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Hello all,
Haven't been here in a while, but at least I can comment from experience here. Providing they are well made, EP turrets are a great idea. I had a chance to borrow a Tak unit a few weeks back and had to be physically restrained when it came time to part with it. I noticed no light-loss but I did notice a rise in viewing pleasure, not having to swap ep's all the time. The Tak unit gave the same high quality views with TMB superplanetaries, Televue Naglers and Panoptics, Tak LE's and a range of plossls of varying quality. I would assume here that Zeiss and TEC units would perform equally well. In fact, providing your diagonal mirror is up-to scratch and the turret light-tight and true there is no reason I can think of to NOT use a turret - well, expense perhaps. The only real downside is, AFAIK, that except for one US firm, no one makes a turret with a 2" tube.
If you can afford one, I highly recommend it.
Just my 2 cents.
Peter
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