More detail, less dreaminess -- still the authentic Diana feel.
As an almost exclusive Diana user, I was very excited about the glass lens. After a few rolls of films, I can say it’s definitely a worthy addition to any Diana lover’s collection.
Everybody who owns one of this plastic beauties know what to expect about a basic lens: more or less sharp at the center, fuzzy at the edges, vignetting and not too much details but tons of dreaminess. If you ever feel the need to trade some of the striking atmosphere to some detail, then the Diana F+ Premium Glass Lens is for you.
The glass lens produces sharper and more detailed images. It still has the vignetting effect, though. It also has a definite chromatic aberration (it tends to give objects a thin colored line on the edges) which in case of a Diana shot, is not disturbing but can add to the lo-fi quality.
Focusing is a bit more tricky compared to the plastic lens. The distant scale on the lens is more detailed than with the plastic lens and you indeed better pay more attention when you compose your shots. Because it is more detailed, the lens is much less forgiving on shorter distances — small differences in the focal plane which were once mercifully smeared by the plastic lens are becoming much more apparent.
The lens is very sturdy and reliable, focusing is easy and smooth and the focusing ring is still very stable.
One piece of (subjective) advice: if you decide to shoot a roll with the glass lens, set your other lenses aside. The plastic accessory lens was built to support the original Diana feel — this is something very new. Unless you don’t mind having pictures with strikingly different effects, it’s better to make a clear choice between glass and plastic. Hopefully, Lomography will also provide some additional glass lenses in the future.