Levenhuk
Levenhuk Kelvin Bright STR90 Smart Telescope
Levenhuk Kelvin Bright STR90 Smart Telescope
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Levenhuk Kelvin Bright STR90 Smart Telescope
The Levenhuk Kelvin Bright STR90 combines traditional astronomical observation with the capabilities of a modern smart telescope. Its automated system allows for locating, tracking, photographing, and processing astronomical objects from your mobile phone, significantly simplifying entry into astrophotography.
Unlike many smart telescopes exclusively dedicated to digital photography, the STR90 retains the possibility of visual observation using an eyepiece, allowing you to observe the sky while the camera captures images. Its achromatic refractor with a 90 mm aperture and 500 mm focal length (f/5.6) provides a wide field especially suitable for large deep-sky objects, star clusters, and terrestrial observation.
Smart Astrophotography with Real-Time Stacking
The Kelvin Bright STR90 automates one of the most important processes in deep-sky astrophotography: image stacking.
Once the object is selected, the telescope tracks it, successively captures multiple frames, and automatically combines them. The image progressively increases in detail, contrast, and brightness directly on the smartphone screen.
This allows for obtaining color photographs of nebulae, galaxies, and clusters without the need for complex post-processing on a computer, making astrophotography much more accessible for new users.
90 mm Refractor for Large Star Fields
The STR90 is the refractor model in the Kelvin Bright series. Its 90/500 mm optics offer a relatively fast focal ratio of f/5.6, providing a wide field particularly interesting for observing and photographing large celestial structures.
Objects such as the Orion Nebula (M42), the Pleiades (M45), large open clusters, or the Andromeda Galaxy (M31) can especially benefit from this configuration.
The optics use fully multi-coated optical glass, while the main tube is made of aluminum.
Main Optical Features
- Design: Achromatic refractor
- Aperture: 90 mm
- Focal Length: 500 mm
- Focal Ratio: f/5.6
- Maximum Useful Magnification: 180x
- Resolution: 1.3 arcseconds
- Limiting Stellar Magnitude: 11.67
- Focuser: 1.25"
Visual Observation and Photography at the Same Time
One of the most interesting features of the Kelvin Bright STR90 is the ability to combine visual observation and digital capture.
While the guide scope and astronomical camera work on the selected object, the main optical tube can be used for observation through an eyepiece. This way, the experience is not limited to just viewing an image on the phone screen.
The kit includes a 25 mm Plössl eyepiece and a 90° diagonal mirror, so it can be used visually from the first session.
For planetary imaging at a larger scale, the camera can also be installed in the main optical tube.
52 mm ED Apochromatic Guide Scope
The system incorporates an ED apochromatic refractor guide scope with a 52 mm aperture and 255 mm focal length, with a focal ratio of approximately f/5.
Its ED optics and full multi-coating help provide a quality image for the electronic guiding and capture system.
Its field of view is approximately 1.26° × 0.71°.
Sony STARVIS 2 Astronomical Camera
The STR90 incorporates a color astronomical camera based on a Sony STARVIS 2 CMOS sensor, a technology designed to offer high sensitivity in low-light conditions.
Camera Specifications
- Sensor: Sony STARVIS 2 CMOS
- Resolution: 2.1 MP
- Maximum Resolution: 1920 × 1080 pixels
- Sensor Size: 1/2.8"
- Pixel Size: 2.9 × 2.9 µm
- ADC Conversion: 12 bits
- Image: Color
- Internal Memory: 64 GB
The integrated memory allows storing approximately 8,000 images, reducing reliance on a computer during observation sessions.
Over 100,000 Objects at Your Fingertips
The telescope is controlled via the MirroSky mobile application, available for iOS and Android devices.
From your smartphone, you can select a target from a database of over 100,000 astronomical objects.
The system uses the positioning information provided by the application along with its integrated geomagnetic compass to perform alignment and automatically point the mount towards the selected object.
Subsequently, the electronic system makes the necessary corrections to keep the target correctly positioned during observation and capture.
Smart Altazimuth Mount
The set incorporates a computerized altazimuth mount equipped with stepper motors and worm gears on both axes.
It offers movements of up to 3° per second, nine tracking speeds, and a load capacity of up to 4 kg.
The entire assembly rests on a robust steel tripod, designed to improve stability and reduce vibrations during observations and photographic exposures.
Dual-Band Wi-Fi and Mobile Control
Communication with mobile devices can be done via 2.4 and 5 GHz Wi-Fi, offering a fast wireless connection to control the telescope and view images.
Functions that can be managed from the application include:
- Object selection and location
- Automatic tracking
- Image capture
- Frame stacking
- Color correction
- Exposure time
- Viewing images on the smartphone
Compatible with Computers and Specialized Software
Although it can be used without a computer, the STR90 also offers interesting possibilities for users who want to delve deeper into astrophotography later on.
It has PC connectivity and an ST-4 port on the camera, in addition to USB connections.
The camera can work with specialized Windows software such as NINA, SGP, or Maxim DL, providing a path for evolution towards more advanced workflows.
Also for Terrestrial Observation
The wide field provided by the refractor makes the STR90 a versatile instrument for daytime observations.
It can be used to observe birds, landscapes, boats, wildlife, and other terrestrial objects, also transmitting the image to the mobile phone for photographing or sharing.
It should be noted that the optical configuration may produce horizontal inversion of the image. This is not important during astronomical observation, although it may be noticeable in terrestrial objects containing text.
Flexible Power Supply
The mount can be powered by different systems:
- 12 V / 5 A power adapter included
- Compatible 12 V / 5 A external battery (not included)
- 8 AA batteries (not included)
The camera receives power directly from the mount via USB-C.
Key Features
- 90/500 mm refractor smart telescope
- Wide field of view for deep sky
- Focal ratio f/5.6
- Sony STARVIS 2 astronomical camera
- ED 52/255 mm apochromatic guide scope
- Real-time image stacking
- Simultaneous visual observation and astrophotography
- Automated localization and tracking
- Catalog of over 100,000 objects
- Smartphone control
- MirroSky app for iOS and Android
- 2.4 GHz and 5 GHz Wi-Fi
- 64 GB internal memory
- Approximately 8,000 image capacity
- Computerized altazimuth mount
- Integrated geomagnetic compass
- Autoguiding
- Steel tripod
- PC connection
- Compatible with specialized astrophotography software
- Suitable for astronomical and terrestrial observation
- Easy setup
Kit Contents
The Levenhuk Kelvin Bright STR90 is supplied as a complete set consisting of:
- Refractor optical tube
- Guide scope
- Sony smart astronomical camera
- 25 mm Plössl eyepiece
- 90° diagonal mirror
- Smart altazimuth mount
- Steel tripod
- Accessory tray
- Power adapter
- DC to USB Type-C cable
- 2 USB Type-C cables
- Type-C to 5.5 mm adapter
- User guide
- Warranty card
Technical Specifications
| Feature | Specification |
|---|---|
| Optical System | Achromatic refractor |
| Aperture | 90 mm |
| Focal Length | 500 mm |
| Focal Ratio | f/5.6 |
| Maximum Useful Magnification | 180x |
| Resolution | 1.3" |
| Limiting Magnitude | 11.67 |
| Focuser | 1.25" |
| Guide Scope | ED apochromatic refractor |
| Guide Scope Aperture | 52 mm |
| Guide Scope Focal Length | 255 mm |
| Guide Scope Focal Ratio | f/5 |
| Camera | Sony STARVIS 2 color CMOS |
| Resolution | 2.1 MP / 1920 × 1080 |
| Pixel Size | 2.9 × 2.9 µm |
| ADC | 12 bits |
| Internal Memory | 64 GB |
| Mount | Computerized Altazimuth |
| Motors | Stepper with worm gears |
| Maximum Speed | Up to 3°/s |
| Tracking | 9 speeds |
| Load Capacity | 4 kg |
| Wi-Fi | 2.4 / 5 GHz |
| Catalog | Over 100,000 objects |
| Application | MirroSky for iOS and Android |
| PC Connection | Yes |
| Autoguiding | Yes |
| Tripod | Steel |
| Shipping Weight | 16.1 kg |
| Packaging | 78 × 56 × 33 cm |
| EAN | 5905555028446 |
| Reference | 86647 |
Who Do We Recommend the Kelvin Bright STR90 For?
It is an especially interesting option for those looking to combine the experience of a conventional telescope with the convenience of a smart telescope.
Its automation significantly facilitates object location and photography, while the refractor tube and eyepiece maintain the possibility of enjoying traditional visual observation.
Therefore, it is suitable for both beginners who want to get started in observation and astrophotography, and experienced users looking for an automated, versatile, and portable setup for large deep-sky fields.
The Levenhuk Kelvin Bright STR90 thus offers a different approach to exclusively digital smart telescopes: it allows you to automatically locate the sky, observe it with your own eyes, and at the same time, capture and stack photographs from your smartphone.
⚠️ NOTAS DE ADVERTENCIA
GAFAS PARA LA OBSERVACIÓN DE ECLIPSE
- INSTRUCCIONES: Revise antes de cada uso. No utilice ni deseche si está dañado, rasgado, perforado o separado de alguna manera del marco. No lo use con otros dispositivos ópticos. No es un juguete. Los niños deben usarlo solo bajo la supervisión de un adulto. Limítese a 3 minutos de uso continuo, con interrupciones durante varias horas. No se mueva mientras usa este producto, no conduzca un vehículo ni opere maquinaria. No lo use si tiene un ojo enfermo o después de una operación ocular.
- ADVERTENCIA: Nunca mire directamente al sol sin protección ocular especial. Siempre use gafas de eclipse al observar el eclipse solar, especialmente si una parte del sol es visible. Mirar directamente al sol puede causar daños permanentes si no se toman las precauciones adecuadas. Se debe usar protección ocular adecuada, diseñada específicamente para la observación solar, para evitar que los rayos dañinos del sol lleguen a los ojos. Deséchelo después de 3 años y no lo utilice después de ese tiempo.
OBSERVACIÓN SOLAR CON TELESCOPIO
- Nunca mire al sol a través de un ocular/telescopio sin un filtro de protección verificado. Un filtro lunar nunca puede usarse para la observación solar. El filtro lunar solo es adecuado para la observación de la luna. El filtro solar debe montarse en la apertura del telescopio, no en el ocular. De lo contrario, el rayo de luz concentrado por la óptica destruirá inmediatamente la película del filtro, lo que provocará daños oculares graves e incluso ceguera total.
- Revise el filtro solar antes de cada observación solar y asegúrese de que no esté dañado. Manténgalo frente a una fuente de luz intensa para poder detectar posibles grietas y/o agujeros. No use el telescopio para la observación solar, incluso si el filtro solar está solo ligeramente dañado. En este caso, comuníquese con el fabricante para obtener las piezas de repuesto correspondientes.
- Siempre use el filtro solar cuando observe el sol. Asegúrese de que este filtro esté colocado correctamente en el telescopio según las instrucciones. El uso del filtro solar está destinado únicamente para su uso con este telescopio.
- Revise el ajuste del filtro solar antes de cada observación solar. Si se suelta accidentalmente de la abertura del objetivo, esto puede causar daños oculares inmediatos y permanentes, e incluso ceguera.
- Si el filtro solar no puede montarse de manera suficientemente firme en el tubo, mejore el ajuste colocando varias tiras de fieltro autoadhesivas o similares entre el filtro solar y la abertura del objetivo. Nunca use el filtro solar si no puede colocarse correctamente en el telescopio. En tal caso, siempre contacte primero con nuestro servicio al cliente.
- Tenga mucho cuidado al observar el sol. Incluso una mirada corta a través de la óptica sin protección puede causar daños oculares graves e incluso ceguera total.
- Los niños, incluso con el filtro montado correctamente, no deben mirar al sol a través del telescopio. Nunca deje a los niños sin supervisión.
- Nunca deje la óptica sin supervisión. Los niños y los adultos inexpertos podrían dirigir el telescopio hacia el sol sin las precauciones adecuadas y perder la vista.
- No realice observaciones solares sin la consulta previa de un médico después de una operación ocular o cualquier otra enfermedad ocular.
- Las ondas/pliegues en la película son normales y no constituyen un defecto del producto.
- No exponga el dispositivo a altas temperaturas.
ADVERTENCIAS Y SEGURIDAD DE LAS PILAS
- NO USE pilas falsas en los productos. Use solo las pilas proporcionadas. Use la pila EXCLUSIVAMENTE para el propósito previsto.
- Guarde las pilas fuera del alcance de los niños y mascotas.
- NO USE pilas que parezcan tener la carcasa dañada, inflada o modificada. No use pilas que hayan goteado, huelan, estén hinchadas o derretidas o presenten abolladuras, óxido, grietas o rayones.
- La pila NO debe ser desmontada, aplastada, perforada, triturada ni manipulada de ninguna otra forma.
- La pila NO debe exponerse a líquidos.
- No debe intentar secar una pila mojada o húmeda con un dispositivo o fuente de calor.
- El dispositivo o la pila NO deben ser colocados cerca de una fuente de calor o bajo la luz solar directa.
- La pila NO debe tocar objetos metálicos.
- La pila NO debe ser almacenada junto a materiales peligrosos o inflamables. Guarde la pila en un lugar fresco, seco y bien ventilado.
- La pila NO debe insertarse incorrectamente al cargarla.
- La pila NO debe cargarse bajo luz solar directa ni a temperaturas extremas. Cárguela a temperatura ambiente (20 °C – 26 °C).
- Evite dejar caer la pila o el producto. Si sospecha que la pila está dañada, reemplácela.
- Nunca deje su dispositivo conectado a la corriente más de 24 horas. Deje que la pila se agote y luego recárguela.
- Para obtener los mejores resultados, reemplace las pilas según el uso después de 12 meses o antes.
- Siga las regulaciones locales para la eliminación de las pilas usadas. NO arroje la pila al fuego ni al agua.