#deep-sky

Deep-Sky Astrophotography Rig Example

Here are the core components of a very capable deep-sky imaging rig. (very similar to what I use) Extras include a T-Ring adapter, Field Flattener/Reducer, Light Pollution Filter, Laptop and Software for Camera Control.  An autoguiding system can be added down the road for longer exposures. 

Canon Rebel T6i: http://amzn.to/2uRL2TB

Orion Sirius EQ-G: https://goo.gl/vDTAo1

This is IC 1805 and LBN 667, the Double Nebula, in the constellation of Cassiopeia near the border of Perseus and Camelopardalis.

http://www.astropix.com/Double_Nebulae.html

Click on the link to see a larger version with more information.

Who says you can’t shoot faint emission nebulae with a stock, unmodified, DSLR?

It certainly is much easier to shoot emission nebulae with a modified camera, because the long-wavelength filter has been removed it passes almost all of the wavelengths of hydrogen-alpha light which give emission nebulae their distinctive color.

But you can make up for the wavelengths that get filtered out by just using more exposure. This is the price you have to pay.

A secret to being successful at this is to also use a light-pollution filter. These filters remove other wavelengths from light pollution and airglow and allow longer individual exposures that capture more hydrogen-alpha wavelengths in an individual exposure. Then you just stack a bunch of individual frames to equal one really long exposure – in this case, the equivalent of almost 5 and a half hours of total exposure in a stack of 41 eight-minute single exposures.

The famous galaxy in constellation Sculptor is called The Silver Dollar Galaxy, but it is also known as The Sculptor Galaxy. It is the third brightest galaxy in the sky after the Milky Way and the Andromeda Galaxy.