topic Re: 75-300mm Camera lens mark on my picture in EF & RF Lenses

75-300mm Camera lens mark on my picture

grayden_O — Tue, 11 Feb 2025 21:55:21 GMT

i have a canon 75-300mm zoom lens and when ever i use the lens it leave mark on my picture i was wondering if there is anyway to fix that??

Re: 75-300mm Camera lens mark on my picture

kvbarkley — Tue, 11 Feb 2025 21:56:26 GMT

Can you show us an example of this "mark"?

Chances are it is not on the lens, but the sensor, like in my image here:

See the blotch by the wing?

Re: 75-300mm Camera lens mark on my picture

deebatman316 — Tue, 11 Feb 2025 23:38:02 GMT

That looks like dust on the image sensor.

Re: 75-300mm Camera lens mark on my picture

Ron888 — Wed, 12 Feb 2025 00:43:29 GMT

Agreed.Hair and dust on the sensor.

Re: 75-300mm Camera lens mark on my picture

FloridaDrafter — Wed, 12 Feb 2025 00:58:44 GMT

Hello, grayden_O!

That is dust and lint on your sensor. Since your Rebel T7 does not have a built in sensor cleaning function, you have three choices. 1) Have a local camera shop clean it. 2) Send it to Canon for a cleaning. 3) Buy a cleaning kit and do it yourself.

You could start by just buying a Giottos Rocket blower [Screenshot included below to facilitate conversation], which you should have anyway, but it will help remove any loose dust and lint on your sensor, lens, and camera. But you may need a sensor brush or even a sensor swab if the smaller ones, as shown in your image, are stubborn. If you are at all squeamish about fooling around in the mirror box, options 1 and 2 are the way to go.

Newton

Re: 75-300mm Camera lens mark on my picture

justadude — Thu, 13 Feb 2025 16:01:30 GMT

Just adding my 2 cents for Graydon_O in addition to your spot on reply (no pun intended - haha).

For option 3 on doing this yourself... Most photographers I know (myself included) were nervous about doing this ourselves the first time... figured I would destroy something. Watch a YouTube video, and you will see how simple it really is. Save your money by doing it yourself.

Re: 75-300mm Camera lens mark on my picture

Tintype_18 — Thu, 13 Feb 2025 20:13:07 GMT

Interesting question and replies. Maybe off topic: One book I have says to point the camera body down when changing lenses to prevent any nasties from getting into the camera. So far, so good.

Re: 75-300mm Camera lens mark on my picture

justadude — Thu, 13 Feb 2025 23:25:28 GMT

That's one of those things that we should be doing, but often don't. If I'm switching lenses between two bodies, I'll usually have them both on their back, and slap the body cap on as soon as the lens comes off the first body, quickly switch lenses on the second, then remove the cover and put the lens on the first. Not ideal of course.

Another thing that helps is to use the rocket blower at the end of every shooting session if a lens has been changed that day.

Re: 75-300mm Camera lens mark on my picture

ebiggs1 — Fri, 14 Feb 2025 15:18:06 GMT

In the last 50 years or so I just change lenses at will nothing special.Now I did get caught out in a white out snow storm in the Colorado Rockies on a winter shoot so it's probably not a good idea, and I didn't to change lenses then, but unless it is so for you or you are in a dust storm change your lenses. Common sense always seems to rule so use it.