K-1ii reading Sigma 150-500mm as APS-C lens?

**klh** · 08-18-2019, 05:13 AM

I have the Sigma DG 150-500 1:5-6.3 APO HSM with OS. I recently sent it in to Sigma to have the mount updated so I could use it with my K-1ii. The camera reads this as an APS-C lens and automatically enters crop mode, but the lens is a full frame lens. I can switch to full frame mode as long as I remember to do it. Is this expected or normal?

**pschlute** · 08-18-2019, 07:23 AM - **1 Like**

Originally posted by klh

I have the Sigma DG 150-500 1:5-6.3 APO HSM with OS. I recently sent it in to Sigma to have the mount updated so I could use it with my K-1ii. The camera reads this as an APS-C lens and automatically enters crop mode, but the lens is a full frame lens. I can switch to full frame mode as long as I remember to do it. Is this expected or normal?

I leave my K1 in FF mode all the time.

**stevebrot** · 08-18-2019, 09:34 AM - **1 Like**

Originally posted by klh

Is this expected or normal?

There is one version of the 150-500 that identifies with an ambiguous id code (8 255) shared with several other Sigma lenses, including some crop-sensor DC models. That might be the explanation. What do tools such as Lightroom identify your lens as?

Steve

**klh** · 08-18-2019, 12:08 PM

Originally posted by stevebrot

There is one version of the 150-500 that identifies with an ambiguous id code (8 255) shared with several other Sigma lenses, including some crop-sensor DC models. That might be the explanation. What do tools such as Lightroom identify your lens as?

Steve

Thanks Steve. I think you nailed it. Lightroom does not report any lens identification (other than focal length and aperture).

08-18-2019, 05:13 AM	#1
klh Site Supporter Join Date: May 2009 Location: West Lafayette, Indiana, USA Posts: 823	K-1ii reading Sigma 150-500mm as APS-C lens? I have the Sigma DG 150-500 1:5-6.3 APO HSM with OS. I recently sent it in to Sigma to have the mount updated so I could use it with my K-1ii. The camera reads this as an APS-C lens and automatically enters crop mode, but the lens is a full frame lens. I can switch to full frame mode as long as I remember to do it. Is this expected or normal?

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08-18-2019, 07:23 AM - 1 Like	#2
pschlute Loyal Site Supporter Join Date: Mar 2007 Location: Surrey, UK Photos: Gallery Posts: 4,621	Originally posted by klh I have the Sigma DG 150-500 1:5-6.3 APO HSM with OS. I recently sent it in to Sigma to have the mount updated so I could use it with my K-1ii. The camera reads this as an APS-C lens and automatically enters crop mode, but the lens is a full frame lens. I can switch to full frame mode as long as I remember to do it. Is this expected or normal? I leave my K1 in FF mode all the time.

08-18-2019, 09:34 AM - 1 Like	#3
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 39,226	Originally posted by klh Is this expected or normal? There is one version of the 150-500 that identifies with an ambiguous id code (8 255) shared with several other Sigma lenses, including some crop-sensor DC models. That might be the explanation. What do tools such as Lightroom identify your lens as? Steve

08-18-2019, 12:08 PM	#4
klh Site Supporter Join Date: May 2009 Location: West Lafayette, Indiana, USA Posts: 823 Original Poster	Originally posted by stevebrot There is one version of the 150-500 that identifies with an ambiguous id code (8 255) shared with several other Sigma lenses, including some crop-sensor DC models. That might be the explanation. What do tools such as Lightroom identify your lens as? Steve Thanks Steve. I think you nailed it. Lightroom does not report any lens identification (other than focal length and aperture).

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