topic Re: EF 70-300mm lense in EF & RF Lenses

EF 70-300mm bubbles in front lens

wanderlust — Tue, 16 Jul 2024 15:30:12 GMT

I just purchased a new canon EF 70-300mm lense. The lense has small bubbles in the front lense.

I have never seen this in any other camera lense prior except for the same lense purchased thru Amazon, I returned it and purchased from a camera store.

Thoughts

Re: EF 70-300mm lense

kvbarkley — Mon, 15 Jul 2024 15:28:23 GMT

"I have never seen this in any other camera lense prior except for the same lense purchased thru Amazon, I returned it and purchased from a camera store."

This is unclear, but it sounds like the sames lens is circulating around. Good move to get it from an authorized dealer. Not all Amazon shops are authorized canon dealers.

I assume that this is a 70-300 *II*, since the original version is not sold anymore.

Actually, you would be hard pressed to see any image degradation from this.

Re: EF 70-300mm lense

normadel — Mon, 15 Jul 2024 20:10:34 GMT

Buying decisions aside, small bubbles do not degrade image quality, nor do scratches on the front element, internal dust and minor fungus. Nothing on or inside the lens is focused, and doesn't show up on the image.

Re: EF 70-300mm lense

kvbarkley — Mon, 15 Jul 2024 22:20:12 GMT

As I said. The only image degradation you might see is a lowering of contrast due to light scattering.

Re: EF 70-300mm lense

ebiggs1 — Tue, 16 Jul 2024 14:09:37 GMT

"As I said. The only image degradation you might see is a lowering of contrast due to light scattering."

Correct, sir, and it would take a lot of "bubbles" to degrade contrast. However ...

"Not all Amazon shops are authorized canon dealers." The lenses are the same whether authorized USA or not. That shouldn't matter if USA support and warranty is not wanted. To me I would not buy unauthorized photo gear but others may not feel that way.