Owl Astro is an astrophotography planner: framing with your field of view, a horizon profile per site, targets ranked per night by altitude, moon and cloud forecast, and guides on getting more out of every clear night.https://owlastro.com/https://owlastro.com/guides/long-exposures-vs-multiple-short-exposures/https://owlastro.com/guides/long-exposures-vs-multiple-short-exposures/Many short exposures or fewer long ones? Under light-polluted skies it barely matters; under dark skies longer subs win on SNR. The maths and a dark-site test.Sat, 10 Dec 2016 00:00:00 GMTexposuresignal-to-noisestackingdslrhttps://owlastro.com/guides/imaging-the-pleiades/https://owlastro.com/guides/imaging-the-pleiades/The Pleiades look easy, but bright stars and faint dust make M45 a dynamic range challenge. Tips for capturing and processing it with colourful, unclipped stars.Sat, 26 Nov 2016 00:00:00 GMTtargetsm45dynamic-rangeprocessingpixinsighthttps://owlastro.com/guides/best-iso-for-dslr-astrophotography/https://owlastro.com/guides/best-iso-for-dslr-astrophotography/ISO doesn't make your sensor more sensitive. How ISO affects read noise and dynamic range, and how to find the best ISO for your own DSLR.Sat, 29 Aug 2015 00:00:00 GMTisoread-noisedynamic-rangedslrhttps://owlastro.com/guides/pixinsight-basic-dslr-workflow/https://owlastro.com/guides/pixinsight-basic-dslr-workflow/The four stages of processing DSLR data in PixInsight, from calibration and stacking to the stretch and the final touches, with the settings I start from.Sat, 08 Aug 2015 00:00:00 GMTprocessingpixinsightworkflowdslrhttps://owlastro.com/guides/nikon-vs-canon-for-astrophotography/https://owlastro.com/guides/nikon-vs-canon-for-astrophotography/Canon is the default DSLR for astrophotography, but sensor tests tell a different story. Colour depth, dynamic range and low-light scores compared.Sun, 20 Jul 2014 00:00:00 GMTcamerasdslrsensordynamic-range