All posts by Star Hunter

Jupiter, May 18, 2019, 00:24.

Nearer Jupiter opposition. The planet began to appear in the sky earlier, but the conditions for its observation still remain unfavorable because of the small altitude. On this night, due to atmospheric turbulence, it was not possible to capture small details. Soon the haze came and the atmosphere deteriorated sharply, we had to stop shooting. However, at least something.

Jupiter, May 18, 2019, 00:24.

Jupiter, May 18, 2019, 00:24.

-Celestron NexStar 8 SE
-Barlow lens cell NPZ 2x
-filter ZWO IR-cut
-camera ZWO 290 MC (50 fps)
Processing: PIPP, Autostakkert (1000 frames from 4500), Registax 6, WinJUPOS (4 videos).
Location: Russia, Anapa, backyard.

Impressions from the filter Optolong L-Pro clip EOS

I am owner of the filter Svbony CLS, that reducing well in strong light pollution, but it’s difficult to get the correct white balance. For shooting in the suburbs, I needed a weak light pollution filter, which carefully cut off the light of sodium and mercury lamps.

Modern technologies make it possible to manufacture filters with a very interesting bandwidth. One of these filters designed for astrophotography is Optolong L-Pro. It selectively attenuates the light of sodium (589 nm) and mercury (578 and 435 nm) lamps, which are sources of urban illumination, and transmits a useful signal from stars and nebulae.

Optolong L-Pro, announced transmission graph

Optolong L-Pro, announced transmission graph

Of course, the light pollution filters are not a panacea – they allow at least something to be photographed under flare conditions, or to significantly reduce the effect of light pollution. The price for this is to increase the shutter speed or sensitivity for confident work on the object in the picture. Unlike the UHC \ CLS \ LPR filters, considered in the Optolong L-Pro review, it can also be used for objects of stellar nature (galaxies, nebulae, clusters). Due to the wide bandwidth, it is much easier to get an correct white balance with the L-Pro filter, since with the CLS \ UHC filter the green channel is almost the same as the blue one.
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Another visual animation of images taken at different wavelengths – 540 and 656.28 nm.

GIF Солнечное пятно AR 2741 континууме (540 нм) и линии водорода, 13 мая 2019 года.
1st image, May 13, 2019, 14:20.
-filter Baader Astrosolar Photo
-telescope Celestron NexStar 8 SE
-filter Baader Solar Continuum
-camera QHY5III178m.
Processing: Autostakkert (250 frames from 3045), Registax 6, Astra Image.

2nd image, May 13, 2019, 14:35.
-telescope Celestron 102 SLT
-homal lens NPZ
-telescope Coronado PST H-alpha 40 mm
-filter Deepsky IR-cut
-camera QHY5III178m
-mount Celestron Nexstar SE.
Processing: Autostakkert (500 frames from 3009), Imppg (deconvolution).

Location: Russia, Anapa, backyard.