Yongnuo lens won't fit on EOS Rebel T3i

[Somenewguy]

New guy with a T3I, bought a lens and now im stuck

SO i recently bought a T3i, with the kit lens, i take pictures of a product ( i make dice), and people told me i needed a prime lens to get the depth of field etc and the pics i wanted. i use a lightbox, etc, so i bought a Yongnuo EF YN 50mm f/1.8 MF Lens for Canon , off ebay

Im sure you all probably know whats next, so this lens  doesnt fit my camera, so now i dont even know what the heck to look for, lol

so my questions are two fold.

1. is there an adapter of some kind to fit this lens to my camera and is it even worth it?

2. What kind of lens should i be looking for, what the big thing that i need to make sure of to make sure the lens will fit my camera. I assumed ef and ef=s are what fits my camera, now im completely confused.

Thank you for your help! Feel free to laugh at me. im terribly new to cameras like this.

[Tronhard · Accepted solution]

I would not go to a higher stop the f/11. You risk diffraction issues that will soften the image.

[Tronhard · Accepted solution]

I would not go to a higher stop the f/11. You risk diffraction issues that will soften the image.

[normadel · Accepted solution]

Somenewguy:

Depth of field is determined by f/stop and magnification. Higher magnification yields less depth of field.

The picture of dice indicates you are getting very close to the subject . The closer you get, the higher the magnification, and the shorter depth of field you get. You were focused at the plane of number 13, which looks sharp. Everything in front of it and behind it is unfocused.

What you can do is , beside using small aperture, is back up some, get more depth of field and more focused dice, then crop the photo later.