Cheap SD Cards

On 11/17/2017 7:25 PM, Savageduck wrote:
On Nov 17, 2017, PeterN wrote
(in article ):

On 11/17/2017 11:56 AM, Savageduck wrote:
On Nov 17, 2017, PeterN wrote
(in article ):

On 11/16/2017 10:50 PM, Savageduck wrote:
On Nov 16, 2017, PeterN wrote
(in article ):


Sunday I did a quick sunset shoot. Out of 46 images, several had weird
colors in unusual portions of the images.

That shouldn’t be a problem for you. weird colors in unusual portions of
the images should be right in your wheelhouse. ;-)

Not like this:
https://www.dropbox.com/s/4n3mlqf07qwmt10/_DSC7524.NEF?dl=0

Yup! That looks like a corrupt file issue. As to where that corruption is
happening one can best surmise that it was the card. However, there can be
all sorts of causes, mostly due to current, clearing the buffer, and writing
issues. So it would be best to run a check with a known good performing card
to eliminate possible issues with the camera.

What was the brand of the card in question, what was its rating, and which
camera were you using?

D800, and a Delkin Black. I complained to Delkin. They are sending me a
reader, and requested that I test the card with that reader. The shot
you see is a ten shot multiple exposure. I was testing to see how much
time was needed between shots, to get a similar effect to a long
exposure. despite the corruption, my conclusion is that it can be done.
In a calm bay it takes about 2.5 seconds between each shot, for a ten
shot exposure.

What is a Delkin Black?

Delkin Black is meaningless, all that tells us is who the manufacturer is.
What is the actual read/write speed of the card?

Also, because you have somewhat explained what you were doing with multiple
exposures, I suspect that this was just a slow card choking on what was being
fed it, and unable to clear the camera buffer. I have a feeling that if you
just used it to shoot a single exposure there might be no problem at all. If
you are going to use a high performance camera, you should use high
performance cards regardless of how tempting it might be to go the budget
card route.

Google is your friend:
https://www.delkindevices.com/product/black-memory-cards/



--
PeterN

On 11/17/2017 9:59 PM, Savageduck wrote:
On Nov 17, 2017, Bill W wrote
(in ):

On Fri, 17 Nov 2017 16:25:29 -0800, Savageduck
wrote:

On Nov 17, 2017, PeterN wrote
(in article ):

On 11/17/2017 11:56 AM, Savageduck wrote:
On Nov 17, 2017, PeterN wrote
(in article ):

On 11/16/2017 10:50 PM, Savageduck wrote:
On Nov 16, 2017, PeterN wrote
(in article ):


Sunday I did a quick sunset shoot. Out of 46 images, several had weird
colors in unusual portions of the images.

That shouldn’t be a problem for you. weird colors in unusual portions
of
the images should be right in your wheelhouse. ;-)

Not like this:
https://www.dropbox.com/s/4n3mlqf07qwmt10/_DSC7524.NEF?dl=0

Yup! That looks like a corrupt file issue. As to where that corruption is
happening one can best surmise that it was the card. However, there can be
all sorts of causes, mostly due to current, clearing the buffer, and
writing
issues. So it would be best to run a check with a known good performing
card
to eliminate possible issues with the camera.

What was the brand of the card in question, what was its rating, and which
camera were you using?

D800, and a Delkin Black. I complained to Delkin. They are sending me a
reader, and requested that I test the card with that reader. The shot
you see is a ten shot multiple exposure. I was testing to see how much
time was needed between shots, to get a similar effect to a long
exposure. despite the corruption, my conclusion is that it can be done.
In a calm bay it takes about 2.5 seconds between each shot, for a ten
shot exposure.

What is a Delkin Black?

Delkin Black is meaningless, all that tells us is who the manufacturer is.
What is the actual read/write speed of the card?

Also, because you have somewhat explained what you were doing with multiple
exposures, I suspect that this was just a slow card choking on what was
being
fed it, and unable to clear the camera buffer. I have a feeling that if you
just used it to shoot a single exposure there might be no problem at all. If
you are going to use a high performance camera, you should use high
performance cards regardless of how tempting it might be to go the budget
card route.

I agree with this - I doubt that card corruption or partial failure
was the cause of the issue he had.

I believe the first thing to establish is what the specs of the SD card are.

Delkin produce good products including SD and CF cards. However, they produce
SD cards with a wide range of specs and prices, some are truly fast cards
with corresponding higher prices. Since Peter, in his subject line, and his
OP narative hinted that the SD card in question was “cheap�, I am
inclined to assume that this card has slow read/write specs. Hence the
corruption problems when faced with a high performance camera trying to clear
the buffer as fast as it can, into a card which can’t write fast enough.


The D800 is not a high speed camera, especially when using SD.
While I did not do the research myself, the information about SD being
slower came from a Lexar engineer, who I met. When shooting at the
highest speed SD is definitely slower than CF, on my D800. When I called
Delkin, the seemed to think it was my reader that was causing the problem.


--
PeterN

On 11/18/2017 2:54 AM, Savageduck wrote:
On Nov 17, 2017, Eric Stevens wrote
(in ):

On Fri, 17 Nov 2017 18:59:35 -0800, Savageduck
wrote:

--- snip ---

Also, because you have somewhat explained what you were doing with
multiple exposures, I suspect that this was just a slow card choking on what was
being fed it, and unable to clear the camera buffer. I have a feeling that if
you just used it to shoot a single exposure there might be no problem at all.
If you are going to use a high performance camera, you should use high
performance cards regardless of how tempting it might be to go the budget
card route.

I agree with this - I doubt that card corruption or partial failure
was the cause of the issue he had.

I believe the first thing to establish is what the specs of the SD card are.

Delkin produce good products including SD and CF cards. However, they
produce SD cards with a wide range of specs and prices, some are truly fast cards
with corresponding higher prices. Since Peter, in his subject line, and his
OP narative hinted that the SD card in question was “cheap�, I am
inclined to assume that this card has slow read/write specs. Hence the
corruption problems when faced with a high performance camera trying to
clear the buffer as fast as it can, into a card which can’t write fast enough.

And through all of this discussion and theorising not one of the
resident Nikon owners/users remember that In the back of (at least)
most of their manuals Nikon specifies the minimum standard of common
memory cards which will run with the particular camera. What does it
say for the D800?

Beats me!

I don’t own a D800, as a matter of fact I don’t own any FF Nikon DSLR,
and I have no idea if Peter RTFM, and he is the only Nikon user who counts in
this discussion. So perhaps you could assist, and provide that snippet of
information, or perhaps Peter will let us know if he has RTFM.


Not the whole manual, but I checked and Delkin Black exceeds the specs.

--
PeterN

On Nov 18, 2017, PeterN wrote
(in article ):

On 11/17/2017 7:25 PM, Savageduck wrote:
On Nov 17, 2017, PeterN wrote
(in article ):

On 11/17/2017 11:56 AM, Savageduck wrote:
On Nov 17, 2017, PeterN wrote
(in article ):

On 11/16/2017 10:50 PM, Savageduck wrote:
On Nov 16, 2017, PeterN wrote
(in article ):


Sunday I did a quick sunset shoot. Out of 46 images, several had weird
colors in unusual portions of the images.

That shouldn’t be a problem for you. weird colors in unusual portions
of
the images should be right in your wheelhouse. ;-)

Not like this:
https://www.dropbox.com/s/4n3mlqf07qwmt10/_DSC7524.NEF?dl=0

Yup! That looks like a corrupt file issue. As to where that corruption is
happening one can best surmise that it was the card. However, there can be
all sorts of causes, mostly due to current, clearing the buffer, and
writing
issues. So it would be best to run a check with a known good performing
card
to eliminate possible issues with the camera.

What was the brand of the card in question, what was its rating, and which
camera were you using?

D800, and a Delkin Black. I complained to Delkin. They are sending me a
reader, and requested that I test the card with that reader. The shot
you see is a ten shot multiple exposure. I was testing to see how much
time was needed between shots, to get a similar effect to a long
exposure. despite the corruption, my conclusion is that it can be done.
In a calm bay it takes about 2.5 seconds between each shot, for a ten
shot exposure.

What is a Delkin Black?

Delkin Black is meaningless, all that tells us is who the manufacturer is.
What is the actual read/write speed of the card?

Also, because you have somewhat explained what you were doing with multiple
exposures, I suspect that this was just a slow card choking on what was
being
fed it, and unable to clear the camera buffer. I have a feeling that if you
just used it to shoot a single exposure there might be no problem at all. If
you are going to use a high performance camera, you should use high
performance cards regardless of how tempting it might be to go the budget
card route.
Google is your friend:
https://www.delkindevices.com/product/black-memory-cards/

....and you have yet to tell us what the actual rating is. Google does not
tell us what is printed on the SD card in your possession.
Which of these Black cards did you buy?

--

Regards,
Savageduck

In article , Eric Stevens
wrote:

And through all of this discussion and theorising not one of the
resident Nikon owners/users remember that In the back of (at least)
most of their manuals Nikon specifies the minimum standard of common
memory cards which will run with the particular camera. What does it
say for the D800?

nikon and others have a list of cards they've tested and are on their
approved list.

that doesn't mean other cards won't work or that a card from the
approved list might fail.

On 11/18/2017 12:30 PM, Savageduck wrote:
On Nov 18, 2017, PeterN wrote
(in article ):

On 11/17/2017 7:25 PM, Savageduck wrote:
On Nov 17, 2017, PeterN wrote
(in article ):

On 11/17/2017 11:56 AM, Savageduck wrote:
On Nov 17, 2017, PeterN wrote
(in article ):

On 11/16/2017 10:50 PM, Savageduck wrote:
On Nov 16, 2017, PeterN wrote
(in article ):


Sunday I did a quick sunset shoot. Out of 46 images, several had weird
colors in unusual portions of the images.

That shouldn’t be a problem for you. weird colors in unusual portions
of
the images should be right in your wheelhouse. ;-)

Not like this:
https://www.dropbox.com/s/4n3mlqf07qwmt10/_DSC7524.NEF?dl=0

Yup! That looks like a corrupt file issue. As to where that corruption is
happening one can best surmise that it was the card. However, there can be
all sorts of causes, mostly due to current, clearing the buffer, and
writing
issues. So it would be best to run a check with a known good performing
card
to eliminate possible issues with the camera.

What was the brand of the card in question, what was its rating, and which
camera were you using?

D800, and a Delkin Black. I complained to Delkin. They are sending me a
reader, and requested that I test the card with that reader. The shot
you see is a ten shot multiple exposure. I was testing to see how much
time was needed between shots, to get a similar effect to a long
exposure. despite the corruption, my conclusion is that it can be done.
In a calm bay it takes about 2.5 seconds between each shot, for a ten
shot exposure.

What is a Delkin Black?

Delkin Black is meaningless, all that tells us is who the manufacturer is.
What is the actual read/write speed of the card?

Also, because you have somewhat explained what you were doing with multiple
exposures, I suspect that this was just a slow card choking on what was
being
fed it, and unable to clear the camera buffer. I have a feeling that if you
just used it to shoot a single exposure there might be no problem at all. If
you are going to use a high performance camera, you should use high
performance cards regardless of how tempting it might be to go the budget
card route.
Google is your friend:
https://www.delkindevices.com/product/black-memory-cards/

...and you have yet to tell us what the actual rating is. Google does not
tell us what is printed on the SD card in your possession.
Which of these Black cards did you buy?


UHS-II. As I said earlier, card speed is not an issue with SD on a D800.
That is not a combination where R/W speed is important.


--
PeterN

On Nov 18, 2017, PeterN wrote
(in article ):

On 11/17/2017 9:59 PM, Savageduck wrote:
On Nov 17, 2017, Bill W wrote
(in ):

On Fri, 17 Nov 2017 16:25:29 -0800, Savageduck
wrote:

On Nov 17, 2017, PeterN wrote
(in article ):

On 11/17/2017 11:56 AM, Savageduck wrote:
On Nov 17, 2017, PeterN wrote
(in article ):

On 11/16/2017 10:50 PM, Savageduck wrote:
On Nov 16, 2017, PeterN wrote
(in article ):


Sunday I did a quick sunset shoot. Out of 46 images, several had
weird
colors in unusual portions of the images.

That shouldn’t be a problem for you. weird colors in unusual
portions
of
the images should be right in your wheelhouse. ;-)

Not like this:
https://www.dropbox.com/s/4n3mlqf07qwmt10/_DSC7524.NEF?dl=0

Yup! That looks like a corrupt file issue. As to where that corruption
is
happening one can best surmise that it was the card. However, there can
be
all sorts of causes, mostly due to current, clearing the buffer, and
writing
issues. So it would be best to run a check with a known good performing
card
to eliminate possible issues with the camera.

What was the brand of the card in question, what was its rating, and
which
camera were you using?

D800, and a Delkin Black. I complained to Delkin. They are sending me a
reader, and requested that I test the card with that reader. The shot
you see is a ten shot multiple exposure. I was testing to see how much
time was needed between shots, to get a similar effect to a long
exposure. despite the corruption, my conclusion is that it can be done.
In a calm bay it takes about 2.5 seconds between each shot, for a ten
shot exposure.

What is a Delkin Black?

Delkin Black is meaningless, all that tells us is who the manufacturer is.
What is the actual read/write speed of the card?

Also, because you have somewhat explained what you were doing with
multiple
exposures, I suspect that this was just a slow card choking on what was
being
fed it, and unable to clear the camera buffer. I have a feeling that if
you
just used it to shoot a single exposure there might be no problem at all.
If
you are going to use a high performance camera, you should use high
performance cards regardless of how tempting it might be to go the budget
card route.

I agree with this - I doubt that card corruption or partial failure
was the cause of the issue he had.

I believe the first thing to establish is what the specs of the SD card are.

Delkin produce good products including SD and CF cards. However, they
produce SD cards with a wide range of specs and prices, some are truly fast cards
with corresponding higher prices. Since Peter, in his subject line, and his
OP narative hinted that the SD card in question was “cheap�, I am
inclined to assume that this card has slow read/write specs. Hence the
corruption problems when faced with a high performance camera trying to
clear the buffer as fast as it can, into a card which can’t write fast enough.

The D800 is not a high speed camera, especially when using SD.
While I did not do the research myself, the information about SD being
slower came from a Lexar engineer, who I met. When shooting at the
highest speed SD is definitely slower than CF, on my D800.

Strange, there should only be a speed difference if you are using different
rated CF and SD cards. I never had that speed differential issue with my
D300S which is two years older than your D800.

When I called Delkin, the seemed to think it was my reader that was causing the problem.

Focus shift, move the blame to the user.

Have you had an issue reading any other SD cards?

Have you tried to shoot single exposures using that card?

--

Regards,
Savageduck

On Nov 18, 2017, PeterN wrote
(in article ):

On 11/18/2017 2:54 AM, Savageduck wrote:
On Nov 17, 2017, Eric Stevens wrote
(in ):

On Fri, 17 Nov 2017 18:59:35 -0800, Savageduck
wrote:

--- snip ---

Also, because you have somewhat explained what you were doing with
multiple exposures, I suspect that this was just a slow card choking on
what was
being fed it, and unable to clear the camera buffer. I have a feeling
that if
you just used it to shoot a single exposure there might be no problem
at all.
If you are going to use a high performance camera, you should use high
performance cards regardless of how tempting it might be to go the
budget
card route.

I agree with this - I doubt that card corruption or partial failure
was the cause of the issue he had.

I believe the first thing to establish is what the specs of the SD card
are.

Delkin produce good products including SD and CF cards. However, they
produce SD cards with a wide range of specs and prices, some are truly
fast cards
with corresponding higher prices. Since Peter, in his subject line, and
his
OP narative hinted that the SD card in question was “cheap�, I am
inclined to assume that this card has slow read/write specs. Hence the
corruption problems when faced with a high performance camera trying to
clear the buffer as fast as it can, into a card which can’t write fast
enough.

And through all of this discussion and theorising not one of the
resident Nikon owners/users remember that In the back of (at least)
most of their manuals Nikon specifies the minimum standard of common
memory cards which will run with the particular camera. What does it
say for the D800?

Beats me!

I don’t own a D800, as a matter of fact I don’t own any FF Nikon DSLR,
and I have no idea if Peter RTFM, and he is the only Nikon user who counts
in
this discussion. So perhaps you could assist, and provide that snippet of
information, or perhaps Peter will let us know if he has RTFM.

Not the whole manual, but I checked and Delkin Black exceeds the specs.

Which Delkin Black exceeds the specs? They have a whole range of read/write
specs, all at different price points. You still haven’t told us the
read/write specs for your specific Delkin Black SD card. I still contend that
if you used your Delkin card for normal shooting, rather than the
multi-exposure exercise you were engaged in, there might well be no issues.

--

Regards,
Savageduck

On Nov 18, 2017, PeterN wrote
(in article ):

On 11/18/2017 12:30 PM, Savageduck wrote:
On Nov 18, 2017, PeterN wrote
(in article ):

On 11/17/2017 7:25 PM, Savageduck wrote:
On Nov 17, 2017, PeterN wrote
(in article ):

On 11/17/2017 11:56 AM, Savageduck wrote:
On Nov 17, 2017, PeterN wrote
(in article ):

On 11/16/2017 10:50 PM, Savageduck wrote:
On Nov 16, 2017, PeterN wrote
(in article ):


Sunday I did a quick sunset shoot. Out of 46 images, several had
weird
colors in unusual portions of the images.

That shouldn’t be a problem for you. weird colors in unusual
portions
of
the images should be right in your wheelhouse. ;-)

Not like this:
https://www.dropbox.com/s/4n3mlqf07qwmt10/_DSC7524.NEF?dl=0

Yup! That looks like a corrupt file issue. As to where that corruption
is
happening one can best surmise that it was the card. However, there can
be
all sorts of causes, mostly due to current, clearing the buffer, and
writing
issues. So it would be best to run a check with a known good performing
card
to eliminate possible issues with the camera.

What was the brand of the card in question, what was its rating, and
which
camera were you using?

D800, and a Delkin Black. I complained to Delkin. They are sending me a
reader, and requested that I test the card with that reader. The shot
you see is a ten shot multiple exposure. I was testing to see how much
time was needed between shots, to get a similar effect to a long
exposure. despite the corruption, my conclusion is that it can be done.
In a calm bay it takes about 2.5 seconds between each shot, for a ten
shot exposure.

What is a Delkin Black?

Delkin Black is meaningless, all that tells us is who the manufacturer is.
What is the actual read/write speed of the card?

Also, because you have somewhat explained what you were doing with
multiple exposures, I suspect that this was just a slow card choking on what was
being fed it, and unable to clear the camera buffer. I have a feeling that if
you just used it to shoot a single exposure there might be no problem at all.
If you are going to use a high performance camera, you should use high
performance cards regardless of how tempting it might be to go the budget
card route.
Google is your friend:
https://www.delkindevices.com/product/black-memory-cards/

...and you have yet to tell us what the actual rating is. Google does not
tell us what is printed on the SD card in your possession.
Which of these Black cards did you buy?

UHS-II. As I said earlier, card speed is not an issue with SD on a D800.
That is not a combination where R/W speed is important.

UHS-II is just a class of card, still no R/W speed. Typically UHS-II cards
are not bargain basement cards, and you describe this particular card as
cheap.

Card speed is always an issue D800 or any other camera. R/W speed might not
be that important when shooting normal single shots, but you were engaged in
shooting multiple exposures.

--

Regards,
Savageduck

On 11/17/2017 07:25 PM, Savageduck wrote:
On Nov 17, 2017, PeterN wrote
(in article ):

On 11/17/2017 11:56 AM, Savageduck wrote:
On Nov 17, 2017, PeterN wrote
(in article ):

On 11/16/2017 10:50 PM, Savageduck wrote:
On Nov 16, 2017, PeterN wrote
(in article ):


Sunday I did a quick sunset shoot. Out of 46 images, several had weird
colors in unusual portions of the images.

That shouldn’t be a problem for you. weird colors in unusual portions of
the images should be right in your wheelhouse. ;-)

Not like this:
https://www.dropbox.com/s/4n3mlqf07qwmt10/_DSC7524.NEF?dl=0

Yup! That looks like a corrupt file issue. As to where that corruption is
happening one can best surmise that it was the card. However, there can be
all sorts of causes, mostly due to current, clearing the buffer, and writing
issues. So it would be best to run a check with a known good performing card
to eliminate possible issues with the camera.

What was the brand of the card in question, what was its rating, and which
camera were you using?

D800, and a Delkin Black. I complained to Delkin. They are sending me a
reader, and requested that I test the card with that reader. The shot
you see is a ten shot multiple exposure. I was testing to see how much
time was needed between shots, to get a similar effect to a long
exposure. despite the corruption, my conclusion is that it can be done.
In a calm bay it takes about 2.5 seconds between each shot, for a ten
shot exposure.

What is a Delkin Black?

Delkin Black is meaningless, all that tells us is who the manufacturer is.
What is the actual read/write speed of the card?

Also, because you have somewhat explained what you were doing with multiple
exposures, I suspect that this was just a slow card choking on what was being
fed it, and unable to clear the camera buffer. I have a feeling that if you
just used it to shoot a single exposure there might be no problem at all. If
you are going to use a high performance camera, you should use high
performance cards regardless of how tempting it might be to go the budget
card route.


I have to concur with SD. I have seen a very similar effect when copying
photo files from one drive to another and the copy was interrupted.
(this is from the days of slow drives and RS-232 null modem cables.)


--
Ken Hart