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Old 12-08-2009, 06:04 AM
jamespierce (James)
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Join Date: Jul 2009
Location: Australia
Posts: 321
EPs for Tak 90mm APO (Ethos vs Naglers)

Here's my dilemma folks I'm looking to buy a simple set of 'nice' EPs to go with our Tak SKY 90mm which is basically our do everything, traveling and get out there and look at stuff scope. Lets say the budget is a little over $1K AUD.

Combos I'm considering:

TV Ethos 10mm
TV Nagler 3-6mm

TV Nagler 16mm
TV Nagler 9mm
TV Nagler 3-6mm

TV Nagler 13mm
TV Nagler 7mm
TV Nagler 2-4mm

The combinations are much the same price, my heart says get the ethos and a zoom for planetary and high power work with the ethos being the 90% usage case. 50x mag and a 2 degree field is really versatile for a smallish refractor.

My logical brain worries about the huge size difference and issues with balance etc switching between EPs, also the naglers give a bit more flexibility with magnification also. Is there another option I'm missing ?

For the nerds - here are the calcs on the various EPs I've considered. The 13mm Ethos and 17mm Nagler were in the mix for a while, but a true field of more than 2 degrees can wait I think, perhaps later we'll add a really wide EP like a 17mm Ethos etc or a 20+mm Nagler later.

http://posterous.com/getfile/files.p...caled.1000.jpg
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