Clone dust specks? - DPChallenge Forums

Nikon AF-S Nikkor 16-35 f/4 ED VR

07/03/2007 10:39:37 PM · #1

I saw the following comment recently: "...you can clone out dust specks in basic now"

This isn't true, is it? I thought you could only clone sensor dust or hot pixels. Can anyone clarify this?

LanndonKane

Nikon D800

07/03/2007 10:40:56 PM · #2

Why don't you take a peep at the rules and see for yourself?

Besides, the only way you'd see dust is if it was on the sensor. Dust on the lense would never be visible on a photograph, unless it was a huge piece of dust and very very close focusing macro lense.

Unless you were taking a picture of something dusty. Then the dust is part of the image, I would imagine you wouldn't be able to clone that dust out in basic editing.

Message edited by author 2007-07-03 22:43:24.

sabphoto

Samsung Galaxy S8/S8+

07/03/2007 10:42:12 PM · #3

it does say "dust and scratches"

jdannels

Nikon D300s

Sigma 30mm f/1.4 EX DC HSM for Nikon

07/03/2007 10:46:36 PM · #4

I just sent an inquiry about this. I had some very small water specs on my filter from a recent shoot for one of the open challenges. They said I couldn't take them out, only sensor dust and hot pixels. I think of it as in camera and can't be taken care no matter how careful you shoot.
From frisca in a PM respnse:
only sensor dust and hot pixels are permitted to be removed in basic, so removal of the water drops on your filter is not allowed.

LanndonKane

Nikon D800

Nikon AF-S Nikkor 16-35 f/4 ED VR

07/03/2007 10:54:34 PM · #5

Oh yeah filters, forgot about those. I don't use em, so they didn't come to mind.

Fujifilm XF 55-200mm f/3.5-4.8 R LM OIS

07/03/2007 11:06:56 PM · #6

Thanks for the replies. I wonder why the original writer thought something had changed! Had me going for a minute there :-)

ursula

Fujifilm X-T2

07/03/2007 11:16:46 PM · #7

It is sensor dust (or dust bunnies) and hot pixels (which happen rarely) that you can clone. Dust from dirty filters or lenses, or dust on the object being photographed, doesn't count. Same goes for smudges or water drops on a filter or a lens (they can't be cloned away in basic). Only sensor dust or hot pixels.

"Dust and scratches" is a noise reduction filter. It's different than dust and scratches as you would find them on an object. It is allowed in basic. In my view, it's one of those "strong" filters. You can use it sometimes, but for the most part it takes away so much detail in your image that it isn't worth it to use it.

Hope this helps.

07/03/2007 11:22:05 PM · #8

What I'd really like to be able to do in basic editing is clone out tiny specular reflections. Just have to live with them!

Fujifilm XF 55-200mm f/3.5-4.8 R LM OIS

07/03/2007 11:23:25 PM · #9

BTW, ursula, your photo "summer" is stunning. Wow!

ursula

Fujifilm X-T2

07/03/2007 11:51:15 PM · #10

Originally posted by wlevy:

BTW, ursula, your photo "summer" is stunning. Wow!

Thank you :)

GeneralE

Canon PowerShot S3 IS

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

07/04/2007 12:05:50 AM · #11

Originally posted by LanndonKane:

Besides, the only way you'd see dust is if it was on the sensor. Dust on the lense would never be visible on a photograph, unless it was a huge piece of dust and very very close focusing macro lense.

The Canon Powershot S-series cameras have a "Super-Macro" mode which will focus at 0cm -- it will in fact focus (pretty sharply!) on dust on the lens surface if there's nothing else in the field of view it can focus on (or with manual focus).

07/04/2007 01:42:13 AM · #12

Originally posted by ursula:

It is sensor dust (or dust bunnies) and hot pixels (which happen rarely) that you can clone. Dust from dirty filters or lenses, or dust on the object being photographed, doesn't count.

Ok. I'm not sure I'm understanding this correctly. Are you saying we have to be able to tell the difference between sensor dust and dirt trapped in a lens.. and only clone out the former?

Nikon AF Nikkor 50mm f/1.8D

07/05/2007 01:46:01 PM · #13

It would be great to get a clarification on this before the next basic editing challenge comes due. Thanks.

frisca

Nikon D70

07/05/2007 01:49:25 PM · #14

Originally posted by skewsme:

Originally posted by ursula:
It is sensor dust (or dust bunnies) and hot pixels (which happen rarely) that you can clone. Dust from dirty filters or lenses, or dust on the object being photographed, doesn't count.

Ok. I'm not sure I'm understanding this correctly. Are you saying we have to be able to tell the difference between sensor dust and dirt trapped in a lens.. and only clone out the former?

its not hard to tell the difference between the two, so YES you must be able to tell the difference (since sensor dust looks like weird alien blobs on your image) and only clone that out, and not dust or dirt on your lens.

jdannels

Nikon D300s

Sigma 30mm f/1.4 EX DC HSM for Nikon

07/05/2007 01:56:08 PM · #15

Originally posted by frisca:

Originally posted by skewsme:

Ok. I'm not sure I'm understanding this correctly. Are you saying we have to be able to tell the difference between sensor dust and dirt trapped in a lens.. and only clone out the former?

its not hard to tell the difference between the two, so YES you must be able to tell the difference (since sensor dust looks like weird alien blobs on your image) and only clone that out, and not dust or dirt on your lens.

Are you sure you two are talking about the same thing? I think

skewsme might be asking about dust actually in the lens, which couldn't be avoided no matter how careful you are when you shoot.

frisca you are replying to dust on the lens, the part that can be wiped clean. Just curious if you were on the same page. I would think maybe dust in the lens might be clonable, but it isn't addressed in the rules as alright.

GeneralE

Canon PowerShot S3 IS

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

07/05/2007 02:02:40 PM · #16

Dust in the lens is a long-standing problem which needs to be addressed ahead of time -- it is not dust which drifted in during a lens change where it's not practical to clean the sensor in the field, or dust on the lens which could be wiped off.

The photographer has the option to get the lens cleaned or use a different lens for that shot.

Or wait for an Advanced challenge ...

scalvert

Canon EOS-5D Mark III

Canon EF 24-105mm f/4.0L IS

07/05/2007 02:02:45 PM · #17

Dust IN the lens will never be visible in your photo since it's always completely out of focus (it would only cause a very slight loss of light and contrast). The only spots that can be cloned out are sensor dust, which show up as dark, fuzzy circles as shown in the sky on this shot:

Message edited by author 2007-07-05 14:04:18.

jdannels

Nikon D300s

Sigma 30mm f/1.4 EX DC HSM for Nikon

07/05/2007 02:15:21 PM · #18

Originally posted by scalvert:

The only spots that can be cloned out are sensor dust, which show up as dark, fuzzy circles as shown in the sky on this shot:

Oh I know all about sensor dust :P. I think the fact that you can now clone them out for basic challenges has really let it accumulate on my sensor. And I didn't know they wouldn't show up in the photo if there was dust in the lens, thats interesting. I was just trying to clarify between frisca and skewsme. :)
Basically, if its not sensor dust or hot pixel leave it or you'll be Dq'ed. Got it :)
Edit:spelking

Message edited by author 2007-07-05 14:16:06.

Nikon AF-S Nikkor 16-35 f/4 ED VR

07/05/2007 02:47:11 PM · #19

Thank you, jdannels, much appreciated.

I have had dust show up that is not on the surface of my lens or the filter, and is not a nice round blob like sensor dust usually is. It shows up just like sensor dust - long exposures and small apertures. I have to check to see whether it occurs with all my lenses or not. It's kinda hairy-lookin'. Perhaps I have a piece of fuzz on my sensor?

LanndonKane

Nikon D800

07/09/2007 06:44:03 PM · #20

Geez, im tempted to get that camera just for that setting :P

Originally posted by skewsme:

KarenNfld

07/09/2007 08:15:08 PM · #21

Originally posted by wlevy:

I saw the following comment recently: "...you can clone out dust specks in basic now"

This isn't true, is it? I thought you could only clone sensor dust or hot pixels. Can anyone clarify this?

I believe I made that comment on your photo and I was referring to sensor dust, which is what the specks on your photo looked like. Sorry for any confusion. :)