“ Manufacturer: Tele Vue / Type: Eyepiece / Size: 3.7mm „
Al Nagler is at it again with his endless pursuit of perfection in the wide field arena. The new 3.7mm Ethos is out and due to limited supplies I may be one of the first people to have looked through it. First off this is a mighty eyepiece physically and it does weigh quite a lot at just over 500 grams. It can be used in 1.25 inch barrels but also comes with an adapter that easily fits onto the eyepiece to enable it to be used in 2 inch barrels. There is a rubber grip ring that comes in handy when fumbling with freezing cold fingers and a comfortable fold up flexible rubber eyecup (as opposed to the much less comfortable hard plastic eyeshields present on some eyepieces.) Where the Ethos really shifts up a gear over it's rivals is in it's immense 110 degree field of view! By far the widest field eyepiece available, therefore one could be forgiven for assuming it would suffer from the same issues that plague other wide fielders such as image degradation in the outer field. That's where you'd be wrong. It is unlike any eyepiece I have ever used in that it doesn't suffer from any abberations accross any of it's massive field. Objects were so sharp and crisp, full of contrast. The many subtle shades in Jupiter's atmosphere were picked out exceptionally well, I've never hade a view of Jupiter like it. On the moon words cannot do justice to it's performance. Such a gargantuan field of view at such high magnification is something that needs to be experienced to be believed. Craters showed amazing definition and you actually find yourself having to physically move your head around to take in different portions of the view at any time. Amazingly for such a high magnification Televue have got a very comfortable eye relief out of the 3.7mm, around 15mm making it a pleasure to look through and suitable for spectacle wearers. It must be said that at such a low focal length this Ethos will only get used on the steadiest of nights but even the chance to use it a few times a year would be worth it's £500 price tag. For those who have been anticipating the 3.7mm for sometime, it lives up to every bit of the hype. For those who have never looked through an Ethos you will be in for an absolute treat.