Against what seems to be a tide of popularity of the 'mega' wide (MW) 100 degree eyepieces, I have gone slightly the other way. Some time ago I sold my only MW eyepiece, a 13mm Televue (TV) Ethos and was almost counselled by people urging me to keep it, I'd regret it etc etc. For many the Ethos is the pinnacle of observing experience and I can certainly see why. They are wonderful eyepieces and provide exceptionally sharp, wide views full of contrast and detail. With the funds raised by selling my Ethos, I put some towards a solar scope (a PST mod) and some towards a 16mm Nagler but not the more usual T5, I went for the cheaper option the T2 Nagler. This had (give or take) the same field as the 13mm Ethos but a slightly lower magnification which I found suited me better. It also has a (for me) perfect eye relief of about 10-12mm which allows the whole field to be seen with averted vision when looking centrally. After the success of this eyepiece which replaced the MW Ethos (I have never missed it) I regrouped after buying the PST mod and bought another eyepiece from the same T2 series, this time the 12mm Nagler. This was also pin sharp, maybe some slight distortion in the extreme edge of field (I use it mainly in a 12" f4 scope with paracorr type 1) but with a darker sky background and the two Naglers combined provide more options than a single eyepiece yet covering the same field and magnification between them. I personally prefer the field of the Nagler (and actually also the Panoptic) to the MW field. These two eyepieces are dual barrel eyepieces so will fit both 2" and 1.25" focusers. They are quite weighty though albeit not so much when compared with a MW of the same focal length. I have been happy with these for a while and also with my preference for simple narrower field eyepieces such as plossl and orthos for planetary but recently have tried the 12mm against a 12.5mm BGO and was somewhat surprised that the view was almost identical other than the field. I also found that the view of the moon in the Ethos created weird blotches of colour (pinkish and blue) and there is no sign of this in the T2s. As a result of this I have been considering changing my BGOs for type one Naglers. A 7mm T1 came up for sale recently and I sold my 7mm BGO and 12.5mm BGO to fund its purchase. I am absolutely delighted that I did. It is in almost pristine condition, and on Jupiter the other night (OK a single use) provided wonderful views at 190x give or take in my 12" dob. I could not fault the image in any way. There was a very slightly (spherical?) aberration in the extreme field as the planet went out but it was in view twice as long as with the BGO resulting in less 'nudges'. The view matched the 8mm and 10mm Radians other than in magnification and the fact that seeing at the higher levels was more intermittent. The 7mm T1 is shown in the pics below in comparison with a 25mm plossl and a 8mm Radian. The weight is in between the two. The 7mm ignoring the extended nose is about the same size as a 25mm plossl. Eye relief is comfortable if you don't wear glasses and almost identical to the 12mm and 16mm T2s. I'd certainly recommend this eyepiece and older eyepieces of these types generally to those looking for a more economical way to gain access to wonderfully wide views with great detail and sharpness. I'll certainly be seeking a 9mm T1 in due course!