обзоры

JJ-Astro (Oberwerk) 22×100 binocular review

JJ-Astro (Oberwerk) 22x100

JJ-Astro (Oberwerk) 22×100

Visual observations of celestial objects are perhaps the most impressive and romantic part of amateur astronomy. Not a single photo can replace sensations from what is visible with eyes. In this regard, binocular astronomy has its advantages, since when viewed with two eyes at the same time, the limiting stellar magnitude is noticeably improved. Check it is very simple – look at the night sky, first with one naked eye, and then with two. Despite the fact that space objects are so far away that the stereo effect does not manifest itself, binocular observations allow you to immerse yourself in observations, relax your eyes and calmly peer into the image.

On New Year’s Eve, I decided to upgrade the equipment a bit and upgrade from the ZOMZ BPC 20×60 binoculars to a larger aperture. Large Celestron binoculars immediately disappeared due to the unstable quality of the products, namely, poor and unstable collimation in at least three binoculars of my friends (two copies 20×80 and one 25×100). Based on good reviews, the choice fell on JJ-Astro 22×100 binoculars, also known as Oberwerk. Unfortunately, the device has already been discontinued and can only be purchased on the secondary market. This is an astronomical binocular with central focusing, Porro scheme and without a break in the axis.

Читать далее…

Обзор простого спектроскопа с Aliexpress

Для тестирования астрономических фильтров решил приобрести недорогой спектроскоп. На Aliexpress есть несколько видов – подороже (металлические, от 2000р) и подешевле (пластиковый, до 500р). На основе отзывов я выяснил, что дешевый спектроскоп даже лучше за счёт более узкой щели.  Заказал – с доставкой ePacket посылка из Китая доехала до Анапы всего лишь за 16 дней.
Читать далее…

Hikvision HV0733D-6MP (7-33 мм, F0.95) review

Hikvision HV0733D-6MP

Recently I received a unique Hikvision HV0733D-6MP lens for testing. It is designed for security cameras with CS mount. The main feature is F number (F0.95) over the entire focal length range (7-33 mm), as well as support for a 1 \ 1.8 “sensor and a resolution of 6 Mp. Of course, you can use sensors with a smaller size and resolution. With excellent F number it is desirable that the matrix was back-illuminated. It feels like the lens was specially designed to work with the Sony IMX178 CMOS sensor. What could be such an interesting lens for astrophotography? Of course, this is a shooting of meteors in real time. When using 1\1.8 ” matrix and focal at a distance of 7 mm, the field of view of the lens is 51×35 degrees (60 degrees diagonal). Also, with such aperture, shooting of extended nebulae with narrow-band filters looks very tempting, but the filter will have to be installed in front of the lens. Testing will show how good this lens is by the stars. Читать далее…