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Hi Phil
I appreciate the vote of confidence in the LE's.
I agree that in a stand-alone comparison the LE 5mm is probably better than the TV Nagler Zoom at a 5mm setting. However, based upon the praise for the Nagler Zoom I suspect this margin of superiority at a 5mm setting alone is likely to be close.
However, what I am really keen to know about is what is the optical performance of an Tak LE likely to be when coupled with some sort of good quality barlow? Will this margin of superiority in the LE remain when coupled with barlows and thus introducing many more lens elements?
The reason I pose this question is that I am primarily thinking of using either a 5mm LE or TV Nagler Zoom with some super short focal length refractors like the TV-60 or Tak FS-60CB which both only have about 360 F/L. Consequently, to get up to some higher magnifications I will need something like the 3-6 Nagler Zoom or a LE 5 or 7.5mm coupled with a barlow.
Both the TV Zoom and LE's have good reputations, use 5 lens elements in three groups, have 10mm of ER and the TV Zoom has 50 vs 52 AFOV in the LE. However, getting to the crux of things - what will the optical quality of the LE's be like when coupled with a barlow/powermate/extender Q to acheive a shorter focal length which the TV Zoom can achieve with it's original 5 lens elements?
Any thoughts?
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