/15
Mount Pro GoTo Pro GoTo Pro GoTo
With 25mm eyepiece 36x 26x 76x
With 10mm eyepiece 90x 66x 190x
Useful ceiling 160x 204x 254x
Diagonal 1.25 in 1.25 in 2 in
Focuser 2 in 2 in 2 in, rack-and-pinion
Solar filter Included Included Not included
Power 8 AA or power bank 8 AA or power bank 8 AA or power bank
Price $599.99 $799.99 $999.99

Magnification is the focal length divided by the eyepiece's focal length, rounded to the nearest whole number. The useful ceiling is twice the aperture in millimeters, the point past which Sky & Telescope says no more detail shows. Explore Scientific's catalog gives mount weights rather than package weights: 16.7 lb (7.6 kg) for the Plus mount and 13.4 lb (6.1 kg) for the Pro mount with its tripod. The manual packages carry Explore Scientific's Limited Lifetime Warranty; on the Pro packages the electronic components are covered for two years and the rest under the Limited Lifetime Warranty.

How Much Magnification Do the Included Eyepieces Give?

Magnification is the telescope's focal length divided by the eyepiece's focal length. Because every Sidara package comes with the same 25mm and 10mm eyepieces, the magnification you start with depends entirely on the tube: from 20x and 50x on the Nano 114 to 76x and 190x on the Pro 127. Our guide to telescope specifications explains how focal length, focal ratio and magnification fit together.

How far you can usefully go is set by aperture. Sky & Telescope puts the limit at about 50x per inch of aperture, twice the aperture in millimeters: beyond it no more detail shows, and larger telescopes, more affected by unsteady air, may top out well below it. That limit is the useful ceiling row in the tables above.

On every package except the Pro 127, the included 10mm eyepiece gives between 50x and 90x, well under what the telescope can use, and planetary detail calls for higher power. That makes a higher-power option the most useful first addition. Explore Scientific's 1.25" 2x Focal Extender ($119.99) doubles the magnification of each eyepiece used with it: on the Nano 114 the pair becomes 40x and 100x, and on the Essential 130, 52x and 130x. On seven of the nine packages the 10mm with the extender stays under the useful ceiling. The exceptions are the Pro 80, where the 10mm and extender together would give 180x against a 160x ceiling, and the Pro 127, which already reaches 190x with the 10mm alone.

For a fuller set, our guide to telescope eyepieces covers focal length, apparent field and eye relief.

Other Ways Into the Line: FirstLight 80 Packages and the Mounts Alone

FirstLight 80mm on the Sidara Nano

Explore Scientific also sells its FirstLight 80mm f/8 refractor as a package on the Sidara Nano mount, in two versions. The standard FirstLight 80mm package ($209.99) has an 80mm doublet with a 640mm focal length and a built-in dew shield, a 90-degree diagonal, one 25mm Plössl eyepiece (26x), a red dot finder, a smartphone adapter and downloadable planetarium software.

The FirstLight 80mm Carbon Fiber package ($219.99) has the same optics in a carbon fiber-look metal tube with a rack-and-pinion focuser, and comes with more: an over-the-lens solar filter made with Solarlite film, which Explore Scientific describes for safe daytime viewing of sunspots, partial eclipses and planetary transits; a DSLR adapter (you supply the T2 ring for your camera); and front and rear dust covers.

Compared with the Sidara Nano packages, both come with one eyepiece instead of two and a red dot finder, and neither lists a SkyAssist adapter.

The Nano and Pro mounts on their own

The Sidara Nano mount ($99.99) comes with its tripod and slow-motion controls, and Explore Scientific pairs it with small telescopes such as the 90mm refractor, the 114mm reflector and the FirstLight 80mm. The Sidara Pro GoTo mount ($499.99) comes with its tripod and accessory tray, the hand controller and SkyAssist control, and takes telescopes that use a Vixen-style dovetail, up to its 11 lb rating. If you already own a small refractor or Maksutov, the Pro mount is how to add GoTo without buying a second telescope.

Which Sidara Telescope Should You Buy?

For most first-time buyers, the Sidara Essential 130 is the package we would start the conversation with. Its 130mm reflector has the aperture for star clusters, nebulae and the brighter galaxies, the Essential mount gives it worm-gear slow-motion controls, and SkyAssist helps you find targets from the first night.

The exceptions:

If faint galaxies are the goal and you want the most aperture for the money, a Dobsonian is the better route. Sky & Telescope notes that Dobsonian telescopes, reflectors on a simple mount, provide lots of aperture at relatively low cost, and our 8-inch vs 10-inch Dobsonian comparison covers that route. You can see the rest of the range in our Explore Scientific collection.

These cover the next steps, from setting the telescope up to finding your way around the sky:

Frequently Asked Questions

Is Sidara replacing Explore Scientific's FirstLight telescopes?

No. Explore Scientific says "our current lineup will continue to be available and supported," and it describes Sidara as an expansion of its range rather than a replacement. The two lines even meet: the FirstLight 80mm refractor is sold as a package on the Sidara Nano mount.

Which Sidara telescope is best for a beginner?

For most beginners, the Sidara Essential 130: a 130mm reflector on a worm-gear slow-motion mount, with 25mm and 10mm eyepieces and the SkyAssist app to help find targets. The Nano 114 is the lower-priced start, and a Pro package suits a beginner who wants the telescope to find and track targets itself.

Do Sidara telescopes need batteries or power?

Only the Sidara Pro packages. The Pro GoTo mount runs on 8 AA batteries or a power bank. The Nano, Essential and Plus mounts are manual and need no power, and SkyAssist runs on your phone.

Can I use a Sidara telescope in the daytime?

Yes, with the refractor packages on the manual mounts. The Nano 90, Essential 102 and Plus 127 include a 45-degree erect-image diagonal, which Explore Scientific includes for terrestrial as well as celestial viewing. Never point a telescope at the Sun without a proper solar filter: NASA warns that viewing any part of the bright Sun through a telescope without a special-purpose solar filter secured over the front of the optics will instantly cause severe eye injury. Every package except the Pro 127 includes an Explore Scientific solar filter; follow the directions that come with it.

What warranty comes with a Sidara telescope?

The Nano, Essential and Plus packages carry Explore Scientific's Limited Lifetime Warranty. On the Pro packages, the electronic components are covered for two years and the rest under the Limited Lifetime Warranty. Coverage is for the original purchaser buying from an authorized dealer, which AstroTelescopium is, and Explore Scientific asks you to register the product within 60 days of purchase.

Can I put my own telescope on the Sidara Pro GoTo mount?

Yes, if it uses a Vixen-style dovetail and stays within the mount's 11 lb rating, counting the diagonal and eyepiece. The Pro GoTo mount is sold on its own with its tripod, hand controller and SkyAssist control.

What should I add to a Sidara telescope first?

A higher-power option. On every package except the Pro 127, the included 10mm eyepiece gives between 50x and 90x, well under the telescope's useful ceiling. A 2x focal extender doubles both included eyepieces, taking the Nano 114 to 100x and the Essential 130 to 130x, or you can add a shorter eyepiece; our eyepiece guide covers the options.