Compare lenses

Sigma 18-300mm f/3.5-6.3 DC Macro OS HSM Contemporary vs Tamron AF 18-200mm f/3.5-6.3 XR Di II LD Aspherical (IF) Macro

The Sigma 18-300mm f/3.5-6.3 DC Macro OS HSM Contemporary and the Tamron AF 18-200mm f/3.5-6.3 XR Di II LD Aspherical (IF) Macro side by side, computed from this guide's catalogue.

Which to pick

Pick the Sigma 18-300mm f/3.5-6.3 DC Macro OS HSM Contemporary if you want optical stabilisation, which helps most on bodies without it and more reach (to 450mm equivalent). On these specs the Tamron AF 18-200mm f/3.5-6.3 XR Di II LD Aspherical (IF) Macro has no clear advantage: choose it if the price, the handling or a lens you own decides it.

Still torn? Ask the guide about the Sigma 18-300mm f/3.5-6.3 DC Macro OS HSM Contemporary and the Tamron AF 18-200mm f/3.5-6.3 XR Di II LD Aspherical (IF) Macro

Specs side by side

Rows that differ are in full colour; the better value is marked where one is better by any measure.
SpecSigma 18-300mm f/3.5-6.3 DC Macro OS HSM ContemporaryTamron AF 18-200mm f/3.5-6.3 XR Di II LD Aspherical (IF) Macro
MakerSigmaTamron
Focal length18-300mm (macro)18-200mm (macro)
Full-frame equivalent27-450mm on APS-C27-300mm on APS-C
Maximum aperturef/3.5-6.3f/3.5-6.3
Made forAPS-CAPS-C
MountsCanon EF, Nikon F, Pentax KCanon EF, Nikon F, Pentax K
Stabilisedyesstabilisedno
Autofocusyesyes
Zoom range16.7×more range11.1×
Cameras it fits51 in this guide51 in this guide

Focal range, in full-frame terms

142435508513520040080027-450mm equiv.Sigma
Sigma 18-300mm f/3.5-6.3 DC Macro OS HSM Contemporary: 18-300mm on APS-C, like 27-450mm.
142435508513520040080027-300mm equiv.Tamron
Tamron AF 18-200mm f/3.5-6.3 XR Di II LD Aspherical (IF) Macro: 18-200mm on APS-C, like 27-300mm.

Aperture

f/3.5
Sigma 18-300mm f/3.5-6.3 DC Macro OS HSM Contemporary: f/3.5 wide open.
f/3.5
Tamron AF 18-200mm f/3.5-6.3 XR Di II LD Aspherical (IF) Macro: f/3.5 wide open.

Each opening drawn to scale against f/1.4: a smaller f-number lets in more light and blurs the background more.

Field of view

Sigma at 18mm · 67°Tamron at 18mm · 67°Tamron at 200mm · 7°Sigma at 300mm · 5°
How wide each sees, at each end, on the sensor it was made for.

Cameras they fit

51 cameras in this guide take both, so either works on the same body.

Sigma 18-300mm f/3.5-6.3 DC Macro OS HSM Contemporary

and 41 more

Tamron AF 18-200mm f/3.5-6.3 XR Di II LD Aspherical (IF) Macro

and 41 more

On their own pages