TS Optics 71SDQ review

71SDQ first look TS Optics 71SDQ quadruplet refractor TS Optics 71SDQ quadruplet refractor is somehow new product targeted mainly for portable…


Astro Arduino - part II - weather monitor

So, in the previous part we learned some basics - how to switch pin on and off, and then relays that can control power for devices, or for example…


Astro Arduino - part I

Arduino is open hardware platform that became extremely popular due to its simplicity, free and friendly development environment and massive number…


Narrowband colours

If you are an astroimaging amateur and capturing narrowband frames, you probably already needed to make a decision - how to compose all these…


Dumbbell M27 - deeper look (IOTD)

M27 Dumbbell (aka Apple Core Nebula) was the first planetary nebula to be discovered (in 1764 by Charles Messier). From his notes he reports: I…


High resolution image of M16 Eagle nebula center

Pillars in M16 Eagle Nebula

It is maybe worth to mention at the beginning, that M16 Eagle nebula was discovered neither by Messier nor by Herschel (as usual :) ), but by…


Astro applications CPU hunger

M1 Crab nebula World today is flooded with data. This also applies to astroimaging amateurs. Modern CMOS cameras has a large number of pixels…


Different times of astrophotography

Long time ago we have been doing astroimages with negative (or positive) film. We had one chance to take a long exposure photo. Then we have been…


How good guiding can be

Why we need to guide? Because mount mechanics are of limited accuracy, and once this accuracy is lower than our imaging setup resolution we need…


Pixel scale and resolution

Is astrophotography pixel scale and resolution the same? Can we increase resolution just by making pixels smaller? In some cases we can, but quite…


CMOS gain settings part II

In the first part I made a little introduction on gain setting in CMOS camera and also presented simple comparison made with luminance filter. In…


CMOS gain settings part I

Once we start to image with CMOS cameras, then we need to deal with more settings than with CCD cameras. I described some of them before, but now I…