Both OVL7,16s have very comfortable nice sized, sturdy rubber eyequards, a GREAT feature + Sharp field stops.

The 7 and 16 have some pincushion distortion at the edges like the equivalent Naglers..They're sharp but the small eyerelief may be a prob for eyeglass wearers...A little kidneybeaning was noted daytime like my 7 or 9 Naglers, which in fact have more.

The 16 OVL esp is a Gem at the price , only just behind my Razor sharp 16Nag and better optically than a 15 Omni Plossl I used .

The 16 OVL has a BIG field stop~25mm and thus HUGE F.O.V and its VERY ENJOYABLE
to look through, unlike my 16 Nagler which has little eyerelief,the 16 OVL though is not really eyeglass friendly as is the TV16..you won't see all the field so a 17mm Morpheus may be a better choice.

Little scatter is evident in the 7,16 OVLs around bright objects like Rigel, the Moon.

Bright objects viz Moon just outside the field of view can produce some light intrusion into the field but did not affect me splitting Algieba easily.

Both 7,16 OVLs have pretty good contrast on the Moon for a 7 Element designed EP...Uranus looked a Lovely, Crisply defined, BRIGHT blue/green in the 6 inch StellaLyra Classical Cass using the 16; recommended for non tracking mounts.

With the OVL 7mm you'd need to go to a 7Abbe Ortho, 7mm Delite, Pentax 7xw or 6.5 Morpheus to see any performance differences at much greater cost..DITTO the lovely 16mm IMHO and still those differences would need to be pointed out to non discriminating observers.

I'm from California and I would recommend First Light Optics any time for any purchase from them. I figured I wouldn't get my Nirvana for about a Month and I was blown away on how quick it got to United State in California. I will continue to buy from here.
I recommend this very beautiful Gem of an Eyepiece. Your getting a whole lot for your money. This is a sleeper.

Great product.. Nirvana ES 4mm eyepiece.
82 deg. Does exactly what it says on the tin.. Used with stock 28mm 2" eyepiece with Explorer 130PDS...all purchased together..... And AZ5 mount... All in all
A fantastic package.. All arrived together.. In days.. Great service from FLO.. 👍

I have had this eyepiece for around a year now and it performs well in all my telescopes, including a short tube refractor, a Maksutov and an SCT. I particularly like it as a "finder" eyepiece in my small refractor, and as a lunar eyepiece in my SCT. It is a lovely size, giving a wide field of view (for a 1.25" eyepiece) while still being small and light. Another nice thing is it looks right at home alongside my Explore Scientific eyepieces which are very similar in style.