Noise on Olympus vs Sony cameras for birds in flight

ByDMcA
Noise on Olympus vs Sony cameras for birds in flight

If you would rather head straight to a concise summary, the TL;DR is at the foot of the page — or jump directly to the FAQ.

Most Internet and YouTube pundits look only at the sensor performance when comparing image quality on the Olympus system with other cameras. But it is called a system for a reason. The cameras, lenses, weather sealing, computational photography features, and stabilisation together all make up the Olympus system, and enable it to compete as an equal with every other camera system out there.

TL;DR
  • Olympus sensor has 0.5–1 stop higher read noise than Sony A9, but system-level noise (sensor + lens + IBIS + processing) is within 0.5 stops of Sony at practical BIF ISOs.
  • At matched focal length and aperture, Olympus 100mm f/2 produces similar SNR to Sony 300mm f/4 due to superior lens speed and optical design.
  • Olympus 5-stop IBIS permits lower ISO (e.g., ISO 800 vs Sony ISO 1600) at the same shutter speed, effectively recovering 1 stop of SNR advantage.
  • Real-world keeper rates and portfolio-quality images are equivalent; sensor read-noise specs are a poor predictor of system noise performance for BIF.
  • Noise is a fourth-order priority after focus accuracy, AF reliability, and shooting comfort; choose systems on those factors instead.

Back to the article.

Frequently asked questions

If Olympus has higher read noise, how can system noise be equal to Sony?

Read noise is only one component. Olympus Zuiko Pro lenses transmit ~85% of light with minimal aberrations; Sony glass averages 80%. Olympus’s in-camera edge-enhancement adds perceived sharpness (masking grain). Collectively, these favour Olympus at practical ISOs.

How much does IBIS reduce apparent noise?

5-stop IBIS = ~1.7× lower ISO at the same shutter speed for equivalent motion blur prevention. That’s approximately 0.75 stop SNR improvement in the final image. Combined with matched apertures, EM1x often looks cleaner than Sony despite higher sensor read noise.

Should I compare sensor specs or real-world images?

Always real-world images. Sensor read-noise numbers are measured in lab conditions (clean electricity, thermal stabilization) that never occur in field photography. System-level noise (signal + processing + optics) diverges significantly from spec-sheet comparisons at practical ISOs.

Which camera produces cleaner BIF images?

Equivalent keeper rates and post-processed image quality. Sony A9 at ISO 3200 with 300mm f/4 = EM1x at ISO 1600 with 100mm f/2 in system noise output. After standard denoising (DxO, Topaz), both look identical at 24-inch print size.

Can I trust YouTube reviews comparing noise?

No. Most compare at single-matched ISO without accounting for matched apertures, lenses, or IBIS. A fair test requires: same subject magnification + aperture + ISO, same shooting technique, same denoising. This is rarely done, leading to biased conclusions.

Back to the article.

Similar Posts

  • Best lenses for the new OM-3 camera

    ByDMcA

    The OM-3’s small, elegant body pairs best with compact lenses, and no camera system has a better collection of lightweight options than Micro Four Thirds, with over 100 lenses from seven optical companies accumulated over 17 years. A six-lens kit covering every genre from astro to wildlife — the Leica 9mm, Olympus 17mm, Olympus 9-18mm, Olympus 60mm macro, Panasonic 14-140mm, and Panasonic 100-300mm — weighs just 1,287g total, roughly 300g less than the Sony 200-600mm zoom alone.

  • Sony a6400 for birds in flight

    ByDMcA

    Over 3,441 shots across seven sessions at Andover and Richmond Park, the Sony a6400 averaged 35% focus accuracy for birds in flight despite trying every published autofocus setup recommendation. The ergonomics made a difficult situation worse: a tiny viewfinder aperture that requires near-squinting to use, a stiff rear control dial, intrusive exposure zebras that obscure the subject, and no proper battery grip available from Sony or third parties.

  • Sony Zooms vs the 600mm f4 Prime—comparative image quality

    ByDMcA

    Using standardised test data from The-Digital-Picture — the only widely available source with controlled lab comparisons of both the 600mm f4 GMaster and the wildlife zooms — the £12,000 prime shows minimal perceptible image quality advantage over the £1,600 200-600mm or the £2,400 400-800mm at 600mm. Independent numerical resolution data comparing exotic primes to wildlife zooms essentially does not exist, because manufacturers provide early samples to YouTube influencers rather than to test houses that might measure the difference.

  • Sony A9 focus accuracy – birds in flight hit rate

    ByDMcA

    Detailed analysis using AFV.exe to check the focus point location for 1,600 A9 shots showed that even when the camera placed a focus point directly on the bird, the resulting image was out of focus 40% of the time — camera error, not user error. The afternoon session hit rate of 39% reflects a genuine limitation in demanding conditions, not the test methodology.

  • Depth of field for birds in flight – good or bad?

    ByDMcA

    Micro Four Thirds gives 4x the depth of field of a full-frame camera at equivalent subject magnification and aperture — which is an advantage for birds in flight because a wider depth of field is more tolerant of the small autofocus errors that are inevitable when tracking a rapidly moving subject. Full-frame’s shallower depth of field amplifies those same autofocus errors, producing more shots where the camera is close to focus but not critically sharp.