Can i use a Pentax SMC FA 28mm-80mm f/3.5-4.7 Lens with the Pentax K110D DSLR camera?

If so... are there any compatibility issues? I would appreciate good answers. thankyou.

I have several Pentax SLRs and DSLRs. All use the KAF bayonet type lenses, and I haven't found any compatibility issues. That is the one reason I went with Pentax DSLRs. I get to save money on lenses. I can shoot film or digi and only switch whichever lens I want to use. It makes it a lot lighter when carrying around two different cameras all day.

I have to say no. You can use PENTAX KAF bayonet mount lens - Usable Lenses: PENTAX KAF2-, KAF-, and KA-mount lenses. Power zoom function not available. K-mount lenses usable with restrictions. S-mount lenses usable with adapter and with restrictions. 67/645 lenses usable with adapter and with restrictions. Try this link. http://www.pentaxslr.com/bodies/k110

Yup, with no issues.

your lens is a KAF lens. Just keep the aperture on the 'A' setting. The camera does not work in auto settings unless the 'A' setting is active on the lens.