Bad sensor dust

Carlos E.R. wrote:
On 04/02/2019 15.33, Savageduck wrote:
Carlos E.R. wrote:
On 03/02/2019 17.24, Savageduck wrote:
Carlos E.R. wrote:
On 03/02/2019 14.20, Savageduck wrote:
Savageduck wrote:
Alfred Molon wrote:
Here is an example:
https://www.flickr.com/photos/marcod...2963838558/in/
album-72157705868008995/

The blobs at the top left are the most visible ones, but
there actually are dust blobs across the entire frame.
And apparently the photographer wasan't even aware of
the dust, as the blobs are on all or almost all images.

Yup!
The dust is very conspicuous, and is going to need some major fixing in
post. That sensor is in dire need of cleaning, and the photographer should
have taken an emergency cleaning kit with him on that trip. When you know
that you are going to be in an environment with wind, dust, and sand, there
is no excuse for not being prepared. At a minimum a lot of care should be
taken with lens changes.

That assumes he knows how to use that kit (I don't). Maybe he takes the
camera to a shop to be cleaned by a professional back home that knows
how to do it, and he wouldn't dare try to do it himself, even less on a
trip.


If he does not know how to go about cleaning the sensor on a DSLR, or MILC,
he, and anybody who owns one should invest in the basic tools, correct size
swabs, PEC pad, a Giottos Rocket, a bottle of Eclipse Fluid, and a
magnifier with some sort of illuminator.

I don't have any of that, nor my friends. I don't even know what they are.

All it takes to find out what 'they are' is to search, and then buy. Amazon
should lead you right to those items. Then you will have more knowledge
than your friends.

I'll wait till I can see someone doing it.



Then make the effort to learn how to go about cleaning a sensor, even on
the road away from home. Especially if one is in an environment where dust
contamination is likely.

I had no idea about dust, and sensor cleaning until I got my first DSLR, a
Nikon D70. I learned very quickly.


Also, I believe the evidence that he is either oblivious to the problem, or
just doesn't care is demonstrated by his posting of all those contaminated
photographs to Flickr with no effort to fix anything.

Well, maybe the photos themselves are important (to him) and he can not
go back to repeat them. I have photos like that, with errors, but they
are important to me.

If they were important to him he should have taken care when producing
them. He could certainly have cleaned up the spots on the images with post
processing before publishing them in Flickr.

I wouldn't know how.

Are you reluctant to learn anything?

Certainly not :-)

Good!

But I don't go criticizing somebody which posts some far from perfect
photos, for reasons we don't know about. I only try to point out, as he
is not here to defend himself, that there may be reasons.

There is such a thing as constructive criticism, and he (and you)should
consider this a learning moment in the journey as a photographer using an
interchangeable lens camera (ILC).

Maybe he did not intend you to see them, LOL! :-D

That much is obvious.

Maybe he doesn't know how to clean them, and there are no cleaning
services in Algeria.

....or he is blissfully unaware of just how bad his images appear because of
the dust.

If you look at the end of his album, there is no dust:

https://www.flickr.com/photos/marcodileo/6680221601/

If you go to page 20, I can see just one big speckle on the left on some
photos. Maybe by that time he had found out how to clean the sensor or
took the camera to some place.

I doubt that he has learned anything. A closer look reveals dust spots all
over his images.

People take time to learn, after all.

There is nothing to indicate that he is in anyway aware of the problem. All
it would take is a little effort and republishing to Flickr.

Me, I would not have posted with that defect without an explanation.


Good.


Cleaning up unwanted dust spots or other blemishes is a feature of most
photo editing software, even some of the free software.


Sure, but those are huge. Anyway, what that software does is some kind
of interpolation, because the data of those pixels under the dust is
lost forever.

Different software does different things in different ways, quite a number
use content aware algorithms to go about making clean-up edits with minimal
damage to the underlying image. The cleaned up result will be much better
than the spot contaminated original.



What camera do you shoot?

...and which camera was it that you use?

Oh, a Nikon D3200. What I could afford. I'm not a professional.

There is nothing wrong with a D3200. It is an entry level DSLR, but
everybody has to start somewhere.


If you have photos that are important to you, but have "errors", do
whatever you can to fix those errors in post. That is why editing tools
exist.

You can not correct focus on post.


That is a whole different problem.

It is. But it is the one I might want to correct, I don't have dust.


You don't have dust spots YET. Sooner or later they will be there, and the
photos will need fixing, and the sensor on your camera will need cleaning.

--
Regards,
Savageduck

In article , Eric Stevens
wrote:

what do my delimited links look like?

read your posts and find out for yourself.

As you well know, different news readers treat them in different ways.
What it might look like to him need not be the same as the way it
looks to you.

it's plain text.

some newsreaders will make the links clickable, but that's about the
only difference.

In article , Carlos E.R.
wrote:

If you have photos that are important to you, but have "errors", do
whatever you can to fix those errors in post. That is why editing tools
exist.

You can not correct focus on post.

false.

photoshop and several other tools, such as focus magic can help fix out
of focus images:
http://focusmagic.com

I have my doubts, even after seeing the samples.

doubt all you want. it works quite well in many cases. obviously not
every case. nothing is perfect.

It will be expensive,
out of my bracket.

it's not expensive and there are even free options available.

and price is not the issue anyway. you said it can't be done, and it
can.

In article , Carlos E.R.
wrote:

That assumes he knows how to use that kit (I don't).

it's never too late to learn. read the instructions

No such instructions on mine. They say to bring the camera to the
service shop.

what cleaning kit did you buy that did not include instructions??

I bought a camera.

excellent, except that the topic is cleaning kits.

No, it is "bad sensor dust". I never bought or implied I had bought a
cleaning kit.

bad sensor dust is remedied with a cleaning kit, which you said you do
not know how to use.

cleaning kits come with instructions. read them and you'll know how. or
watch a couple of videos. in some cases, no instructions are needed,
such as a rocket blower. it's obvious how it works.




or maybe he doesn't care.

You do not know that.

it's quite clear he doesn't care, else he wouldn't have posted a photo
full of dust spots which looks like utter ****.

Not to me.

seriously? that photo was overwhelmed with dust spots.

So? Maybe you were not the intended target.

the intended target is irrelevant.

the photo has a ****load of dust, as does his other photos.

he clearly doesn't give a ****.

In article , dale
wrote:

what do my delimited links look like?

read your posts and find out for yourself.

https://www.flickr.com/photos/marcod...um-72157705868
008995/

nospam ... *my* delimited posts of the OP's URL post and read fine, this
doesn't give me any inkling of how it reads and reposts on *other* software

you have no control over what other people use which is why it's
important to use rfc compliant links. if there's a problem, it's at
*their* end.

as I mentioned before there is no configuration of some text editors to
see LF and/or CR and/or EOL and/or other formatting ... so why should I
be able to know the difference in a newsreader, *unless* you let me know
how my editor's posts reads on your reader

that makes absolutely no difference.

modern software handles all line endings.

only ****ty software has issues.

In article ,
lid says...
If you look at the end of his album, there is no dust:

https://www.flickr.com/photos/marcodileo/6680221601/

That is from 2011, taken with a different camera.
--
Alfred Molon

Olympus E-series DSLRs and micro 4/3 forum at
https://tech.groups.yahoo.com/group/MyOlympus/
https://myolympus.org/ photo sharing site

On Tue, 05 Feb 2019 11:07:23 -0500, nospam
wrote:

In article , Eric Stevens
wrote:

what do my delimited links look like?

read your posts and find out for yourself.

As you well know, different news readers treat them in different ways.
What it might look like to him need not be the same as the way it
looks to you.

it's plain text.

some newsreaders will make the links clickable, but that's about the
only difference.

Cooperative as usual I see.
--

Regards,

Eric Stevens

In article , Eric Stevens
wrote:

what do my delimited links look like?

read your posts and find out for yourself.

As you well know, different news readers treat them in different ways.
What it might look like to him need not be the same as the way it
looks to you.

it's plain text.

some newsreaders will make the links clickable, but that's about the
only difference.

Cooperative as usual I see.

ad hominem.

On 05/02/2019 15.30, Savageduck wrote:
Carlos E.R. wrote:




What camera do you shoot?

...and which camera was it that you use?

Oh, a Nikon D3200. What I could afford. I'm not a professional.

There is nothing wrong with a D3200. It is an entry level DSLR, but
everybody has to start somewhere.

I didn't say it was wrong.


If you have photos that are important to you, but have "errors", do
whatever you can to fix those errors in post. That is why editing tools
exist.

You can not correct focus on post.


That is a whole different problem.

It is. But it is the one I might want to correct, I don't have dust.


You don't have dust spots YET. Sooner or later they will be there, and the
photos will need fixing, and the sensor on your camera will need cleaning.

And at that time I will clean them :-)

--
Cheers, Carlos.

On 05/02/2019 17.07, nospam wrote:
In article , Carlos E.R.
wrote:

If you have photos that are important to you, but have "errors", do
whatever you can to fix those errors in post. That is why editing tools
exist.

You can not correct focus on post.

false.

photoshop and several other tools, such as focus magic can help fix out
of focus images:
http://focusmagic.com

I have my doubts, even after seeing the samples.

doubt all you want. it works quite well in many cases. obviously not
every case. nothing is perfect.

It will be expensive,
out of my bracket.

it's not expensive and there are even free options available.

Please tell those free options.


and price is not the issue anyway. you said it can't be done, and it
can.

I'll believe when I see it. I read bad critics about that software you
posted, maybe even here.

Information is lost with bad focus: to repair that, data has to be
"created", thus false.

--
Cheers, Carlos.