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Old 27-04-2007, 09:24 PM
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DaveM
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Join Date: Sep 2006
Location: Perth, Australia
Posts: 176
7mm Nagler or 13mm & barlow?

Hi,
I'm looking to get a Nagler in the 7mm range for a 16" Lightbridge(I already have a 9mm Nagler and a 5mm Stratus) and was wondering if it might be better to Barlow a 13mm Nagler, which gives me 2 useful focal lengths? I have read that the 2.5x Televue Powermate is the best choice for barlowing, but that would give me a 5.5mm focal length from the 13mm, which is not what I am after. In this case, a 17mm Nagler and 2.5x Powermate might be useful.

What experiences do people have with Barlowing or Powermating these eyepieces? I suspect that I should just go for the simple 7mm Nagler, but I'd be interested to hear what other people are doing.

Thanks,
David
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