Compare lenses

Pentax smc DA 18-250mm f/3.5-6.3 ED AL [IF] vs Pentax smc DA 18-270mm f/3.5-6.3 ED SDM

The Pentax smc DA 18-250mm f/3.5-6.3 ED AL [IF] and the Pentax smc DA 18-270mm f/3.5-6.3 ED SDM side by side, computed from this guide's catalogue.

Which to pick

On these specs they are close to even: hold both if you can, and let the price, the handling and the lenses you want decide.

Still torn? Ask the guide about the Pentax smc DA 18-250mm f/3.5-6.3 ED AL [IF] and the Pentax smc DA 18-270mm f/3.5-6.3 ED SDM

Specs side by side

Rows that differ are in full colour; the better value is marked where one is better by any measure.
SpecPentax smc DA 18-250mm f/3.5-6.3 ED AL [IF]Pentax smc DA 18-270mm f/3.5-6.3 ED SDM
MakerPentaxPentax
Focal length18-250mm (zoom)18-270mm (zoom)
Full-frame equivalent27-375mm on APS-C27-405mm on APS-C
Maximum aperturef/3.5-6.3f/3.5-6.3
Made forAPS-CAPS-C
MountsPentax KPentax K
Stabilisednono
Autofocusyesyes
Zoom range13.9×15.0×
Cameras it fits20 in this guide20 in this guide

Focal range, in full-frame terms

142435508513520040080027-375mm equiv.smc DA 18-250mm
Pentax smc DA 18-250mm f/3.5-6.3 ED AL [IF]: 18-250mm on APS-C, like 27-375mm.
142435508513520040080027-405mm equiv.smc DA 18-270mm
Pentax smc DA 18-270mm f/3.5-6.3 ED SDM: 18-270mm on APS-C, like 27-405mm.

Aperture

f/3.5
Pentax smc DA 18-250mm f/3.5-6.3 ED AL [IF]: f/3.5 wide open.
f/3.5
Pentax smc DA 18-270mm f/3.5-6.3 ED SDM: 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

smc DA 18-250mm at 18mm · 67°smc DA 18-270mm at 18mm · 67°smc DA 18-250mm at 250mm · 5°smc DA 18-270mm at 270mm · 5°
How wide each sees, at each end, on the sensor it was made for.

Cameras they fit

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

Pentax smc DA 18-250mm f/3.5-6.3 ED AL [IF]

and 10 more

Pentax smc DA 18-270mm f/3.5-6.3 ED SDM

and 10 more

On their own pages