Prism binoculars with a magnification of up to 7x represent a separate class of devices. These are compact binoculars with a large field of view and a limited use. Of the fairly well-known models, I can recall offhand soviet БПЦШ 6×30, Bushnell 4×30 Xtra-wide, VisionKing 5×25, Kowa 6×30, Pentax Papilio 6.5×21. How can such “kids” be useful for astronomy lovers? Firstly, the study of constellations. With low-magnification binoculars, one can easily identify faint stars in the constellation, pave the “star track” to search for a nebula or galaxy, and due to the small magnification, shaking hands is almost imperceptible, which greatly increases the convenience of observation and the limited visible magnitude of the binoculars. Well, of course, the observation of wide star fields and the brightest areas of the Milky Way personally gives me great aesthetic pleasure.
Recently on sale I noticed an interesting model – Veber Prima 5×20. It interested me in a small magnification, a sufficiently large exit pupil (4 mm), long eye relief 16.2 mm, and also the declared coating of all optical surfaces. This is a small prism binoculars reverse Porro system. Unlike the roof- and classic Porro binoculars, the reversing binoculars have less distance between the lenses than the interpupillary distance of the eyes. This leads to reduced stereoplasticity (volume) of the image. In some cases, this can even be useful – for example, in a theater, or when observing nearby objects (<1 m). In addition, binoculars with a reduced stereo base are very compact.
The result of another Perseid hunt. For shooting, I decided to get to the village of Anapskaya to the north-east of Anapa. The conditions were not very good. The almost full moon illuminated half the sky. Mosquitoes and dew interfered. There were few meteors. I managed to see a fast and bright green meteor, the trace after which was visible still held for several seconds.
Perseid meteor shower, August 13, 2019, 00:31-01:56 (UTC +3)
-cctv lens2.5 мм f\1.2.
-camera QHY5III178m (bin2 mode, 1528х1024@5fps, 200 ms)
Stacking at StarStax.
Location: Russia, Anapskaya.
Perseids are perhaps the most famous meteor shower. It is active from July 17 to August 24, its peak falls on August 12. The material for the flow is tiny particles of the Swift-Tuttle comet. Perseids are distinguished by high brightness, speed and multiplicity. Under favorable conditions, from 50 to 120 meteors can be counted per hour of observation. Fireballs belonging to this meteor shower are frequent.This year I decided to photograph meteors through the QHY5III178m monochrome camera with a 2.5mm f\1.2 wide-angle CCTV lens. This bundle provides an almost 180-degree view of the sky, excellent sharpness and good penetration.
Perseid meteor shower, August 12, 2019 00:32-02:40 (UTC +3)
In previous years, I recorded videos in an uncompressed format, because of which an hour of video could take several tens of gigabytes.However, it turned out that Firecapture can record JPEG files.This significantly reduced the size of the files, and their quality is quite sufficient for detecting and detecting meteors.
After I captured about 74,000 frames in 2 hours, I somehow lost the desire to look at them all in search of meteors, since this is a very long and tedious task.I began to look for a program for adding frames so that stars would be obtained by tracks, and traces of meteors would remain in the picture.Sequator, alas, throws an error and closes.But StarStax perfectly put together frames and left meteors.