Backfocus - shall we gather some statistics? (Yes=1)

iNNOCENt said:

Folks,

There are different opinions on how many of the D70s have/had the
backfocus problems. Some say that only a few units are defective,
others believe that about 3/4 or so...

It could be curious to have a bit of a survey to count the number
of normal and defective (if the unit was defective, but then fixed,
say defective) units among the readers of this forum. I believe the
sample here could be a really good representation of the real
picture, because we are all here from different parts of the world
and evidently bought the cameras from different batches.

This is definitely not of a great help (there's a neglible hope
that Nikon will finally hear the cry and acknowledges the problem),
but I am curious (and perhaps some other people are), what is the
approximate rate of defective units...

If you had 2 or more defective units (i.e. sending one back and
taking another), please state that.

It might be difficult to evaluate the results, but we can try. To
simplify the counting, we can agree on mentioning the number of
defective and normal units one had in the header of the reply.

Thus, please say 'Yes=2' (which means I had two defective units,
e.g. one was changed to another with the same problem and finally
got calibrated.) or 'No=1' (in case the very first unit I own is
OK) in the message header.

So, please do NOT JUST LEAVE THE SUBJECT AS IS, when replying.
Please adjust it, so that it reflects the experience you have.

So, for the start - I have a Back Focus on my D70 (I put 'Yes=1' in
the subject).

I hope this curiosity bothers not only myself.

Thank you in advance!

Click to expand...

iNNOCENt said:

Folks,

There are different opinions on how many of the D70s have/had the
backfocus problems. Some say that only a few units are defective,
others believe that about 3/4 or so...

It could be curious to have a bit of a survey to count the number
of normal and defective (if the unit was defective, but then fixed,
say defective) units among the readers of this forum. I believe the
sample here could be a really good representation of the real
picture, because we are all here from different parts of the world
and evidently bought the cameras from different batches.

This is definitely not of a great help (there's a neglible hope
that Nikon will finally hear the cry and acknowledges the problem),
but I am curious (and perhaps some other people are), what is the
approximate rate of defective units...

If you had 2 or more defective units (i.e. sending one back and
taking another), please state that.

It might be difficult to evaluate the results, but we can try. To
simplify the counting, we can agree on mentioning the number of
defective and normal units one had in the header of the reply.

Thus, please say 'Yes=2' (which means I had two defective units,
e.g. one was changed to another with the same problem and finally
got calibrated.) or 'No=1' (in case the very first unit I own is
OK) in the message header.

So, please do NOT JUST LEAVE THE SUBJECT AS IS, when replying.
Please adjust it, so that it reflects the experience you have.

So, for the start - I have a Back Focus on my D70 (I put 'Yes=1' in
the subject).

I hope this curiosity bothers not only myself.

Thank you in advance!

Click to expand...

iNNOCENt said:

Folks,

There are different opinions on how many of the D70s have/had the
backfocus problems. Some say that only a few units are defective,
others believe that about 3/4 or so...

It could be curious to have a bit of a survey to count the number
of normal and defective (if the unit was defective, but then fixed,
say defective) units among the readers of this forum. I believe the
sample here could be a really good representation of the real
picture, because we are all here from different parts of the world
and evidently bought the cameras from different batches.

This is definitely not of a great help (there's a neglible hope
that Nikon will finally hear the cry and acknowledges the problem),
but I am curious (and perhaps some other people are), what is the
approximate rate of defective units...

If you had 2 or more defective units (i.e. sending one back and
taking another), please state that.

It might be difficult to evaluate the results, but we can try. To
simplify the counting, we can agree on mentioning the number of
defective and normal units one had in the header of the reply.

Thus, please say 'Yes=2' (which means I had two defective units,
e.g. one was changed to another with the same problem and finally
got calibrated.) or 'No=1' (in case the very first unit I own is
OK) in the message header.

So, please do NOT JUST LEAVE THE SUBJECT AS IS, when replying.
Please adjust it, so that it reflects the experience you have.

So, for the start - I have a Back Focus on my D70 (I put 'Yes=1' in
the subject).

I hope this curiosity bothers not only myself.

Thank you in advance!

Click to expand...

iNNOCENt said:

Folks,

There are different opinions on how many of the D70s have/had the
backfocus problems. Some say that only a few units are defective,
others believe that about 3/4 or so...

It could be curious to have a bit of a survey to count the number
of normal and defective (if the unit was defective, but then fixed,
say defective) units among the readers of this forum. I believe the
sample here could be a really good representation of the real
picture, because we are all here from different parts of the world
and evidently bought the cameras from different batches.

This is definitely not of a great help (there's a neglible hope
that Nikon will finally hear the cry and acknowledges the problem),
but I am curious (and perhaps some other people are), what is the
approximate rate of defective units...

If you had 2 or more defective units (i.e. sending one back and
taking another), please state that.

It might be difficult to evaluate the results, but we can try. To
simplify the counting, we can agree on mentioning the number of
defective and normal units one had in the header of the reply.

Thus, please say 'Yes=2' (which means I had two defective units,
e.g. one was changed to another with the same problem and finally
got calibrated.) or 'No=1' (in case the very first unit I own is
OK) in the message header.

So, please do NOT JUST LEAVE THE SUBJECT AS IS, when replying.
Please adjust it, so that it reflects the experience you have.

So, for the start - I have a Back Focus on my D70 (I put 'Yes=1' in
the subject).

I hope this curiosity bothers not only myself.

Thank you in advance!

Click to expand...

iNNOCENt said:

Folks,

There are different opinions on how many of the D70s have/had the
backfocus problems. Some say that only a few units are defective,
others believe that about 3/4 or so...

It could be curious to have a bit of a survey to count the number
of normal and defective (if the unit was defective, but then fixed,
say defective) units among the readers of this forum. I believe the
sample here could be a really good representation of the real
picture, because we are all here from different parts of the world
and evidently bought the cameras from different batches.

This is definitely not of a great help (there's a neglible hope
that Nikon will finally hear the cry and acknowledges the problem),
but I am curious (and perhaps some other people are), what is the
approximate rate of defective units...

If you had 2 or more defective units (i.e. sending one back and
taking another), please state that.

It might be difficult to evaluate the results, but we can try. To
simplify the counting, we can agree on mentioning the number of
defective and normal units one had in the header of the reply.

Thus, please say 'Yes=2' (which means I had two defective units,
e.g. one was changed to another with the same problem and finally
got calibrated.) or 'No=1' (in case the very first unit I own is
OK) in the message header.

So, please do NOT JUST LEAVE THE SUBJECT AS IS, when replying.
Please adjust it, so that it reflects the experience you have.

So, for the start - I have a Back Focus on my D70 (I put 'Yes=1' in
the subject).

I hope this curiosity bothers not only myself.

Thank you in advance!

Click to expand...

Albusan said:

iNNOCENt said:

Folks,

There are different opinions on how many of the D70s have/had the
backfocus problems. Some say that only a few units are defective,
others believe that about 3/4 or so...

It could be curious to have a bit of a survey to count the number
of normal and defective (if the unit was defective, but then fixed,
say defective) units among the readers of this forum. I believe the
sample here could be a really good representation of the real
picture, because we are all here from different parts of the world
and evidently bought the cameras from different batches.

This is definitely not of a great help (there's a neglible hope
that Nikon will finally hear the cry and acknowledges the problem),
but I am curious (and perhaps some other people are), what is the
approximate rate of defective units...

If you had 2 or more defective units (i.e. sending one back and
taking another), please state that.

It might be difficult to evaluate the results, but we can try. To
simplify the counting, we can agree on mentioning the number of
defective and normal units one had in the header of the reply.

Thus, please say 'Yes=2' (which means I had two defective units,
e.g. one was changed to another with the same problem and finally
got calibrated.) or 'No=1' (in case the very first unit I own is
OK) in the message header.

So, please do NOT JUST LEAVE THE SUBJECT AS IS, when replying.
Please adjust it, so that it reflects the experience you have.

So, for the start - I have a Back Focus on my D70 (I put 'Yes=1' in
the subject).

I hope this curiosity bothers not only myself.

Thank you in advance!

Click to expand...

--
Albusan, Bandung, Indonesia.

Click to expand...

iNNOCENt said:

Folks,

There are different opinions on how many of the D70s have/had the
backfocus problems. Some say that only a few units are defective,
others believe that about 3/4 or so...

It could be curious to have a bit of a survey to count the number
of normal and defective (if the unit was defective, but then fixed,
say defective) units among the readers of this forum. I believe the
sample here could be a really good representation of the real
picture, because we are all here from different parts of the world
and evidently bought the cameras from different batches.

This is definitely not of a great help (there's a neglible hope
that Nikon will finally hear the cry and acknowledges the problem),
but I am curious (and perhaps some other people are), what is the
approximate rate of defective units...

If you had 2 or more defective units (i.e. sending one back and
taking another), please state that.

It might be difficult to evaluate the results, but we can try. To
simplify the counting, we can agree on mentioning the number of
defective and normal units one had in the header of the reply.

Thus, please say 'Yes=2' (which means I had two defective units,
e.g. one was changed to another with the same problem and finally
got calibrated.) or 'No=1' (in case the very first unit I own is
OK) in the message header.

So, please do NOT JUST LEAVE THE SUBJECT AS IS, when replying.
Please adjust it, so that it reflects the experience you have.

So, for the start - I have a Back Focus on my D70 (I put 'Yes=1' in
the subject).

I hope this curiosity bothers not only myself.

Thank you in advance!

Click to expand...

iNNOCENt said:

Folks,

There are different opinions on how many of the D70s have/had the
backfocus problems. Some say that only a few units are defective,
others believe that about 3/4 or so...

It could be curious to have a bit of a survey to count the number
of normal and defective (if the unit was defective, but then fixed,
say defective) units among the readers of this forum. I believe the
sample here could be a really good representation of the real
picture, because we are all here from different parts of the world
and evidently bought the cameras from different batches.

This is definitely not of a great help (there's a neglible hope
that Nikon will finally hear the cry and acknowledges the problem),
but I am curious (and perhaps some other people are), what is the
approximate rate of defective units...

If you had 2 or more defective units (i.e. sending one back and
taking another), please state that.

It might be difficult to evaluate the results, but we can try. To
simplify the counting, we can agree on mentioning the number of
defective and normal units one had in the header of the reply.

Thus, please say 'Yes=2' (which means I had two defective units,
e.g. one was changed to another with the same problem and finally
got calibrated.) or 'No=1' (in case the very first unit I own is
OK) in the message header.

So, please do NOT JUST LEAVE THE SUBJECT AS IS, when replying.
Please adjust it, so that it reflects the experience you have.

So, for the start - I have a Back Focus on my D70 (I put 'Yes=1' in
the subject).

I hope this curiosity bothers not only myself.

Thank you in advance!

Click to expand...

Bob F. said:

Albusan said:

iNNOCENt said:

Folks,

There are different opinions on how many of the D70s have/had the
backfocus problems. Some say that only a few units are defective,
others believe that about 3/4 or so...

It could be curious to have a bit of a survey to count the number
of normal and defective (if the unit was defective, but then fixed,
say defective) units among the readers of this forum. I believe the
sample here could be a really good representation of the real
picture, because we are all here from different parts of the world
and evidently bought the cameras from different batches.

This is definitely not of a great help (there's a neglible hope
that Nikon will finally hear the cry and acknowledges the problem),
but I am curious (and perhaps some other people are), what is the
approximate rate of defective units...

If you had 2 or more defective units (i.e. sending one back and
taking another), please state that.

It might be difficult to evaluate the results, but we can try. To
simplify the counting, we can agree on mentioning the number of
defective and normal units one had in the header of the reply.

Thus, please say 'Yes=2' (which means I had two defective units,
e.g. one was changed to another with the same problem and finally
got calibrated.) or 'No=1' (in case the very first unit I own is
OK) in the message header.

So, please do NOT JUST LEAVE THE SUBJECT AS IS, when replying.
Please adjust it, so that it reflects the experience you have.

So, for the start - I have a Back Focus on my D70 (I put 'Yes=1' in
the subject).

I hope this curiosity bothers not only myself.

Thank you in advance!

Click to expand...

--
Albusan, Bandung, Indonesia.

Click to expand...

Click to expand...

iNNOCENt said:

Folks,

There are different opinions on how many of the D70s have/had the
backfocus problems. Some say that only a few units are defective,
others believe that about 3/4 or so...

It could be curious to have a bit of a survey to count the number
of normal and defective (if the unit was defective, but then fixed,
say defective) units among the readers of this forum. I believe the
sample here could be a really good representation of the real
picture, because we are all here from different parts of the world
and evidently bought the cameras from different batches.

This is definitely not of a great help (there's a neglible hope
that Nikon will finally hear the cry and acknowledges the problem),
but I am curious (and perhaps some other people are), what is the
approximate rate of defective units...

If you had 2 or more defective units (i.e. sending one back and
taking another), please state that.

It might be difficult to evaluate the results, but we can try. To
simplify the counting, we can agree on mentioning the number of
defective and normal units one had in the header of the reply.

Thus, please say 'Yes=2' (which means I had two defective units,
e.g. one was changed to another with the same problem and finally
got calibrated.) or 'No=1' (in case the very first unit I own is
OK) in the message header.

So, please do NOT JUST LEAVE THE SUBJECT AS IS, when replying.
Please adjust it, so that it reflects the experience you have.

So, for the start - I have a Back Focus on my D70 (I put 'Yes=1' in
the subject).

I hope this curiosity bothers not only myself.

Thank you in advance!

Click to expand...

Tom Karlo said:

From a statistical standpoint, you're not going to learn anything
about the rate of backfocus.

1. This topic survey is self selective. Someone who has BF is far,
far more likely to respond than a randomly selected Nikon D70
purchaser.

2. Your sample size isn't going to be large enough to have any
meaning at all. I'm too lazy to work the exact number, but if we're
talking about something that occurs at a rate of maybe 2-5%, you're
going to need hundreds, if not thousands, of responses to get a
usable number.

(Determining it's 5% is meaningless if you have a confidence
interval of 5% in either direction -- meaning it could be anywhere
from 0% to 10%.)

Sorry... but that's just the truth of it. You're not going to get
any real data, and it produces a very negative image that we're all
obsessed with the BF problem.

Tom
--

Click to expand...

iNNOCENt said:

Folks,

There are different opinions on how many of the D70s have/had the
backfocus problems. Some say that only a few units are defective,
others believe that about 3/4 or so...

It could be curious to have a bit of a survey to count the number
of normal and defective (if the unit was defective, but then fixed,
say defective) units among the readers of this forum. I believe the
sample here could be a really good representation of the real
picture, because we are all here from different parts of the world
and evidently bought the cameras from different batches.

This is definitely not of a great help (there's a neglible hope
that Nikon will finally hear the cry and acknowledges the problem),
but I am curious (and perhaps some other people are), what is the
approximate rate of defective units...

If you had 2 or more defective units (i.e. sending one back and
taking another), please state that.

It might be difficult to evaluate the results, but we can try. To
simplify the counting, we can agree on mentioning the number of
defective and normal units one had in the header of the reply.

Thus, please say 'Yes=2' (which means I had two defective units,
e.g. one was changed to another with the same problem and finally
got calibrated.) or 'No=1' (in case the very first unit I own is
OK) in the message header.

So, please do NOT JUST LEAVE THE SUBJECT AS IS, when replying.
Please adjust it, so that it reflects the experience you have.

So, for the start - I have a Back Focus on my D70 (I put 'Yes=1' in
the subject).

I hope this curiosity bothers not only myself.

Thank you in advance!

Click to expand...