Vaonis Vespera Pro II

Optics and observing field

50 mm (2 in) aperture sits on an alt-azimuth mount, with the built-in camera sensor controlled through an app. In this group of telescopes, that aperture gathers less light than most of the compared instruments, placing the Vespera Pro II towards the lower end for light grasp (based on aperture size). For your garden, aperture is the key figure here for comparing light gathering, rather than a promise about what any particular target will look like.

The focal length is 245 mm and the focal ratio is f/4.9. Together, these describe the telescope's optical scale and speed, while the sensor's pixel size also matters when comparing fine detail.

The field of view is 1.6° x 1.6°, according to the maker. That square field sits around the middle of the compared telescopes when judged by the longest side of the main camera's field. It gives you a defined framing area for choosing targets and composing images, while the same field dimensions apply across both sides of the square.

Long exposures on an alt-azimuth mount involve field rotation. The mount type therefore belongs in the comparison alongside the quoted field, without changing the field dimensions themselves.

Camera and image files

12.5 MP is the resolution class of the Sony IMX676 image sensor, with a pixel size of 2 µm. Image resolution is 3536 x 3536 pixels. The pixel size and 245 mm focal length place its fine-detail comparison around the middle of this telescope group, judged by the more limiting of optical resolving power and two-pixel sampling. That is a comparison of the stated optical and sensor figures, not a claim about detail in a particular image.

The square image resolution matches the square 1.6° x 1.6° field, so your framing and image dimensions use the same orientation. The sensor's megapixel count and pixel size describe different aspects of the camera: the former gives the image's pixel total, while the latter is the size of each pixel.

See it at VaonisVaonis Vespera Pro II, from £2,599, Typical UK retail price, 23 October 2026

Power, carrying and dew

11 hours of battery life is the maker's quoted figure. Alongside the dew heater, it places the Vespera Pro II ahead of most of the compared telescopes for running through the night independently, using the stated battery duration and hands-off features. The figure is a maker claim, so it serves as a specification for planning rather than an assurance of a particular session length.

The weight is 5 kg, according to the maker. For portability, that places it among the heavier instruments compared, using the carried-out weight and excluding the tripod in the comparison method. This gives you a useful reference when deciding how far to carry the telescope from your house to a garden observing spot.

Internal storage is 225 GB, providing the stated capacity for image files on the instrument. The dew heater is included, a relevant feature when planning a session where dew is a concern. Neither feature changes the quoted optical figures, but each affects a different part of your observing setup: file capacity and equipment management.

Comparison verdict

The Vespera Pro II's 50 mm aperture, 245 mm focal length and square 12.5 MP camera define its place among the instruments compared. Its 11-hour maker-quoted battery life and dew heater support the hands-off specification, while the 5 kg weight is a consideration for carrying it into your garden.