Finally completed the processing of one of the Orion shooting sessions. Perhaps, from the tenth approach we managed to get a more or less satisfactory result and pull out many faint nebulae. The filming took place in the city, and I used the Svbony CLS clip filter to suppress flare.
-Samyang 135\2.0 ED Canon EF
–Svbony CLS clip EOS-C
-mount Sky-Watcher Adventurer
38 frames per 120s, ISO 400.
Calibration and stacking at DeepSkyStacker.
Scale: 25%. At links – in scale 50% и 100%.
Place: Russia, Anapa, backyard.
Image without filter and with filter:
The CLS filter does very well with flare, although the gap between the green and red areas is still felt during processing. To obtain a satisfactory balance of colors is still a task, the difference between the blue and green channels is minimal, therefore it turns out almost bicolor. For shooting flat with CLS-filter is better to use a white light source. In addition, the Samyang 135 \ 2.0 ED lens began to produce noticeable red halos, the red channel is noticeable out of focus. Nevertheless, it is quite possible to do astrophotography in the city with a filter, albeit with a few nuances.
CLS-filter for Canon APS-C cameras can be purchased at the office. Svbony Store on Aliexpress по ссылке.