The Sigma 70-300mm f/4-5.6 APO DG Macro offers special low-dispersion glass for improved image quality.
Sigma produces two 70-300mm lenses and both share an almost identical design. This is the slightly more expensive APO-designated lens, signalled by the thin red line running discretely round the end of the lens barrel.
For the extra money (roughly £55 more than the budget version), the APO lens offers special low-dispersion glass to reduce colour aberration for improved image quality. The lens is finished in matt black and build quality is of a high standard, especially considering the relatively low price.
There’s a macro facility allowing 1:2 ratio macro shots (half life-size) – not the full 1:1 reproduction from dedicated macro lenses, but it’s a useful addition and can facilitate those extra shooting opportunities you might miss. If you’re a Canon or Nikon user, beware that there’s no image stabilisation, however.
Though there’s an in-lens AF motor (for operation with Nikon D40/D40x/D60 cameras), the AF can still be relatively loud as Sigma’s quiet HSM system is not employed to reduce noise. The AF performance is pretty solid, however, with minimal hunting.SpecificationStreet price:
Canon, Nikon, Sony, Pentax, SigmaWebsite: www.sigma-imaging-uk.com