There’s plenty of mushiness at the centre of the image, rising to extreme mushiness towards the edges. With care, it’s possible to focus the lens but, in practice, it makes little difference. Think ‘premium glass’ and you’re probably thinking pro-grade fluorite optical glass and ultra-low dispersion optical elements. This Diana+ Premium Glass lens doesn’t have that. However, while the other Diana+ lenses on test, not to mention the Holga 60mm (really, don’t mention it again) boast a single plastic optical element, the Diana+ 75mm has three elements, and they’re all made of glass. In the lo-fi world, that’s more than enough to qualify it as a premium lens.
More in keeping with the lo-fi ethos, it shares a cheap-feeling plastic barrel and mount with the other Diana+ lenses in the group, and it requires the same mount adaptor for fitting on Nikon D-SLRs. It also has the same reach-into-the-front focus dial as the Diana+ 55mm, but has an even more ‘precise’ (it really isn’t) focus scale with one metre, two metres, four metres and infinity markings.
The Diana+ 75mm lens’s glassware launches its sharpness and contrast into the lo-fi stratosphere and makes it one of the sharpest lenses in the group, although that’s not saying a great deal. There’s little distortion and not much colour fringing either. Indeed, if you’re after the lo-fi look, this lens will probably be too good for you.