If your eyepiece is smaller than your camera lens, you will experience vignetting. Also, I can't take pictures with the 4mm eyepiece. Despite my complaints, I don't see a better choice for my setup. Of course I get better results with a longer telescope with a 32mm eyepiece and 3x Barlow. My setup: - Telescope Celestron 21024 FirstScope (76mm). - Eyepieces 32mm and 17mm. - 2x Barlow. - Casio EX-FH100 10.1MP high. Speed digital camera with 10x ultra wide-angle zoom. Tips: - First find a point in the sky or in the field with a telescope - Attach the adapter (vice versa when using a reflecting telescope) - Position the camera - Use a low magnification. and wide eyepieces. - Use 2x or 3x Barlow (or a combination of both). - Extend the zoom to infinity (flash off). - Point the camera as close as possible to the eyepiece (without touching it). - Use the camera's timers.
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