Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Will this fit on canon 50mm 1.4?
Document: Excellent cap, I bought it for my 50mm 1.8 Canon lens. Is a shame it didn't came with the lens in the box, but at least is available.
This fits on my 1980's era Canon AE-1 50mm lens perfectly. It might be tricky to find out which lens cap fits on your 25 year old camera but this is the one. Shipped quickly and it actually is a better center grip design than the lens caps that have the grip on the outside.
I got this to put on my canon lens. I bought two of them for my 28mm f2.8 and 50mm f1.8 ( mark I)  they fit well and made it look nice on the two lenses. I am glad I could get them at a good price for my canon lenses.
Its an OEM lens cap for the 50mm 1.8f lens. What's not to like? I'm just very happy that I was able to find it on here so cheap.
fit perfectly over my lens. now i have no worries about it getting scratched or dusted while carrying my lens around.
The lens came as it should. It fit well and got the prduct as i wanted in the photo andwill need another one.
this came in Canon packaging and is a perfect replacement for the cap that came with my camera lens and I am going to order more
I got this for my my Canon SX10is camera which was supposed to come with a lens cap but did not. It fits well and is easy to put on and take off.
Exactly what i was expected , very good quality , similar to original canon caps ,i lost mine and I had to buy a new one
These latest Canon caps are excellent in build quality and function. I'm thinking about buying an additional in each of my lens thread sizes so I'll always have back-ups.
Answer: No - I just tried it - it's too small.