Is the sigma 150 600mm f 5 6 3 dg os hsm sports long enough for birds?

Yes, for most birds. The Sigma 150-600mm f/5-6.3 DG OS HSM Sports reaches 600mm on full frame, and my wildlife and sport guide says birds want 600mm equivalent and beyond. On an APS-C body it reaches further, framing like 225-900mm on Nikon F or 240-960mm on Canon EF.

Two things to weigh. It's heavy, and the aperture drops to f/6.3 at the long end, so you'll want good light or a higher ISO for small, fast birds. It is weather-sealed, which helps on damp dawn shoots.

Good bodies to pair it with from the catalogue:

• Nikon D850: full frame, with enough resolution to crop in on distant birds.
• Canon EOS 5D Mark IV: full frame, showing the lens at its marked 600mm.
• Nikon D500: APS-C, for extra reach at a lower weight.

Long lenses hold their value, so buying used can save a lot.

Written by Claude from this site's pages.