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Pentax smc DA* 300mm f/4 ED [IF] SDM

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Prime lens

A prime lens by Pentax for APS-C cameras, 300mm f/4. A weather-sealed telephoto prime for wildlife.

MakerPentax
Focal length300mm (prime)
Maximum aperturef/4
Made forAPS-C sensors
MountsPentax K
Stabilisedno
Autofocusyes

What it frames like

1424355085135200400800450mm equiv.300mm on APS-C
Its full-frame-equivalent focal length on the sensor it was made for.
APS-C 450mm · 5°
How wide 300mm sees on each sensor it covers.
f/4
f/4 wide open, to scale against f/1.4.
  • On APS-C (Pentax K): like 450mm on full frame; f/4 gives about the depth of field of f/6 there.
  • On the larger-sensor bodies of Pentax K: it works with the camera in a APS-C crop mode, at fewer megapixels.

Cameras it fits

Questions people ask

See what it frames: its view on the Pentax K-3 Mark III Monochrome at any distance, and its depth of field, drawn to scale.