SLR lens mount

Pentax K mount

Everything about the Pentax K: flange focal distance, native lenses, cameras and which adapters keep infinity focus.

45.46 mm
Flange focal distance
44.0 mm
Throat diameter
1975
Introduced
SLR
System type
170
Lenses in our database

Mount facts#

Mount
Pentax K
Maker
Pentax
Type
SLR
Flange focal distance
45.46 mm
Formats
Full frame & APS-C
Electronic contacts / AF
Yes
Production
1975–

About the Pentax K#

Pentax's bayonet since 1975; still used by K-1 and K-3 bodies, and backward compatible with nearly every K lens ever made.

Pentax K lenses#

170 native lenses, widest to longest.

LensFocalApertureFormatType
Sigma 4.5mm f/2.8 EX DC HSM circular fisheye4.5 mmf/2.8APS-CFisheye
Samyang 8mm f/3.5 Fish-Eye CS8 mmf/3.5Full frameUltra-wide prime
Sigma 8-16mm f/4.5-5.6 DC HSM8–16 mmf/4.5–5.6APS-CWide-angle zoom
Samyang 10mm f/2.8 ED AS NCS CS10 mmf/2.8Full frameUltra-wide prime
Sigma 10mm f/2.8 EX DC Fisheye HSM10 mmf/2.8APS-CFisheye
Pentax smc Pentax-DA Fish-Eye 10-17mm f/3.5-4.5 ED IF10–17 mmf/3.5–4.5APS-CWide-angle zoom
Sigma 10-20mm f/3.5 EX DC HSM10–20 mmf/3.5APS-CWide-angle zoom
Sigma 10-20mm f/4-5.6 EX DC10–20 mmf/4–5.6APS-CWide-angle zoom
Tamron SP AF 10-24mm f/3.5-4.5 Di II LD Aspherical (IF)10–24 mmf/3.5–4.5APS-CWide-angle zoom
Pentax HD Pentax-DA* 11-18mm f/2.8 ED DC AW11–18 mmf/2.8APS-CWide-angle zoom
Tamron SP AF 11-18mm f/4.5-5.6 Di-II LD Aspherical (IF)11–18 mmf/4.5–5.6APS-CWide-angle zoom
Laowa 12mm f/2.8 Zero-D12 mmf/2.8Full frameUltra-wide prime
Pentax smc Pentax-DA 12-24mm f/4 ED AL IF12–24 mmf/4APS-CWide-angle zoom
Sigma 12-24mm F4.5-5.6 II DG HSM12–24 mmf/4.5–5.6Full frameWide-angle zoom
Sigma 12-24mm f/4.5-5.6 EX DG Aspherical HSM12–24 mmf/4.5–5.6Full frameWide-angle zoom
Samyang 14mm f/2.8 AE ED AS IF UMC14 mmf/2.8Full frameUltra-wide prime
Pentax smc PENTAX-DA 14mm F2.8 ED[IF]14 mmf/2.8APS-CWide-angle prime
Sigma 14mm f/2.8 EX14 mmf/2.8Full frameUltra-wide prime
Sigma 14mm f/2.8 EX Aspherical HSM14 mmf/2.8Full frameUltra-wide prime
Sigma 14mm f/3.5 EX14 mmf/3.5Full frameUltra-wide prime
Laowa 15mm F/4 Wide Angle Macro15 mmf/4Full frameMacro
Pentax smc Pentax-DA 15mm f/4 ED AL Limited15 mmf/4APS-CWide-angle prime
Sigma 15mm f/2.8 EX DG Diagonal Fisheye15 mmf/2.8Full frameFisheye
Pentax HD Pentax-D FA 15-30mm f/2.8 ED SDM WR15–30 mmf/2.8Full frameWide-angle zoom
Sigma 15-30mm f/3.5-4.5 EX DG Aspherical15–30 mmf/3.5–4.5Full frameWide-angle zoom
Samyang 16mm f/2.0 ED AS UMC CS16 mmf/2Full frameUltra-wide prime
Pentax smc Pentax-DA 16-45mm f/4 ED AL16–45 mmf/4APS-CStandard zoom
Pentax HD Pentax DA* 16-50mm f/2.8 ED PLM AW16–50 mmf/2.8APS-CStandard zoom
Pentax smc Pentax-DA* 16-50mm f/2.8 ED AL IF SDM16–50 mmf/2.8APS-CStandard zoom
Pentax HD Pentax-DA 16-85mm f/3.5-5.6 ED DC WR16–85 mmf/3.5–5.6APS-CStandard zoom
Sigma 17-35mm F2.8-4 EX DG Aspherical HSM17–35 mmf/2.8–4Full frameWide-angle zoom
Sigma 17-35mm f/2.8-4 EX DG17–35 mmf/2.8–4Full frameWide-angle zoom
Tamron SP AF 17-35mm f/2.8-4 Di LD Aspherical (IF)17–35 mmf/2.8–4Full frameWide-angle zoom
Sigma 17-50mm f/2.8 EX DC HSM17–50 mmf/2.8APS-CStandard zoom
Sigma 17-50mm f/2.8 EX DC OS HSM17–50 mmf/2.8APS-CStandard zoom
Tamron AF 17-50mm f/2.8 XR Di-II LD (Model A16)17–50 mmf/2.8APS-CStandard zoom
Tamron SP AF 17-50mm f/2.8 XR Di II LD Aspherical (IF)17–50 mmf/2.8APS-CStandard zoom
Pentax smc Pentax-DA 17-70mm f/4 AL [IF] SDM17–70 mmf/4APS-CStandard zoom
Sigma 17-70mm f/2.8-4 DC Macro OS HSM | Contemporary 01317–70 mmf/2.8–4APS-CMacro
Sigma 17-70mm f/2.8-4.5 DC Macro17–70 mmf/2.8–4.5APS-CMacro
Sigma 18-35mm f/1.8 DC HSM [A]18–35 mmf/1.8APS-CStandard zoom
Pentax HD Pentax-DA 18-50mm f/4-5.6 DC WR RE18–50 mmf/4–5.6APS-CStandard zoom
Pentax smc Pentax-DA L 18-50mm f/4-5.6 DC WR RE18–50 mmf/4–5.6APS-CStandard zoom
Sigma 18-50mm f/2.8 EX DC18–50 mmf/2.8APS-CStandard zoom
Sigma 18-50mm f/3.5-5.6 DC18–50 mmf/3.5–5.6APS-CStandard zoom
Pentax smc Pentax-DA 18-55mm f/3.5-5.6 AL18–55 mmf/3.5–5.6APS-CStandard zoom
Pentax smc Pentax-DA 18-55mm f/3.5-5.6 AL II/L/WR18–55 mmf/3.5–5.6APS-CStandard zoom
Sigma 18-125mm f/3.5-5.6 DC18–125 mmf/3.5–5.6APS-CStandard zoom
Pentax smc Pentax-DA 18-135mm f/3.5-5.6 ED AL IF DC WR18–135 mmf/3.5–5.6APS-CSuperzoom
Sigma 18-200mm f/3.5-6.3 DC18–200 mmf/3.5–6.3APS-CSuperzoom
Sigma 18-200mm f/3.5-6.3 DC Macro OS HSM18–200 mmf/3.5–6.3APS-CMacro
Sigma 18-200mm f/3.5-6.3 II DC OS HSM18–200 mmf/3.5–6.3APS-CSuperzoom
Tamron AF 18-200mm f/3.5-6.3 XR Di II LD Aspherical (IF) Macro18–200 mmf/3.5–6.3APS-CMacro
Pentax smc Pentax-DA 18-250mm f/3.5-6.3 ED AL [IF]18–250 mmf/3.5–6.3APS-CSuperzoom
Sigma 18-250mm f/3.5-6.3 DC OS Macro HSM18–250 mmf/3.5–6.3APS-CMacro
Tamron AF 18-250mm f/3.5-6.3 Di II LD Aspherical (IF) Macro18–250 mmf/3.5–6.3APS-CMacro
Sigma 18-300mm f/3.5-6.3 DC Macro HSM18–300 mmf/3.5–6.3APS-CMacro
Tamron AF 19-35mm f/3.5-4.519–35 mmf/3.5–4.5Full frameWide-angle zoom
Samyang 20mm f/1.8 ED AS UMC20 mmf/1.8Full frameUltra-wide prime
Sigma 20mm f/1.8 EX DG20 mmf/1.8Full frameUltra-wide prime
Voigtländer Color Skopar 20mm F3.5 SLII Aspherical20 mmf/3.5Full frameUltra-wide prime
Tokina 20-35mm f/3.5-4.5 AF-235 II20–35 mmf/3.5–4.5Full frameWide-angle zoom
Pentax HD Pentax-DA 20-40mm f/2.8-4 ED Limited DC WR20–40 mmf/2.8–4APS-CStandard zoom
Pentax HD Pentax-DA 21mm f/3.2 ED AL Limited21 mmf/3.2APS-CWide-angle prime
Pentax smc Pentax-DA 21mm f/3.2 AL Limited21 mmf/3.2APS-CWide-angle prime
Samyang 24mm f/1.4 ED AS IF UMC24 mmf/1.4Full frameWide-angle prime
Samyang T-S 24mm f/3.5 ED AS UMC24 mmf/3.5Full frameWide-angle prime
Sigma 24mm f/2.8 Super Wide II24 mmf/2.8Full frameWide-angle prime
Sigma 24-60mm f/2.8 EX DG24–60 mmf/2.8Full frameStandard zoom
Pentax HD Pentax-D FA 24-70mm f/2.8 ED SDM WR24–70 mmf/2.8Full frameStandard zoom
Sigma 24-70mm f/2.8 EX DG Macro24–70 mmf/2.8Full frameMacro
Sigma 24-70mm f/2.8 IF EX DG HSM24–70 mmf/2.8Full frameStandard zoom
Tamron SP AF 24-135mm f/3.5-5.6 AD Aspherical (IF) Macro24–135 mmf/3.5–5.6Full frameMacro
Zeiss Distagon T* 25mm f/2.8 ZF.225 mmf/2.8Full frameWide-angle prime
Pentax smc Pentax-A 28mm 1:2.828 mmf/2.8Full frameWide-angle prime
Pentax smc Pentax-F 28mm f/2.828 mmf/2.8Full frameWide-angle prime
Pentax smc Pentax-FA 28mm f/2.8 AL28 mmf/2.8Full frameWide-angle prime
Pentax smc Pentax-M 28mm 1:3.528 mmf/3.5Full frameWide-angle prime
Pentax smc Pentax-M 28mm f/2.828 mmf/2.8Full frameWide-angle prime
Sigma 28mm f/1.8 EX DG28 mmf/1.8Full frameWide-angle prime
Pentax smc Pentax-FA 28-70mm f/4 AL28–70 mmf/4Full frameStandard zoom
Sigma 28-70mm f/2.8 EX DG28–70 mmf/2.8Full frameStandard zoom
Tokina 28-70mm f/2.8 AT-X Pro SV28–70 mmf/2.8Full frameStandard zoom
Tamron SP AF 28-75mm f/2.8 XR Di LD Aspherical (IF) Macro28–75 mmf/2.8Full frameMacro
Pentax F 28-80mm f/3.5-4.528–80 mmf/3.5–4.5Full frameStandard zoom
Tokina AF 28-80mm f/2.8 AT-X 280 Pro28–80 mmf/2.8Full frameStandard zoom
Pentax HD Pentax-D FA 28-105mm f/3.5-5.6 ED DC WR28–105 mmf/3.5–5.6APS-CStandard zoom
Tamron SP AF 28-105mm f/2.8 LD Aspherical IF28–105 mmf/2.8Full frameStandard zoom
Sigma 28-300mm f/3.5-6.3 Macro ASP IF28–300 mmf/3.5–6.3Full frameMacro
Tamron AF 28-300mm f/3.5-6.3 XR Di LD Aspherical (IF)28–300 mmf/3.5–6.3Full frameSuperzoom
Pentax smc Pentax K 30mm f/2.830 mmf/2.8Full frameWide-angle prime
Sigma 30mm F1.4 DC HSM | Art 01330 mmf/1.4APS-CStandard prime
Sigma 30mm f/1.4 EX DC HSM30 mmf/1.4APS-CStandard prime
Pentax smc Pentax-FA 31mm f/1.8 AL Limited31 mmf/1.8Full frameWide-angle prime
Pentax smc Pentax-DA 35mm f/2.4 AL35 mmf/2.4APS-CStandard prime
Pentax smc Pentax-DA 35mm f/2.8 Macro Limited35 mmf/2.8APS-CMacro
Pentax smc Pentax-M 35mm 1:235 mmf/2Full frameStandard prime
Sigma 35mm f/1.4 DG HSM | A35 mmf/1.4Full frameStandard prime
Zeiss Carl Zeiss Distagon T* 2/35 ZF.235 mmf/2Full frameStandard prime
Pentax smc Pentax-F ZOOM 35-70mm f/3.5-4.535–70 mmf/3.5–4.5Full frameStandard zoom
Tamron 35-70mm f/3.5 CF Macro35–70 mmf/3.5Full frameMacro
Pentax smc Pentax-F 35-80mm f/4-5.635–80 mmf/4–5.6Full frameStandard zoom
Pentax smc Pentax-DA 40mm f/2.8 Limited40 mmf/2.8APS-CStandard prime
Pentax smc Pentax-DA 40mm f/2.8 XS40 mmf/2.8APS-CStandard prime
Pentax smc Pentax-FA 43mm f/1.9 Limited43 mmf/1.9Full frameStandard prime
Pentax smc Pentax-A 50mm f/1.450 mmf/1.4Full frameStandard prime
Pentax smc Pentax-A 50mm f/1.750 mmf/1.7Full frameStandard prime
Pentax smc Pentax-DA 50mm f/1.850 mmf/1.8APS-CPortrait / short tele prime
Pentax smc Pentax-FA 50mm f/1.450 mmf/1.4Full frameStandard prime
Pentax smc Pentax-FA 50mm f/1.750 mmf/1.7Full frameStandard prime
Pentax smc Pentax-M 50mm f/1.450 mmf/1.4Full frameStandard prime
Pentax smc Pentax-M 50mm f/1.750 mmf/1.7Full frameStandard prime
Pentax smc Pentax-M 50mm f/250 mmf/2Full frameStandard prime
Pentax smc Pentax-M Macro 1:4 50mm50 mmf/4Full frameMacro
Sigma 50mm f/1.4 EX DG HSM50 mmf/1.4Full frameStandard prime
Pentax smc Pentax-DA* 50-135mm f/2.8 ED IF SDM50–135 mmf/2.8APS-CTelephoto zoom
Sigma 50-150mm f/2.8 APO EX DC HSM II50–150 mmf/2.8APS-CTelephoto zoom
Sigma 50-150mm f/2.8 APO EX DC OS HSM50–150 mmf/2.8APS-CTelephoto zoom
Pentax smc Pentax-DA 50-200mm f/4-5.6 DA ED50–200 mmf/4–5.6APS-CTelephoto zoom
Pentax smc Pentax-DA L 50-200mm f/4-5.6 ED WR50–200 mmf/4–5.6APS-CTelephoto zoom
Sigma 50-500mm f/4-6.3 EX DG HSM50–500 mmf/4–6.3Full frameSuperzoom
Sigma 50-500mm f/4.5-6.3 APO DG OS HSM50–500 mmf/4.5–6.3Full frameSuperzoom
Pentax smc Pentax-DA* 55mm f/1.4 SDM55 mmf/1.4APS-CPortrait / short tele prime
Sigma 55-200mm f/4-5.6 DC55–200 mmf/4–5.6APS-CTelephoto zoom
Pentax HD Pentax-DA 55-300mm f/4-5.8 ED WR55–300 mmf/4–5.8APS-CTelephoto zoom
Pentax HD Pentax-DA 55-300mm f/4.5-6.3 ED PLM WR RE55–300 mmf/4.5–6.3APS-CTelephoto zoom
Pentax smc Pentax-DA 55-300mm f/4-5.8 ED55–300 mmf/4–5.8APS-CTelephoto zoom
Pentax smc Pentax-DA L 55-300mm f/4-5.8 ED55–300 mmf/4–5.8APS-CTelephoto zoom
Voigtländer Nokton 58mm F1.4 SLII58 mmf/1.4Full frameStandard prime
Laowa 60mm f/2.8 2X Ultra-Macro60 mmf/2.8Full frameMacro
Pentax smc Pentax DA* 60-250mm f/4 IF SDM60–250 mmf/4APS-CTelephoto zoom
Pentax HD Pentax-DA 70mm f/2.4 Limited70 mmf/2.4APS-CPortrait / short tele prime
Pentax smc Pentax-DA 70mm f/2.4 Limited70 mmf/2.4APS-CPortrait / short tele prime
Sigma 70mm f/2.8 EX DG Macro70 mmf/2.8Full frameMacro
Pentax HD Pentax-D FA* 70-200mm f/2.8 ED DC AW70–200 mmf/2.8APS-CTelephoto zoom
Sigma 70-200mm f/2.8 EX DG HSM70–200 mmf/2.8Full frameTelephoto zoom
Sigma 70-200mm f/2.8 EX DG Macro HSM II70–200 mmf/2.8Four ThirdsMacro
Sigma 70-200mm f/2.8 EX DG OS HSM70–200 mmf/2.8Full frameTelephoto zoom
Tamron SP AF 70-200mm f/2.8 Di LD (IF) Macro70–200 mmf/2.8Full frameMacro
Sigma 70-300mm f/4-5.6 APO Macro Super II70–300 mmf/4–5.6Full frameMacro
Sigma 70-300mm f/4-5.6 DG Macro70–300 mmf/4–5.6Full frameMacro
Sigma 70-300mm f/4-5.6 DG OS70–300 mmf/4–5.6Full frameTelephoto zoom
Sigma 70-300mm f/4-5.6 DL Macro70–300 mmf/4–5.6Full frameMacro
Tamron AF 70-300mm f/4-5.6 Di LD Tele-Macro (1:2)70–300 mmf/4–5.6Full frameMacro
Tamron AF 70-300mm f/4-5.6 LD Macro 1:270–300 mmf/4–5.6Full frameMacro
Pentax smc Pentax-M 75-150mm f/475–150 mmf/4Full frameTelephoto zoom
Pentax smc Pentax-FA 77mm f/1.8 Limited77 mmf/1.8Full framePortrait / short tele prime
Pentax smc Pentax-M 80-200mm f/4.580–200 mmf/4.5Full frameTelephoto zoom
Tokina 80-200mm f/4.5-5.6 SZ-X80–200 mmf/4.5–5.6Full frameTelephoto zoom
Tokina AF 80-200mm f/2.8 AT-X 828 Pro80–200 mmf/2.8Full frameTelephoto zoom
Tamron AF 80-210mm f/4.5-5.6 280D80–210 mmf/4.5–5.6Full frameTelephoto zoom
Tokina AT-X AF SD 80-400mm f/4.5-5.680–400 mmf/4.5–5.6Full frameTelephoto zoom
Samyang 85mm f/1.4 IF UMC Aspherical85 mmf/1.4Full framePortrait / short tele prime
Sigma 85mm f/1.4 EX DG HSM85 mmf/1.4Full framePortrait / short tele prime
Sigma 90mm f/2.8 Macro AF90 mmf/2.8Full frameMacro
Tamron SP AF 90mm f/2.8 Di Macro 172E90 mmf/2.8Full frameMacro
Tamron SP AF 90mm f/2.8 Di Macro 1:190 mmf/2.8Full frameMacro
Pentax smc Pentax-D FA Macro 100mm f/2.8 WR100 mmf/2.8Full frameMacro
Pentax smc Pentax-M Macro 1:4 100mm100 mmf/4Full frameMacro
Sigma 100-300mm f/4 APO EX DG HSM100–300 mmf/4Full frameTelephoto zoom
Sigma 100-300mm f/4 APO EX DG HSM + Kenko Teleplus PRO 300 AF 1.4× DGX ext.100–300 mmf/4Full frameTelephoto zoom
Samyang 135mm f/2 ED UMC135 mmf/2Full framePortrait / short tele prime
Pentax Takumar 135mm f/2.5 Bayonet135 mmf/2.5Full framePortrait / short tele prime
Pentax smc Pentax-M 135mm f/3.5135 mmf/3.5Full framePortrait / short tele prime
Pentax smc Pentax-M 150mm f/3.5150 mmf/3.5Full frameTelephoto prime
Pentax HD Pentax-D FA 150-450mm f/4.5-5.6 ED DC AW150–450 mmf/4.5–5.6APS-CTelephoto zoom
Sigma 150-500mm f/5-6.3 APO DG OS HSM150–500 mmf/5–6.3Full frameTelephoto zoom
Sigma 180mm f/5.6 APO Macro180 mmf/5.6Full frameMacro
Pentax smc Pentax-M 200mm f/4200 mmf/4Full frameTelephoto prime
Tokina 500mm f/8 RMC Mirror Lens500 mmf/8Full frameSuper-telephoto prime

Use Pentax K lenses on other cameras#

AdapterPossible?Flange gap
Pentax K → Sony E-mountYes · manual+27.46 mm
Pentax K → Canon RFYes · manual+25.46 mm
Pentax K → Nikon ZYes · manual+29.46 mm
Pentax K → Fujifilm X-mountYes · manual+27.76 mm
Pentax K → Micro Four ThirdsYes · manual+26.21 mm
Pentax K → L-MountYes · manual+25.46 mm
Pentax K → Canon EF-MYes · manual+27.46 mm
Pentax K → Fujifilm G-mountYes · manual+18.76 mm
Pentax K → Hasselblad XCDYes · manual+27.32 mm
Pentax K → Nikon 1 (CX)Yes · manual+28.46 mm
Pentax K → Pentax QYes · manual+36.26 mm
Pentax K → Samsung NXYes · manual+19.96 mm
Pentax K → Canon EFYes · manual+1.46 mm
Pentax K → Nikon FNo infinity focus-1.04 mm

Adapt other lenses to Pentax K bodies#

AdapterPossible?Flange gap
Nikon F → Pentax KYes · manual+1.04 mm
T-mount (T2) → Pentax KYes · manual+9.54 mm
Tamron Adaptall → Pentax KYes · manual+5.24 mm
Canon EF → Pentax KNo infinity focus-1.46 mm
Canon EF-S → Pentax KNo infinity focus-1.46 mm
Sony / Minolta A-mount → Pentax KNo infinity focus-0.96 mm
M42 screw mount → Pentax KNo infinity focus+0.00 mm
Leica M → Pentax KNo infinity focus-17.66 mm
Leica R → Pentax KYes · manual+1.54 mm
Canon FD → Pentax KNo infinity focus-3.46 mm

Adapting basics#

A lens can be adapted with simple tube spacers when its flange distance is longer than the camera's. With 45.46 mm, Pentax K lenses can in principle go on bodies with shorter flanges such as Praktica B, Canon EF, Canon EF-S, Sigma SA, M39x1, Kiev Automat. Bodies with this mount can take lenses from longer-flange systems such as Nikon F, Leica R, KMZ Zenit DKL-mount, Contax N, Tamron Adaptall, Arri PL, Leica S, T-mount (T2).

Sources & licences#

Last updated October 03, 2026 · How we calculate · Sources