Old 06-07-2013, 10:44 PM
l3gendluk3 (Luke)
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Join Date: Jul 2013
Location: Perth
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DSI not focusing

I recently got a DSI imager from my teacher to play around with at home but when I try to focus it on Saturn, I have to turn my focus knob all the way in and it still doesn't focus right. I asked my friend and he said that I needed a barlow lens or a focal reducer but didn't know which one. Can anyone help?

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Old 07-07-2013, 12:06 AM
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White Rabbit
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Location: Sydney
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You need an extension tube to give you the correct back focus. If you have access to a Barlow, unscrew the the lens part of it and you insert it between the camera and telescope. Living the lens in how ever may prove beneficial when imaging planets.

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Old 07-07-2013, 01:31 PM
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What scope are you trying to use the DSI in? How are you attaching the DSI ?

Different scopes will have different reasons for not getting focus....
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