Is Portra 800 just Portra 400 pushed one stop?

No. Portra 800 is a distinct emulsion rated natively at ISO 800, not pushed 400. It is designed for its speed, so it holds cleaner colour at 800 than 400 pushed to 800 would.

Should I overexpose Portra 400 or 800?

Portra 400 handles one to two stops of overexposure superbly and many shooters rate it at 200. Portra 800 tolerates overexposure too, but you usually shoot it in low light where extra exposure is a luxury you may not have.

Kodak Portra 400 vs Portra 800: Which to Choose

Two Portra films, one family look — but the speed gap changes grain, latitude and how far you can push into low light.

Same family, different jobs

Portra 400 and Portra 800 both belong to Kodak's professional Portra line, a family of colour negative films built around natural, low-saturation skin tones and gentle contrast. They share the same design philosophy: forgiving highlights, fine grain for their speed, and colours that lean warm and restrained rather than punchy. The difference is one stop of box speed, and that single stop reshapes how each film behaves in practice.

Portra 400 is rated at ISO 400 and is widely treated as the most versatile colour negative film available. Portra 800 is rated at ISO 800, giving you a full stop more sensitivity for dim interiors, evening light and faster shutter speeds. Both are C-41 process films and both are sold in 35mm and 120.

Grain and sharpness

Grain is the most visible trade-off between the two. Portra 400 is remarkably fine grained for a 400-speed film, thanks to Kodak's modern emulsion technology, and it holds crisp detail even in medium format enlargements. Portra 800 is grainier and slightly softer, which is the expected cost of the extra sensitivity. In 35mm the difference is clear when you look closely; in 120 the larger negative hides much of Portra 800's grain, which is why many portrait and wedding shooters happily run 800 in medium format.

Colour rendition

Both films render skin tones beautifully and keep saturation modest, so neither screams for attention the way a consumer film can. Portra 400 is often described as the cleaner, more neutral of the pair, while Portra 800 carries a marginally warmer, denser character that many shooters like under tungsten and mixed artificial light. Neither is a dramatic colour film; both are chosen precisely because they stay calm and let the subject lead.

Exposure latitude

Colour negative film in general tolerates overexposure far better than underexposure, and the Portra films are famous for it. Portra 400 has enormous latitude and is commonly overexposed by one or two stops, rating it at ISO 200 or 100, to give richer shadows and even smoother tones. Portra 800 also has generous latitude but less headroom in the shadows because you are usually shooting it in low light where there is little light to spare. As a rule, expose for the shadows with both films and let the highlights fall where they may.

Pushing and low light

Portra 800 is the natural choice when light runs out. It can be pushed to ISO 1600 with a stop of push processing while still holding usable colour, which makes it a strong candidate for concerts, evening streets and unlit receptions. Portra 400 can also be pushed, but at that point you are often better served by simply loading 800. Think of 800 as the film you reach for when a tripod is not an option and the shutter must stay fast.

Scanning, printing and cost

Both films scan cleanly and print well, but their differences carry through to the final image. Portra 400's finer grain gives scanner software an easier time and produces smoother enlargements, while Portra 800 asks a little more of both the scan and the print because of its extra grain. In darkroom colour printing, both hold their character faithfully, and the restrained Portra palette makes them easy to correct toward neutral. On cost, the two films sit close together, with Portra 800 usually a little more expensive per roll, so many photographers reserve it for situations that genuinely need the speed rather than using it as a default. Because both belong to the same professional line, a lab can process and scan them identically, and the results intercut seamlessly within a single project. Both also handle mixed artificial light sources with real composure, giving you plenty of room to correct white balance after the scan even when the ambient light is complicated.

When to pick each

Choose Portra 400 for daylight portraits, general travel, landscapes and any situation with decent light where you want the finest grain and the most flexibility to overexpose.
Choose Portra 800 for interiors, evening and night work, faster action, and any time you need that extra stop without switching to a grainier consumer film.
In 120, Portra 800 becomes far more attractive because the big negative tames its grain, so it works well for indoor events.
On a budget of frames, Portra 400 is the everyday workhorse and Portra 800 is the specialist you keep for hard light.

A practical approach is to carry both: Portra 400 as your default and Portra 800 for the moment the sun drops. Because they share the same colour family, mixing them across a shoot produces a consistent look with no jarring shift between rolls. Both Kodak Portra 400 and Portra 800, along with the cameras to shoot them, are stocked and tested at Boston Camera (波士頓相機).