Tips & Tricks

1.It's best to keep the Penumbra workspace file in the same folder as the FITS images that it points to. That way you can move the whole folder and keep the workspace together with its images.

2.You can create sub-stacks to help you organize your images. For example, if you've taken images on two different nights, you might want to keep each night's images in separate stacks.

3.Right-click on a stack in the left workspace pane for quick access to menu commands.

4.To pick the best images in a stack, use the Up and Down arrow keys to select different images and use the Delete key to remove images that you don't like. Note that Penumbra never deletes or modifies your original FITS files; it merely removes the images from the workspace.

5.Penumbra uses the first image in a stack as the key image to align to. If you need to control this, add the key image to a stack first and then add the remaining images.

6.Penumbra can align images at any rotation but it cannot compensate for images that are at different scales.

7.Occassionally Penumbra will have trouble aligning images. This generally happens when the image has too few stars or (sometime) when it has too many stars. Future versions will allow for manual alignment.

8.When saving "all Uncombined images" with the Meade DSI, remember that Envisage will generate one image for each exposure (uncombined images) and a single stacked image. For best results, use only the uncombined images with Penumbra and do not mix in Envisage's stacked image.

9.Penumbra has been tested with images generated by the original Meade DSI, the DSI Pro, and the DSI II Pro. If you experience problems with your images, please email [email protected].