topic Re: EOS EFS 10-18mm in EF & RF Lenses

EOS EFS 10-18mm

john_star_man — Mon, 24 Sep 2018 12:28:04 GMT

Hi All,

I'm new to photography & getting to grips with my EOS80D + 10-18mm. My interest is seascape/ landscape. I've noticed that in a large % of my images I have issues with lens flare even when I have back to sun or sun is not even in image or obscured by thick cloud. Is this a known problem. I've attached a sample image to show you the issue - this is a full size crop from a problem image. In this instance sun was in image which has exacerbated problem

Really appreciate any help - thks, John

Re: EOS EFS 10-18mm

kvbarkley — Mon, 24 Sep 2018 12:47:06 GMT

That is not flare, that is cruft in the lens or sensor, it probably needs to be sent to Canon for cleaning.

Re: EOS EFS 10-18mm

john_star_man — Mon, 24 Sep 2018 13:17:18 GMT

Many thanks for you quick response. The camera / Lens is pretty much brand new so I am suprised it would be so dirty - I have had a UV on lens since new. Looking at the lens I can't see any dirt. Also I don't see such issues if I take shots inside etc.which makes me think its not lens or sensor dirt?

Thks, John

Re: EOS EFS 10-18mm

kvbarkley — Mon, 24 Sep 2018 21:15:42 GMT

Check out this review by Ken Rockwell:

https://www.kenrockwell.com/canon/lenses/10-18mm.htm

Where he specifically looks for flare. I see no indication of what you are seeing.

(If the link gets scrubbed, google Ken Rockwell Canon lens and scroll down to the lens.)

Re: EOS EFS 10-18mm

ebiggs1 — Mon, 24 Sep 2018 22:44:18 GMT

Try a lens hood.

Re: EOS EFS 10-18mm

ebiggs1 — Mon, 24 Sep 2018 22:45:01 GMT

Oh, and BTW, remove any filter you may have attached to the lens.

Re: EOS EFS 10-18mm

john_star_man — Tue, 25 Sep 2018 15:14:30 GMT

Thks for all the advice - I'll try & be a bit more methodical with testing next time I shoot. Thks again, John

Re: EOS EFS 10-18mm

RobertTheFat — Tue, 25 Sep 2018 20:54:08 GMT

@kvbarkley wrote:
That is not flare, that is cruft in the lens or sensor, it probably needs to be sent to Canon for cleaning.

It looks like flare to me. Dirt on the sensor is usually less OOF and tends to be more prominent in light areas than in dark. I'd start by taking Ernie's advice to use a lens hood and no filter.

Re: EOS EFS 10-18mm

kvbarkley — Tue, 25 Sep 2018 21:35:28 GMT

I think it is scattering off of a bunch of particles. Besides, he says that he sees it when his back is to the sun, a hood won't help there!

Re: EOS EFS 10-18mm

RobertTheFat — Tue, 25 Sep 2018 21:52:47 GMT

@kvbarkley wrote:
I think it is scattering off of a bunch of particles. Besides, he says that he sees it when his back is to the sun, a hood won't help there!

You don't have to have the sun in your FOV to get flare. All you need is a spot bright enough to reflect off the lens and then off the back surface of the filter.

Eight or ten years ago my main walkaround lens was a well made but optically challenged Sigma 18-50mm f/2.8. I couldn't trust it not to exhibit flare, no matter what direction I was facing.

Re: EOS EFS 10-18mm

kvbarkley — Tue, 25 Sep 2018 22:28:48 GMT

In any case, that is not typical of the EF-S 10-18mm.

Re: EOS EFS 10-18mm

Waddizzle — Tue, 25 Sep 2018 23:17:41 GMT

@john_star_man wrote:
Many thanks for you quick response. The camera / Lens is pretty much brand new so I am suprised it would be so dirty - I have had a UV on lens since new. Looking at the lens I can't see any dirt. Also I don't see such issues if I take shots inside etc.which makes me think its not lens or sensor dirt?

Thks, John

Looks a whole lot like ocean spray to me. Did you change lenses at the beach?

Instead of thinking, try to be an objective observer.

Re: EOS EFS 10-18mm

John_SD — Wed, 26 Sep 2018 02:57:20 GMT

It looks like dried droplets to me, but I assume you've tried to clean your lens (or filter) with a microfiber cloth.

Like you, I also shoot at the ocean and around tide pools. Get yourself a circular polarizer if you're in that environment. Used properly, you'll notice an immediate improvement in your photos, especially in terms of cutting glare and darkening the skies. And you won't be getting salt water on your lens.

Re: EOS EFS 10-18mm

RobertTheFat — Wed, 26 Sep 2018 16:15:24 GMT

@John_SD wrote:
It looks like dried droplets to me, but I assume you've tried to clean your lens (or filter) with a microfiber cloth.

Like you, I also shoot at the ocean and around tide pools. Get yourself a circular polarizer if you're in that environment. Used properly, you'll notice an immediate improvement in your photos, especially in terms of cutting glare and darkening the skies. And you won't be getting salt water on your lens.

If they're dried droplets (which I sort of doubt), they'd pretty well have to be on the sensor. If they were on the lens surface, they'd be visible only as a vague fogging of the overall image. They'd be way too far from the focal plane to show up as well defined circles.

The closest I ever came to seeing what the sample picture shows was once when a colleague at work had oil droplets on his sensor. In that case the camera was a Brand N model that was known for having an overlubricated mirror mechanism that could throw oil on the sensor. I've never heard of a Canon camera with a similar problem.

Re: EOS EFS 10-18mm

john_star_man — Thu, 27 Sep 2018 15:00:00 GMT

Thanks everyone for all the advice & comments - Hope to get out this weekend with some more tests/ observing - I'll let you know if I figure out where the problem lies.

Cheers, John