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

18–250 mm · f/3.5 · Pentax KAF2

The Pentax smc Pentax-DA 18-250mm f/3.5-6.3 ED AL [IF] is a 18–250 mm zoom lens with a maximum aperture of f/3.5 for the Pentax KAF2 mount. Here are its field of view on different sensors, hyperfocal distances, Milky Way exposure limits and the cameras it fits.

Focal length
18–250 mm
Max aperture
f/3.5
Mount
Pentax KAF2
Designed for
1.53× crop

Field of view by sensor

SensorDiagonal angle of view35 mm equivalent
APS-C (1.5×)76.3° – 6.5°28–382 mm
Canon APS-C (1.6×)73.8° – 6.2°29–400 mm
Micro Four Thirds62.0° – 5.0°36–500 mm

Hyperfocal distance

Focal lengthf/5.6f/8f/11f/16
18 mm3.0 m2.1 m1.5 m1.1 m
250 mm569 m399 m290 m199 m

Circle of confusion 0.020 mm (sensor size the lens is designed for).

Longest exposure for sharp stars

CameraNPF rule (wide open)500 rule
APS-C (24 MP)13.3 s @ f/3.518.2 s

Cameras that fit (43)

Where to buy

B&H PhotoAmazonKEH (used)MPB (used)

FAQ

What is the Pentax smc Pentax-DA 18-250mm f/3.5-6.3 ED AL [IF] equivalent to on APS-C?
It is designed for a 1.53× sensor, giving a full-frame equivalent of 28–382 mm.
Which cameras is the Pentax smc Pentax-DA 18-250mm f/3.5-6.3 ED AL [IF] compatible with?
It fits Pentax 35mm film: full frame, Pentax *ist DL2, Pentax *ist DL, Pentax *ist DS2, Pentax *ist DS and more (see the full list above).