§ 01 Other use cases

Best Astrophotography Lenses for Pentax K

Astrophotography lenses for Pentax K covers 8 lenses in the Lens Arena database, spanning 16–35 mm. List and launch prices run from about $199 to $899. Releases span 2012 to 2022.

Our picks

From manufacturer specs

Pick	Lens	Key figure	Why
Brightest	Sigma A 35 mm f/1.4 DG HSM	f/1.4	Brightest maximum aperture here at f/1.4, and the lightest of the f/1.4 lenses at 665 g.
Lightest	Pentax HD FA 35 mm f/2	193 g	Lightest here at 193 g, 37 g less than the next lightest (Mitakon 20 mm f/2.0 4.5x Super Macro).
Best for APS-C bodies	Samyang 16mm F2 ED AS UMC CS	f/2.0	Brightest lens here designed for APS-C, at f/2.0, about 24 mm full-frame equivalent.
Best third-party	Irix 21 mm f/1.4	f/1.4	Next brightest third-party lens (Irix) at f/1.4, after Sigma A 35 mm f/1.4 DG HSM (picked above).
Newest	Irix 30 mm f/1.4	Sep 2021	Released Sep 2021, the most recent after Irix 21 mm f/1.4 (picked above).

Sample frames from the top lenses

One frame per lens

Photo taken with the Sigma A 35 mm f/1.4 DG HSM by anna rostova – DSC_7788 — Sigma A 35 mm f/1.4 DG HSM by anna rostova

Photo taken with the Pentax HD FA 35 mm f/2 by alain.rappeneau – _IR03951_IR_780_diptyque — Pentax HD FA 35 mm f/2 by alain.rappeneau

Photo taken with the Samyang 16mm F2 ED AS UMC CS by oldTor – Fireplace matches. Wide Angle Close Up. UVIVF — Samyang 16mm F2 ED AS UMC CS by oldTor

Photo taken with the Pentax HD FA 31 mm f/1.8 Limited by noveli77 – Glastonbury Tor hillside. — Pentax HD FA 31 mm f/1.8 Limited by noveli77

How we chose

Lenses of 35 mm or wider (full-frame equivalent) at f/2 or brighter. Picks come from manufacturer specifications: the brightest maximum aperture, the lowest weight, APS-C and third-party options, and the most recent release. We do not rank on sharpness, bokeh or autofocus, because we have no test data for them. Use the sample frames and video reviews on each lens page to judge those.

All 8 astrophotography lenses for Pentax K

Mitakon

20 mm f/2.0 4.5x Super Macro

Aperture: f/2
Focal: 20mm
Mount: Canon EF · Nikon F · Sony A · Pentax K · Micro Four Thirds · Sony E · Fujifilm X
Released: Dec 2016

$199launch

Irix

21 mm f/1.4

Aperture: f/1.4
Focal: 21mm
Mount: Canon EF · Nikon F · Pentax K
Released: Mar 2022

prime

Samyang

16mm F2 ED AS UMC CS

Aperture: f/2
Focal: 16mm
Mount: Canon EF-M · Canon EF-S · Four Thirds · Fujifilm X · Micro Four Thirds · Nikon F · Pentax K · Samsung NX · Sony A · Sony E
Released: Oct 2013