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Photo Forum / Digital Photography / Digital Photo / June 2008

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Incompatible jpeg?

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Martin ©¿©¬ @nohere.net - 27 Jun 2008 17:02 GMT
Hi
I have a Canon IXUS 70 Digital Camera and each time I remove the
memory card, put it in the PC, copy the pics, put the card back in the
camera to view the pics, a message comes up for a lot of them saying
'incompatible jpeg'

Would anyone know what is happening between taking the card out &
putting it back in the camera please?
Signature

Martin
©¿©¬

Clair Johnston - 27 Jun 2008 17:19 GMT
> Hi
> I have a Canon IXUS 70 Digital Camera and each time I remove the
[quoted text clipped - 4 lines]
> Would anyone know what is happening between taking the card out &
> putting it back in the camera please?
How/what software do you use to copy the pics?  It is likely that
thumbnails of the images are being created and being written back to the
card.  I would hope/expect that the jpegs are not being modified, but
that is possible.  More than likely the camera is complaining about
thumbnails created to view images.

Clair
J.H. Holliday - 27 Jun 2008 19:52 GMT
>> Hi
>> I have a Canon IXUS 70 Digital Camera and each time I remove the
[quoted text clipped - 10 lines]
>
> Clair

To test, just drag/drop pix from card to HD...
Scott W - 27 Jun 2008 17:20 GMT
> Hi
> I have a Canon IXUS 70 Digital Camera and each time I remove the
[quoted text clipped - 7 lines]
> Martin
> ©¿©¬

I sounds like you might be changing the photos on your PC and saving
them back to the card.
Something as simple as rotating the image would do this.

Scott
David J Taylor - 27 Jun 2008 17:29 GMT
> Hi
> I have a Canon IXUS 70 Digital Camera and each time I remove the
[quoted text clipped - 4 lines]
> Would anyone know what is happening between taking the card out &
> putting it back in the camera please?

Martin,

I wrote some software which can fix-up images for display back on the
camera.  There is a trial version here:

 http://www.satsignal.eu/software/imaging.html#TVwriter

Cheers,
David
Bob  AZ - 28 Jun 2008 02:25 GMT
> Would anyone know what is happening between taking the card out &
> putting it back in the camera please?
> --
> Martin
> ����

Martin

Just a learning thing. I went through it also.

First never remove the card unless there is no other way. In this case
just download the pictures to your computer. Store them in an
organized location.  Then after checking to make sure they are OK make
a CD.

Then erase the card in the camera and go back and take pictures
again.

The less times the card is removed from the camera the better off you
are. A pin repair in the camera body can be $150.00 or more and is not
a warranty item.

Bob  AZ
David J Taylor - 28 Jun 2008 07:24 GMT
Bob AZ wrote:
[]
> Martin
>
[quoted text clipped - 13 lines]
>
> Bob  AZ

Different from my experience, Bob.  In all my years of using CF cards, I
never damaged one or the camera.  I /never/ downloaded from the camera
with a cable, I /always/ used a card reader.

With today's computers, many already have a slot to read the SD cards I
now use, so I have continued my practice of removing the cards from the
camera to read the images.  With SD cards, there are no "pins" in the
camera, and I believe that the flat connections are rather less liable to
damage that the pin/socket combination of a CF card.

Like you, I do format the card in the camera before use, but my immediate
backup is now more likely to be a pair of portable HDs rather than CD/DVD.

Cheers,
David
Ron Hunter - 28 Jun 2008 09:48 GMT
> Bob AZ wrote:
> []
[quoted text clipped - 31 lines]
> Cheers,
> David

My pictures are usually downloaded via a card reader on my laptop, and
then they are copied to TWO other computers for backup.  Since my
'failure rate' with  CDs has been around 75%, I wouldn't even consider
that for a backup medium!
David J Taylor - 28 Jun 2008 11:11 GMT
[]
> My pictures are usually downloaded via a card reader on my laptop, and
> then they are copied to TWO other computers for backup.  Since my
> 'failure rate' with  CDs has been around 75%, I wouldn't even consider
> that for a backup medium!

Yes, I have two computers, and two external HDs, so four disks in all.  I
recently bought the external HDs, and loaded then from my existing CD/DVD
backup.  All but one of the CD/DVDs was readable, and that one had
duplicated data in any case.  [I don't smoke, and the environment here is
not extreme.]  I keep all my processed images ("prints") on all four HDs,
and my "masters" (out of the camera, but with obvious duds removed) on at
least the two external HDs, and on the internal HDs while I'm processing
the data.

Cheers,
David
Chris Malcolm - 29 Jun 2008 09:13 GMT
> Bob AZ wrote:
> []
[quoted text clipped - 15 lines]
>>
>> Bob  AZ

> Different from my experience, Bob.  In all my years of using CF cards, I
> never damaged one or the camera.  I /never/ downloaded from the camera
> with a cable, I /always/ used a card reader.

Me too, in the sense that I've been using CF cards a lot as
transferrable data storage ever since they were invented, with no
trouble at all. I've also been using ink pens and sharp knives for
many decades without any trouble. But I do know that there are people
who can't use a pen without serious risk of an inky mess or a sharp
knife without cutting themselves. They're not the kind of people you'd
want to lend a camera or indeed a CF card to.

Signature

Chris Malcolm        cam@infirmatics.ed.ac.uk              DoD #205
IPAB,  Informatics,  JCMB, King's Buildings, Edinburgh, EH9 3JZ, UK
[http://www.dai.ed.ac.uk/homes/cam/]

Penis Kolada - 28 Jun 2008 07:30 GMT
Bob AZ wrote:
>> Would anyone know what is happening between taking the card out &
>> putting it back in the camera please?
[quoted text clipped - 19 lines]
>
> Bob  AZ

Never remove the card?

I don't know anyone who does anything approaching even hobby levels of
photography who works with only one card. I change mine several times a
week at least and this is my eighth digital camera and I have never had
a need for a pin repair. However, should such a problem arise while
under warranty (and all my cameras are) it would most certainly be
covered by warranty. Using multiple cards in a camera is normal practice
and as such, is covered by the warranty.

By the way, while on the subject of warranty, I never fill in and return
the warranty forms, it limits my rights under law, it means that I am
agreeing to the warranty terms offered by the company rather than those
legislated by my local trading laws. I am still covered, under trade
practice law, even when I do not accept the offer to return the warranty
agreement.

Downloading large raw files via USB when compared to using a high-speed
card reader is enormously time wasting and inconvenient. I carry a
reasonably powerful laptop with a built-in card reader and Photoshop at
all times with my camera gear, and will often swap cards after just a
few shots in order to closely examine them while in situ to make sure I
have what I want before proceeding.

To each his own, but I find your advice to be a little strange.

PK
Ofnuts - 28 Jun 2008 09:48 GMT
> Downloading large raw files via USB when compared to using a high-speed
> card reader is enormously time wasting and inconvenient. I carry a
[quoted text clipped - 4 lines]
>
> To each his own, but I find your advice to be a little strange.

Same here, but at that point it becomes almost a matter of religion,
like operating systems, text editors, Internet browsers...

Signature

Bertrand

Bob  AZ - 28 Jun 2008 23:11 GMT
> To each his own, but I find your advice to be a little strange.
>
> PK

At a college where I do their repair and maintenence they have at
least 20 Canon DSLRs that use CF cards. At least 10 have been out for
pin repair and all cost money to repair. Each camera had a single or
more pin bent and after many years of dealing with bent pins the only
sure repair is replacement. Not sure how the pins are getting bent but
the rule is now no cards removed.

I don't usually work on the DSLRs since I have little training on
SLRs. I suppose I could fix them but it is a matter of having the time
to do this.

For my own photography use there is little or no opportunity to check
things as I go along. On occassion I do bring a small TV monitor that
an assistant or myself can use to watch things. But with every
exposure a potential lighting disaster and no chance to repeat the
exposure I just have to depend on my skills to get the picture. The
last big musical event I shot was 1200 or more images in the space of
4 hours. I do watch the exposure counter and take advantage of a break
in the action to change a card if need be, but with the 12GB SanDisk
cards I use card changing is not an issue.

When downloading  I use the Nikon WIA I think it is program to
download the images to the computer. I have had no problems with CDs
retaining te images. Every so often I back up the CDs with a DVD.

I did note that Canon now has a downloader that has an option to
download just the newly exposed images as well as several other new
options.  Maybe I will get to investigate this later this summer.

As you say to each his own.

Bob  AZ
Allodoxaphobia - 29 Jun 2008 02:17 GMT
On Sat, 28 Jun 2008 15:11:33 -0700 (PDT), Bob AZ wrote:

>> To each his own, but I find your advice to be a little strange.
>
> At a college where I do their repair and maintenence they have at
> least 20 Canon DSLRs that use CF cards. At least 10 have been out for
> pin repair and all cost money to repair. Each camera had a single or
> more pin bent .........

Non sequitur!

In the same vein as:  Politicians see no need to be prudent because they
are not spending _their_ own money ; Students, faculty, and staff see no
need to be careful because they are not (ab)using _their own_ cameras.
(Been there...)

Amongst all my friends and colleagues I have only seen 1 (one) bent pin.
And, this was on a friend's camera that she *lent to her B-I-L* !
With some dentals tools that I have in my kit, I was able to carefully
straighten out the (CF) pin for her.  The camera is still in service.
Jürgen Exner - 29 Jun 2008 03:35 GMT
>> Would anyone know what is happening between taking the card out &
>> putting it back in the camera please?
>
>First never remove the card unless there is no other way. In this case

Nuts! How do you manage multiple cards without removing them from the
camera?

>just download the pictures to your computer.

Easiest way to do that is to plug the card into a decend card reader.
No fumbling around with connector cables ("Where the f*** is that cable
again?" I just had a teen breaking into tears because he was going to
Now York for 5 weeks and couldn't find that cable.), no trying to pry
those tiny rubber plugs from the connector in the camera ---and then
tearing them off and loosing them, no crawling under the desk trying to
find a vacant USB port, ...
And the transfer is way faster, too, and doesn't require any proprietary
software, either(*).

*: Yes, many cameras can be switched into mass storage device mode, but
many can not.

>Then erase the card in the camera and go back and take pictures
>again.
>
>The less times the card is removed from the camera the better off you
>are. A pin repair in the camera body can be $150.00 or more and is not
>a warranty item.

And what's the difference between removing and plugging back a memory
card versus plugging in and removing one of those tiny USB plugs? If at
least all camera manufacturers would use a standard USB or micro USB
socket. But no, many created their own proprietary formats, incompatible
with anything else and even more fragile to make sure, the customer is
"loyal" to their brand.

jue
Martin ©¿©¬ @nohere.net - 28 Jun 2008 12:57 GMT
Thank you all for your replies
My pictures are downloaded via a card reader on my PC or Laptop and
then they are copied to a folder on my hard drive

I make no alterations or adjustments before removing the card &
putting it back in the camera.
Signature

Martin
©¿©¬

pimpom - 29 Jun 2008 13:02 GMT
> Hi
> I have a Canon IXUS 70 Digital Camera and each time I remove
[quoted text clipped - 8 lines]
> &
> putting it back in the camera please?

Have you tried switching the write protection on before inserting
the card into your card reader ?
 
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