A sharper SX-70? Start with the pictures you want to make

MiNT’s SHARPA lens promises sharper photographs from the SX-70 and the company’s SLR670 cameras. In MiNT’s introduction, published on 30 March 2026, WH Pang describes a redesigned optic intended to improve on the original SX-70 lens. For anyone who enjoys making instant photographs with deliberate focus and careful composition, that is a proposition worth examining.

The interesting question is what you want that extra detail to do. Perhaps you want lettering to remain legible, a face to hold more texture, or small objects to survive as distinct shapes in the finished print. Those are useful ambitions. Before choosing an upgrade, though, give it a specific photographic job.

What MiNT is promising

Pang says SHARPA uses precision-ground lenses and seven coating layers, and identifies both the SX-70 and SLR670 as its intended cameras. These are the manufacturer’s specifications and claims. They establish what MiNT has set out to improve; they do not, by themselves, establish how much difference you will see in your photographs.

The follow-up is Pang’s July 9 introduction to three SHARPA photographers, also published by MiNT. The testimonials describe increased detail, improvements during slow-shutter work and little apparent distortion. That is encouraging feedback, but its setting matters: the camera maker has selected and published these accounts.

I would use that article as a route into the photographers’ experiences, while keeping a separate question in mind: what would a comparison under consistent conditions show? A photographer’s satisfaction is valuable evidence of satisfaction. A controlled comparison helps establish which differences belong to the lens.

Sharpness and distortion also deserve separate attention. Resolving small detail and keeping straight lines straight are different optical qualities. If architecture is your subject, you may care about both. If you mostly make portraits, the balance could be different.

Give the lens a job you can recognise

Start with your own prints. Which ones disappointed you, and why? Missed focus, camera movement and subject movement can all soften a photograph. A lens upgrade cannot correct those problems after the shutter has fired. That makes a little diagnosis more useful than deciding that every soft picture needs better glass.

For anyone with access to an original camera and a SHARPA-equipped example, I would suggest a modest comparison. Choose a subject containing both fine detail and an unmistakable point of focus: lettering beside a textured object, for instance. Support the cameras securely, focus carefully and keep the light and film choice as consistent as practical.

Make repeated photographs rather than trusting a single pair. Record which camera made each frame and any exposure settings you control. You are trying to distinguish a repeatable difference from an especially successful exposure.

Then look at the physical prints at the distance from which you normally enjoy them. A close inspection can reveal differences, but the finished object deserves the deciding vote. Would you notice the improvement in a photograph passed across a table? Would it help the subject read more clearly?

If your main interest is portraits, include a willing sitter as well. A test of printed lettering can tell you something about detail; it cannot decide whether you prefer the resulting portrait. Before spending money, ask MiNT which camera configuration or upgrade service applies to your particular camera, and get a dated quote.

Leave room for other kinds of seeing

There is a useful companion read in Analogue Wonderland’s pinhole-selfie feature, introduced by Paul McKay. Photographer Jed Pearson takes at least one self-portrait on each roll through his pinhole camera. McKay describes how the recurring exercise has helped Pearson think about subject matter, composition and the camera’s characteristics.

That is a practical way to approach any unusual camera: give yourself a recurring assignment and learn what its pictures do. An SX-70 lens comparison could become a small project rather than an afternoon spent hunting for defects.

There is another perspective in Hermann Groeneveld’s SilvergrainClassics feature on Susan Burnstine. Burnstine makes photographs on film using cameras and lenses she builds herself. Groeneveld describes selective sharpness and dreamlike rendering as part of her work. Her approach makes the choice of optical character explicit.

SHARPA is interesting because it offers a different possibility for a familiar camera. Whether that possibility matters depends on your subjects and your taste. Choose one photograph you have struggled to make, then look through MiNT’s introduction and photographer accounts with that picture in mind.