ND1000 Exposure Calculator Guide

ND1000 — often nicknamed a "Big Stopper" after one popular brand's version — is the single most common strong ND filter in landscape photography, and the one this calculator's preset list defaults to. Here's what makes it specifically useful, with a full conversion table.

Why 10 stops is the sweet spot for daylight long exposure

A typical bright daylight exposure runs somewhere around 1/125s–1/500s at a moderate aperture. Ten stops of ND (a 1,024× light reduction) pushes that into the 5–60+ second range — long enough to smooth moving water, streak clouds, and blur out pedestrians or traffic, while still being a practical, hand-timeable exposure rather than requiring minutes of patience. Weaker filters (3–6 stops) often can't push daylight shutter speeds past a second or two; much stronger filters (15+ stops) push well into multi-minute territory even in bright daylight, which is overkill for most daytime long-exposure work.

Full conversion table for ND1000

Base shutter speed	ND1000 exposure (×1024)
1/500s	2.0 sec
1/250s	4.1 sec
1/125s	8.2 sec
1/60s	17.1 sec
1/30s	34.1 sec
1/15s	68.3 sec (1 min 8 sec)
1/8s	2 min 8 sec
1/4s	4 min 16 sec

Computed directly from this calculator's new_shutter = base × 2¹⁰ formula.

Exposures past 30 seconds need bulb mode

Most cameras' built-in shutter speed dial stops at 30 seconds — anything longer requires switching to bulb mode, where the shutter stays open for as long as you (or a remote release/intervalometer) hold it. This is exactly the scenario the calculator's built-in countdown timer is built for — start it the instant you open the shutter in bulb mode, and it counts down to the precise moment to close it.

Color cast is more noticeable at this strength

ND1000-strength filters are more prone to a visible color cast (commonly a cool blue or magenta tint) than weaker ND filters, since cheaper strong-ND glass or resin doesn't block all wavelengths perfectly evenly at this level of attenuation. Shoot RAW and correct white balance in post, or use a custom white balance set specifically with the filter attached, rather than relying on your camera's auto white balance through a 10-stop filter.

FAQ

Is ND1000 the same as a "Big Stopper"?

"Big Stopper" is one manufacturer's brand name for their 10-stop filter — ND1000 is the generic stop-equivalent name used industry-wide for any 10-stop ND regardless of brand.

Can I meter accurately through an ND1000 attached to the lens?

Usually not reliably — most camera meters struggle through filters this dark. See the metering guide for the standard workaround (meter first, then attach the filter and use this calculator).

Does ND1000 work for star trail photography?

Not typically — ND filters this strong are generally avoided for astrophotography since they block far too much of the already-faint starlight. See the star trail page for why.

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