Celestron Astro Fi 102mm f/13 Maksutov-Cassegrain Telescope

BH #CEA102WIFIMK • MFR #22202
Celestron Astro Fi 102mm f/13 Maksutov-Cassegrain Telescope
Key Features
  • 102mm Maksutov-Cassegrain OTA
  • 1325mm Focal Length, f/13 Focal Ratio
  • 1.25" 10mm and 25mm Eyepieces
  • Single-Arm Motorized Alt-Az Mount
Free yourself and your astronomy sessions from cords with Celestron's Astro Fi 102mm f/13 Maksutov-Cassegrain Telescope. It utilizes an integrated antenna to emit a local Wi-Fi signal so you can control the mount via direct wireless connection with Android and iOS smartphones and tablets running the free SkyPortal app.
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Celestron Astro Fi Overview

  • 1Description
  • 2Optical Tube
  • 3Computer Control
  • 4Mount & Tripod
  • 5Included Accessories

Free yourself and your astronomy sessions from cords with Celestron's Astro Fi 102mm f/13 Maksutov-Cassegrain Telescope. It utilizes an integrated antenna to emit a local Wi-Fi signal so you can control the mount via direct wireless connection with Android and iOS smartphones and tablets running the free SkyPortal app.

Optically, the scope sports a design similar to the more common Schmidt configuration, but this Maksutov variation exchanges the front corrector plate for a convex meniscus lens, which eliminates the need for periodic collimation. Additionally, the nature of the lens requires a smaller secondary mirror that limits obstruction and increases contrast. This optical path results in a slower focal ratio and narrower field of view versus a similar Schmidt-Cassegrain, but the optical benefits makes this an ideal scope for lunar and planetary observation, with the resolution required for splitting binary stars and separating star clusters. This complete observation rig includes the optical tube assembly (OTA), a motorized mount controlled by the app, an aluminum tripod, two eyepieces, a 90° diagonal, and a red dot finder.

The OTA is mounted on a single-arm motorized alt-az mount. Guiding the mount is the SkyPortal app. Packed with over 120,000 objects, it is designed to help users set up quickly and start observing faster. The app offers multiple alignment procedures, it can automatically find objects in the night sky, and it offers guided tours of the most interesting objects overhead on any given night with select audio commentary including histories, mythologies, and NASA images. The mount runs on eight user-supplied AA batteries, and the entire rig assembles and breaks down without the need for tools so you spend less time setting up and more time observing.

Optical Tube

  • 102mm aperture
  • f/13 focal ratio
  • 1325mm focal length
  • Maksutov-Cassegrain optical design
  • Front convex meniscus lens corrects spherical and chromatic aberrations and comas (off-axis aberration) across the entire field of view
  • Smaller secondary mirror versus Schmidt-Cassegrains reduces obstructions and increases contrast
  • Fully coated optics reduce light loss for increased image brightness and improved color fidelity and contrast
  • Resolution: 1.37 arcsec, Rayleigh; 1.14 arcsec, Dawes Limit
  • Internal focusing mechanism

Computer Control

  • Integrated Wi-Fi:
  • Directly connects to tablet or smartphone
  • Control mount via free SkyPortal app for Android 4.0 and higher and iOS 6 or later
  • SkyPortal App:
  • 120,000+ object database
  • Includes: Sun, Moon, planets, star clusters, nebulae, galaxies, asteroids and comets, satellites, and the International Space Station
  • Custom SkyTour of all the best celestial objects to view based on the time, date, and location
  • Simulate the night sky up to 100 years in the past or future to plan an upcoming observing session
  • Compass Mode: Hold device up to the night sky and identify objects such as stars, planets, and galaxies; zoom in to view fainter objects not visible to the naked eye
  • Night Vision Mode: Preserves night-adjusted vision
  • Alignment Procedures: SkyAlign, 3-Star, Solar System
  • Tracking Rates: Sidereal, solar, and lunar; automatic tracking for near- and deep-sky objects
  • Multiple slew speeds: 3°/sec maximum
  • View hundreds of astronomical photographs and NASA spacecraft images
  • Listen to more than four hours of audio narration to learn the history, mythology, and science of astronomy and the night sky
  • Works as a stand-alone planetarium app

Mount & Tripod

  • Mount:
  • Motorized single-arm alt-az
  • Runs on eight user-supplied AA batteries
  • Quick release base, OTA, and accessory tray with rapid no-tool setup
  • Tripod:
  • Adjustable height
  • Lightweight and durable two-section aluminum legs
  • Spiked feet for steady footing on soft ground
  • Center tray holds accessories such as eyepieces and filters while adding stability and reducing vibrations

Included Accessories

  • Eyepieces:
  • 1.25" barrel diameter
  • 25mm produces 53x magnification
  • 10mm produces 132x magnification
  • Diagonal:
  • 90° angle places head at a comfortable viewing position when OTA is pointed at or near the zenith
  • Star diagonal vertically corrects image for terrestrial viewing
  • StarPointer Finderscope:
  • 1x magnification
  • Red dot reticle
  • Variable intensity
  • Unmagnified wide field of view to make alignment faster and easier
UPC: 050234222020

Celestron Astro Fi Specs

Optical Tube Assembly
Optical DesignMaksutov Cassegrain
Aperture102 mm / 4"
Focal Length1325 mm
Focal Ratiof/13
Eyepiece Barrel Diameter1.25"
Diagonal90° Star
Optical Tube DimensionsLength: 11" / 27.9 cm
TypeMotorized; Alt-Azimuth Single Fork
GoTo CapabilityYes, Computerized GoTo
Material of TripodAluminum
Batteries8 x AA
Wi-FiYes (Built In)
Weight13.6 lb / 6.2 kg (Fully Assembled)
Packaging Info
Package Weight23.5 lb
Box Dimensions (LxWxH)35.5 x 17 x 10"

Celestron Astro Fi Reviews

OK for the money

By Gilbert
Rated 3 out of 5
Date: 2021-09-01

A good quality scope for the beginner. I got some surprisingly good views of both Jupiter and Saturn. Very difficult to align.

worst experience

By Yasser
Rated 1 out of 5
Date: 2020-08-03

no one responds,waiting to get response , promise after promise where is my order!!

Good optics Poor WiFi

By Kenneth
Rated 3 out of 5
Date: 2020-03-25

This scope is very portable and easy to assemble. It also has good optics. But the main issues are the WiFi signal and maintaining allignment. I use a Samsung Galaxy J7V android phone. But the wifi signal is not maintained by my android for an adequate period. The least little thing and the signal is lost and I have to start over. Also after aligning with 3 stars and even sometimes more, the goto function does not adequately position the scope to the desired body. I have to use the red dot finder, which is great. This is annoying and is certainly not helpful for astrophotography. I will have to purchase the hand controller to insure more accurate function. Very disappointing!

Good Scope for casual use, few issues

By Shawn
Rated 4 out of 5
Date: 2020-01-26

Bought one in December after using various scopes for over 30 years. Wanted a goto scope to make observing quick on cold winter nights where in CT these offer the best viewing conditions. Was easy to setup but when I powered it up no power turns out the power plug was loose and I had to tie it around scope to get it to consistently contact, more on this later. I connected to the scope with my iPad just fine and then the second issue I could get it to point at the horizon to align the finder scope. Eventually I got it to the horizon by telling it in app to go as low as it would go and then power cycling the scope upon power-up again I could go a bit lower. Repeated until I got to the horizon. Not sure what this is all about? Issue did not repeat but I always move the scope to the horizon before I power off. Alignment went fine using the Sky Portal App after an initial learning curve. To make this more precise I did purchase a Reticle eyepice to help ensure the target star was in the middle. I found you must be pretty close to have the alignment succeed. Once aligned it was quite close if I used the app to goto an object close to one of the alignment stars however if I went to a very different portion of sky it was off by a 5-10 arc-minutes you can however offset it to bring the desired object into the middle of FOV. Once on an object it tracks the object well enough that several people can look through scope for a few minutes each and the object will stay near center even when using a high magnification like 132X to look at planets in detail. However it does not track well enough for long exposure astro-photography. You certainly could do 20 sec exposures with CCD or 35mm digital camera and stack the exposures in software but longer than 30sec will likely show some motion blur. The optics seem great! Stars are well defined points even at the field edge and lunar features were clear and well defined. For terrestrial use there was no obvious color aberration. All very good for a scope of this price. The build quality of the OTA, tracking mount, and tripod all seem quite good. Mostly made of metal. The focus is very smooth and easy to adjust. The only poor quality part is the battery holder (holds 8xAA) it caused the loose power connection as they used a 2.5x5.5mm plug when the jack on the scope was 2.1x5.5mm. This is a huge QC issue that Celestron should have caught and I speculate has led to many returns. To permanently solve this I bought a 12.6 lithium power pack (6000maH) and a cable that has a 2.1x5.5mm plug that is long enough (ASIN B00DX6ZUBM to make it easy). This fit tight and works reliably. Others have complained of WiFi connection issues although it seems most of this is on Android that seems to want to reconnect to a WiFi that offers internet although this behavior can easily be disabled. The iPad with the latest iOS (13) seems to work fine. Android before 8 seems to work also but my latest phone has Android 8 and although it connects to the scopes WiFi server the app refuses to control the scope. From what I can tell there is no solution yet for this and no clear explanation I could fine for what is happening. On a positive note I was able to side-load the Android Sky Portal app on a low cost Kindle Fire tablet (uses Android like 7.X) and it worked fine. Overall for the price and with my recommendations above to avoid the issues it is a good scope. It has great optics and an adequate goto mount for casual users. It is also easy and quick to use for the beginner again once you get past the initial issues.

Good deal

By Fernando
Rated 4 out of 5
Date: 2019-08-21

Really good price

Perfect for beginner

By Jean-Marc
Rated 5 out of 5
Date: 2018-07-25

As a first-timer, this telescope allowed me to see objects in the sky with great quality, such as the moon, Saturn and its rings, Jupiter with its bands and a few of its moons, and Mars. Amazing experience, I am now addicted. Connecting the telescope to my iPad was as easy as connecting to any wifi network. Aligning the telescope took me about an hour on my first try, but is becoming easier and taking less and less time the more I do it. The app is extremely easy to use. Still getting used to finding the directional buttons on the app while looking through the eyepiece, but definitely not a deal-breaker. I highly recommend this telescope for a beginner.

Great for beginners

By Chad
Rated 5 out of 5
Date: 2021-02-21

We got this as a first telescope and are really enjoying it. Easy to set up and understand, it's a great primer into this world.

Poor wifi signal....

By Manish
Rated 1 out of 5
Date: 2020-09-01

Optics are good...absolutely no complaints, but the computer and wifi are horrible and take the joy out of astronomy......wifi signal never connects, even after updating the firmware....since everything is controlled via an app (which keeps crashing), you pretty much spend all the time try to find the wifi signal instead of watching stars.......instructions are minimal.....Don't waste your money on this....I bought this because I wanted to get in astronomy....will be returning it.

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Can you use a hand controller thru the aux connectors and not just smart phone or tablet just in case say a person's phone or tablet breaks?
Asked by: Anonymous
Yes, you can use a NexStar hand controller through the aux port to control the telescope. Sincerely, Garrett at Celestron
Answered by: Telescope
Date published: 2020-08-09

In the absence of battery or power adapter, can ...

In the absence of battery or power adapter, can this telescope still be adjusted manually if required ?
Asked by: Manish
No, it is not possible to fully adjust the Celestron Astro Fi 102mm f/13 Maksutov-Cassegrain Telescope without power. One needs power for the motorized alt-az mount to adjust the azimuth axis.
Answered by: Yaakov
Date published: 2022-05-26

get smartphone adapter?

get smartphone adapter?
Asked by: Joki
These are available, Celestron Basic Smartphone Digiscoping Adapter (1.25") B&H # CEBSPA125 MFR # 81035 Snapzoom Universal Digiscoping Adapter B&H # SNSZ1.5 MFR # SZ-1.5 Celestron NexYZ 3-Axis Universal Smartphone Adapter B&H # CENEXYZ3ASA MFR # 81055
Answered by: David
Date published: 2021-03-19

What exactly can you see in detail with a ...

What exactly can you see in detail with a telescope like this? Do you just see the moon in more detail, or can you actually see a bit more of the solar system? Sorry, unexperienced person here.
Asked by: Don
From the city, you can easily view craters on the moon, Saturn's rings, and even Jupiter's cloud bands and four of its brightest moons through the Astro Fi 102. From a dark sky site, the telescope will reveal nebulae, galaxies, globular and open star clusters and much more. Light pollution will be your biggest obstacle.
Answered by: Telescope
Date published: 2021-02-02

Is the dc jack that is on the telescope is of ...

Is the dc jack that is on the telescope is of non-standard length ? I couldn't fit any of the existing 12v dc power adapters that I had. Do telescopes have a different jack length ? Is there a way I can use the standard 12v dc power supply with it (using some connectors perhaps ?) . Standard dc jack length is 10mm, while this telescope requires around 13mm. Is that correct ?
Asked by: Manish
The Celestron AC to DC Power Adapter (BH #CEACDCPA • MFR #18778) is the correct power adapter for the Celestron Astro Fi 102mm f/13 Maksutov-Cassegrain Telescope. This is a 12 volt 2A with a 5.5mm DC plug on the end. This plug has an inner diameter of 2.1mm (.08"), and a length of 10mm - 15mm (.39" - .59").
Answered by: Yaakov
Date published: 2022-05-25


How we can connect one photo machine to the Celestron Astro Fi 102mm f/13 Maksutov-Cassegrain Telescope ?
Asked by: carlos l.
If you are referring to Photography cameras we have a number of different T-Mount adapter for a variety of cameras. https://bhpho.to/2njCYde
Answered by: Joseph
Date published: 2019-10-03

a) Can we use a power adapter (dc/AC/Car) with ...

a) Can we use a power adapter (dc/AC/Car) with this if battery runs out ? If yes, which model ?
Asked by: Manish
Yes, there are a couple power options for this. One can use the Celestron AC to DC Power Adapter, BH #CEACDCPA (https://bhpho.to/3yhjx6R). One can also use the Celestron Car Battery Adapter (25'/7.7 m), BH #CECBAU2000 (https://bhpho.to/3vNHf98).
Answered by: Yaakov
Date published: 2022-05-05

Where I view stars there is no internet or ...

Where I view stars there is no internet or cellular service. Can this telescope still track without an internet connection?
Asked by: john
The Astro Fi 102mm telescope emits its own WiFi local signal which can be received by your smart device. You will need to download Celestron's SkyPortal app to align and control the telescope. Once aligned, tracking is automatic, although there are other tracking rates available.
Answered by: Telescope
Date published: 2021-06-08
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