Buy TeleVue Nagler 17.0mm Type 4 Eyepiece EN4-17.0TeleVue Nagler 17.0mm Type 4 Eyepiece EN4-17.0 Product Description:
- 2" Barrel
- 82 degree Apparent FOV
- 17mm Eye Relief
- Field Stop of 24.3 mm
- 7 Elements
Product Description
TeleVue Nagler 17.0mm Type 4 Eyepiece EN4-17
Customer Reviews
Most helpful customer reviews
0 of 0 people found the following review helpful.
Awesome! Mid to high mag eyepiece no distortion very wide field of view
By eye in the sky
This eyepiece is in a whole separate category than all my other eyepieces, this being the first Televue eyepiece I now own. The 82 degree apparent field of view at 17mm is really something to behold. Due to it's high enough magnification, wide field of view and very well put together optics without any distortion across the entire field of view. I prefer using this eyepiece for teasing out details on planets than my higher range 1.25" eyepieces (12mm and 9mm). I've used this eyepiece to study the Cassini Division in Saturn's rings. It is also low enough in power and wide enough in FOV to look at some of the faint fuzzies as well. I first used this eyepiece to look at the full moon through my 150mm iOptron Mak which is an F12, which meant I was looking a full moon at 105.88 power or 106X, the entire moon fit within the viewing field and I had a decent amount of room to spare! My other conventional/normal eyepieces can fit the full moon until about 90X with no room to spare as a comparison. This eyepiece really performs at a whole other level. Then I pointed my telescope at Jupiter and the viewing was so ridiculously good that I almost broke out in laughter. Not only could I see a bunch of detail on a Jupiter at that level of magnification, but I could also see all four gallean moons and other background stars around the Jupiter system, I think Ganymede was about as far from Jupiter as it gets. It reminded me of footage I had seen on the "Discovery" or "Science" channel about the Voyager Program, it was really something to look at. And yes I had to move my eye around to take in all of pretty objects in the viewing field. These eyepieces are heavier than the other 2" eyepieces I have, I guess it is due to the amount of glass elements used to produce the wide views. But my mount was sturdy enough to handle the additional load, so I'm really very happy with it and will research getting another one of these perhaps a 31mm. If astonomy is a long-term hobby for you then I strongly recommend owning at least one of these Televue eyepieces.
0 of 0 people found the following review helpful.
Superb
By Walter in Hawaii
One of the best eyepieces I have ever had the pleasure of using. Pinpoint stars to the very edge of the field of view, no distortion of any kind that I could detect. Pincushion distortion might be able to be detected in a test bench environment, but I could not detect it during normal viewing sessions. I love this eyepiece.
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