How can I define what type of lens do I use for new eventual full frame?

[Paulo26]

How can I define what type of lens do I use o my new eventual full frame? I have an apsc now but want to upgrade eventually.

[shadowsports]

Greetings,

Please provide the camera model you currently own and the lens you intend to buy? 

If you intend to buy a full frame camera, DSLR or mirrorless I would buy a full frame lens.  A full frame lens is compatible with full frame and APS-C, body's.

You cannot mount an EF-S lens on a EF full frame DSLR.   

While you might be able to use an APS-C lens on a full frame mirrorless body, it will lower or diminish the size of the images you are capturing.  It's important you understand this concept.  We're happy to provide more information once you tell us what you own now and what you intend to buy.

[Waddizzle]

Just buy a camera + lens kit.  It’s hard to go wrong with a camera kit.

[LeeP]

Indeed your "no APSC lens on a full-frame body" is spot-on advice. Using a lens that is designed for an APSC sensor on a full-frame camera likely will result in the image not filling the frame and will produce an undesirable effect for general photography. I love using my APSC Rokinon 8mm fisheye on my R8 but I know that the resulting image will be messed up and not suitable as a conventional image. I do it for the strange effect but no one wants a strange effect on every shot. 

[March411]

@Paulo26 What type of photography are you going to be interested in because you may want to consider purchasing a lens that is compatible your main focus.

[shadowsports]

@Paulo26 ,

We understand your shopping based on this and other threads.  As a new photographer, shopping for gear can sometimes be overwhelming.  When ready can you please answer my and @March411's questions. It would be helpful.  Gear you own now, budget, goals, etc.  Thus far, none of your threads have included these details.  Thanks in advance.