https://community.usa.canon.com/t5/EF-RF-Lenses/EF-S-17-85mm-f-4-5-6-IS-USM-Lens-Causing-Problems/m-p/392498#M24227 <P>Well, some questions might help us to help you.</P><P>Is this lens new to you?<BR />If not, did it work before?&nbsp; &nbsp;If it has stopped working has it had any knocks, bangs or other physical contact?<BR />What cameras are you using the lens on?</P><P>All things being equal, if it was working before and you are using it on an APS-C DSLR, then my first reaction is that the aperture blades have stuck.&nbsp; Normally, with a DSLR, you look through the viewfinder and you see the image with the aperture fully open, it only closes the aperture to your selected setting to shoot or if you choose exposure preview.</P><P>Given the age of the lens, if that is the case, it is extremely unlikely that it will be serviceable - it's way out of service life.&nbsp; That lens was replaced in 2004 by the rather better 15-85, so you might pick up one of those.</P> Thu, 03 Nov 2022 20:11:28 GMT Tronhard 2022-11-03T20:11:28Z https://community.usa.canon.com/t5/EF-RF-Lenses/EF-S-17-85mm-f-4-5-6-IS-USM-Lens-Causing-Problems/m-p/392491#M24226 <P>No matter what camera body I attach my 17-85mm lens to, the view through the eye piece is heavily dimmed and the camera cannot take a picture. Any ideas as to what is going on?&nbsp;</P> Thu, 03 Nov 2022 19:26:09 GMT https://community.usa.canon.com/t5/EF-RF-Lenses/EF-S-17-85mm-f-4-5-6-IS-USM-Lens-Causing-Problems/m-p/392491#M24226 ruralvibe 2022-11-03T19:26:09Z https://community.usa.canon.com/t5/EF-RF-Lenses/EF-S-17-85mm-f-4-5-6-IS-USM-Lens-Causing-Problems/m-p/392498#M24227 <P>Well, some questions might help us to help you.</P><P>Is this lens new to you?<BR />If not, did it work before?&nbsp; &nbsp;If it has stopped working has it had any knocks, bangs or other physical contact?<BR />What cameras are you using the lens on?</P><P>All things being equal, if it was working before and you are using it on an APS-C DSLR, then my first reaction is that the aperture blades have stuck.&nbsp; Normally, with a DSLR, you look through the viewfinder and you see the image with the aperture fully open, it only closes the aperture to your selected setting to shoot or if you choose exposure preview.</P><P>Given the age of the lens, if that is the case, it is extremely unlikely that it will be serviceable - it's way out of service life.&nbsp; That lens was replaced in 2004 by the rather better 15-85, so you might pick up one of those.</P> Thu, 03 Nov 2022 20:11:28 GMT https://community.usa.canon.com/t5/EF-RF-Lenses/EF-S-17-85mm-f-4-5-6-IS-USM-Lens-Causing-Problems/m-p/392498#M24227 Tronhard 2022-11-03T20:11:28Z https://community.usa.canon.com/t5/EF-RF-Lenses/EF-S-17-85mm-f-4-5-6-IS-USM-Lens-Causing-Problems/m-p/392617#M24233 <P>Bottom line, it is broken and not worth fixing. Buy a new lens. Sorry!</P> Fri, 04 Nov 2022 15:09:35 GMT https://community.usa.canon.com/t5/EF-RF-Lenses/EF-S-17-85mm-f-4-5-6-IS-USM-Lens-Causing-Problems/m-p/392617#M24233 ebiggs1 2022-11-04T15:09:35Z