Stargazer_00 Posted February 19, 2013 Share Posted February 19, 2013 Can anyone explain the nagler types to me? See T4 etc seen some T6 wondered what the difference is Link to comment Share on other sites More sharing options...
E621Keith Posted February 19, 2013 Share Posted February 19, 2013 Have a look at this page on TV's site.http://www.televue.com/engine/TV3b_page.asp?id=21&Tab=_backIn summary T4 - Long eye relief (T4 has 17mm or more)T5 - Widest possible field (longer focal length)T6 - Parfocal, high magnification Link to comment Share on other sites More sharing options...
Stargazer_00 Posted February 19, 2013 Author Share Posted February 19, 2013 Thanks Link to comment Share on other sites More sharing options...
JamesF Posted February 19, 2013 Share Posted February 19, 2013 There was me expecting "There's no difference. They're all lovely!" James Link to comment Share on other sites More sharing options...
alan potts Posted February 19, 2013 Share Posted February 19, 2013 They are all expensive, so in that respect they are the same.Funny thing, Keith pointed out the T6 is High Mag Par focal and they are, they are also perfocal with my 5.5mm Meade UWA.Alan. Link to comment Share on other sites More sharing options...
John Posted February 19, 2013 Share Posted February 19, 2013 There were also T1's and T2's but they are now out of production, replaced by the models that Keith lists. There were never any T3's for some reason.T6's have 7 lens elements while the T4's and T5's have 6. Link to comment Share on other sites More sharing options...
Charon Posted February 20, 2013 Share Posted February 20, 2013 Great link Keith. Link to comment Share on other sites More sharing options...
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