Barlow Reflection

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Barlow Reflection

Postby Graeme1858 » Thu Oct 25, 2018 11:09 am

Here's a couple of shots of the Moon around Mare Imbrium I took the other night. One with just the camera (Sony Alpha 350) mounted on the telescope and one the same with a x2 Barlow lens. The Barlow shot has a wicked reflection diagonally across it. Is this just because the moon is bright or something else? Can anything be done to avoid it? It's even worse with a x3 Barlow.

191018 A350 Moon X0 Small.jpg
191018 A350 Moon X0 Small.jpg (52.63 KiB) Viewed 923 times


191018 A350 Moon X2 Small.jpg
191018 A350 Moon X2 Small.jpg (52.35 KiB) Viewed 923 times
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Miranda 10x50 Binoculars
Celestron CGX 9.25" SCT
Graeme1858
 
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Re: Barlow Reflection

Postby dave.b » Fri Oct 26, 2018 10:46 pm

Could be internal reflections between the lens elements of the Barlow and/or camera. Lens coatings are designed to reduce such reflections. You could try adding a neutral density filter to the front of the Barlow.
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Re: Barlow Reflection

Postby Graeme1858 » Sat Oct 27, 2018 6:33 am

Thanks Dave. I'll get an ND filter and have another go.

Regards

Graeme
_______________________________________
Miranda 10x50 Binoculars
Celestron CGX 9.25" SCT
Graeme1858
 
Posts: 223
Joined: Tue Jul 24, 2018 2:32 pm
Location: Kent, UK, 51°28’N 0°38’E


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