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Hello Steffen & Astro744
I am very appreciative of both your comments. The frustrating thing for me is I can't try or compare before I have to buy. Both the TV Nagler Zoom and Tak LE’s come with equal praise. The Nagler zoom costs a bit more but I would expect it to given it can change to other focal lengths.
I am thinking of this choice purely in terms of one long-term investment (irrespective of price) for an eyepiece that will give me optimal overall optical performance and still has at least 10mm of ER.
Both the Tak LE and the Nagler zoom use 5 lens elements in three groups. Ironically, my suspicion is that the LE 5mm would optically be the better eyepiece at the 5mm focal length. However, herein begins my consternation.
While the Tak might be better at 5mm to get it to other focal lengths will require barlows etc and in essence I am introducing more lens elements which will potentially diminish it’s performance at other focal lengths. Thus, while the Tak LE might be better at 5mm, the Nagler zoom might actually be optically superior overall because it achieves all possible focal lengths utilising only its original 5 lens elements.
Any ideas/opinions from anyone on this?
Last edited by Profiler; 11-09-2010 at 10:03 AM.
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