3D printing Bahtinov masks and lens mount rings

Recently I found out that a number of Toronto libraries have 3D printers available to the public. Printing there is extremely cheap. A fee of $0.10 per one gram of filament (printing material) is charged for each print job. Your only task is to find a model to print. Luckily, thingsverse.com is a website that has […]

Fastest and cheapest polar alignment method

Instead of spending on a polemaster, Im gonna try attaching the QHY5LII-M to the back of the orion 8×40 finderscope and use the SharpCap polar aligning feature. My ST80 has too narrow field of view as Sharpcap needs between 1 and 4 deg FOV. To attach the camera, I unscrewed the eyepiece part of the […]

Fixing Field Curvature using Reducer Corrector

I purchased a second hand reducer corrector for my ED80. It cost almost as much as the refractor itself, but its worth it To flatten the field and also to increase your f/ratio, the ED80 offers a dedicated Reducer/Corrector 0.85x. Not only does it lower the f/ratio of the scope from f7.5 to f6.3, but […]

The path to Guiding

Entry level equatorial mounts don’t tack accurately for longer than 60 seconds. It gets even harder to track precisely with longer focal lengths. Guiding is the answer and my next major goal in improving the astrophotography setup. By guiding, you can keep exposing for much longer times (5-15min and even beyond). That will allow you […]

Building a Flat Frame Box

Stacking images to increase SNR (signal to noise ratio) is a fundamental task of astrophotography. Aside from the light frames, which are the actual image data, there are also 4 types of calibration frames: Bias, Darks, Flats and Dark Flats. In order to remove vignetting and any uneven field illumination caused by dust or smudges found […]