Hit enter after typing the number to save. To add your telescope or lens, click the telescopes tab, then click “Add.” Name the telescope whatever you want, just like above with eyepieces, and add in the values. The telescopes tab is where you will add in your telescopes, or if you are using a DSLR lens you’ll add it here. If you require these with your setup, you’ll add it here. The lens tab is for Barlow lenses and focal reducers. Hit enter after typing the number to save, there is no save button.
Next, you’ll want to add in the values from the manufacturer’s website. In the eyepiece list, go to the bottom and click “Add.” You can name the eyepiece whatever you want, but it is easier to name it whatever it actually is.
When adding gear to Stellarium, you will use the Oculars configuration windows, which can be opened in the upper right of the screen. Special Note: I did not know the above formula when I recorded the video, please do use the formula for an accurate representation of your field of view.Ĭameras: For both dedicated astrophotography cameras and DSLR cameras, you will need the Resolution (x/y) in pixels and the chip width and height in millimeters. At 300 mm, the same lens would appear different: 300/6.3 = 47.62 An example would be using a 70-300mm 4-5.6 lens, stopped down once to get sharper stars. If you are using a zoom/telephoto lens, this matters since zooming does change the diameter of view. You’ll want to round to the nearest hundredth.Īn example for the Rokinon 135mm lens: 135/ 2.8 = 48.20. To get an accurate diameter, you’ll want to use this formula: Focal Length / f-stop = Diameter. Telescopes and DSLR Lens: Diameter and Focal Length.įor DSLR Lenses: The diameter listed on most websites is related to the size of filter you need, if you plan on using a filter for daytime use, it is not the diameter needed for Stellarium. Specs You’ll NeedĮyepieces: Apparent Field of View (aFOV) and Focal Length It might take some digging if websites aren’t forthcoming with the specifications, but you can usually find them fairly easily. For example, the below Zhumell 30mm eyepiece is actually a GSO eyepiece with Zhumell branding.
If you can’t find specifications for your brand, look for another that looks exactly like it. Tip: There are a small number of manufacturers of telescope components worldwide. Before adding your gear, go to the manufacturer’s website or a store website to look for the specifications for each item.
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