Nikon D7100 1.3x option
Aug 23, 2015 11:13:10 #
It is not the full EXIF data as it does not show a change in the lens data, at DX the 105mm should record 157.5mm and it doesn't. So either you massaged the EXIF data or you did not provide the image you say you did.
oldtigger wrote:
i just downloaded the images from the forum and the exif data is intact.
Aug 23, 2015 11:19:47 #
Brucej67 wrote:
It is not the full EXIF data as it does not show a change in the lens data, at DX the 105mm should record 157.5mm and it doesn't. So either you massaged the EXIF data or you did not provide the image you say you did.
OOps, my bad.
i added the DX to the FX image.
Heres what you wanted.
Aug 23, 2015 11:28:22 #
Your DX mode is showing 105mm and should be showing 157.5mm. Are you sure you switched the mode to DX?
oldtigger wrote:
OOps, my bad.
i added the DX to the FX image.
Heres what you wanted.
i added the DX to the FX image.
Heres what you wanted.
Aug 23, 2015 11:32:52 #
Brucej67 wrote:
Your DX mode is showing 105mm and should be showing 157.5mm. Are you sure you switched the mode to DX?
i just downloaded the dx image from uhh and it shows a lens of 157
Aug 23, 2015 11:48:34 #
Hu.
oldtigger wrote:
i just downloaded the dx image from uhh and it shows a lens of 157
Aug 23, 2015 11:58:51 #
Brucej67 wrote:
Hu.
your exif reader isn't reading the exif data correctly, see bottom line of this screen capture, or the FastStone exif data.
actually, its reading it correctly, its just not indicating the 'crop factor'.
Aug 23, 2015 13:25:33 #
oldtigger wrote:
Show us an image test that proves the DX mode resolution suffers.
I know I said I wouldn't write again. I had this great thought so please forgive me.
Oldtigger, you might be on to something. Why stop at 1.3x ??
If there is no loss of resolution, they could take an even smaller portion of the image and blow it up! Nikon must have overlooked the obvious!! They could do away away with optical zoom altogether, you've obviously shown that digital zoom is just as good. You've proven it !!! My hat is off to you.
Aug 23, 2015 13:44:11 #
Howard5252 wrote:
I know I said I wouldn't write again. I had this great thought so please forgive me.
Oldtigger, you might be on to something. Why stop at 1.3x ??
If there is no loss of resolution, they could take an even smaller portion of the image and blow it up! Nikon must have overlooked the obvious!! They could do away away with optical zoom altogether, you've obviously shown that digital zoom is just as good. You've proven it !!! My hat is off to you.
Oldtigger, you might be on to something. Why stop at 1.3x ??
If there is no loss of resolution, they could take an even smaller portion of the image and blow it up! Nikon must have overlooked the obvious!! They could do away away with optical zoom altogether, you've obviously shown that digital zoom is just as good. You've proven it !!! My hat is off to you.
Since a digital zoom can never be better than the native mode in terms of IQ and resolution and blowing up an image degrades both IQ and resolution so what would you gain by using it?
The optical zoom improves both.
Aug 23, 2015 14:01:52 #
oldtigger wrote:
Since a digital zoom can never be better than the native mode in terms of IQ and resolution and blowing up an image degrades both IQ and resolution so what would you gain by using it?
The optical zoom improves both.
The optical zoom improves both.
So just what is it that you have been trying to prove, or think you have proven?
Aug 23, 2015 14:43:56 #
He doesn't know the meaning of resolution no matter how you show him. He is out-of-step with the professionals in photography and marches to the beat of his own ignorance. No matter what you do you will not change him or his beliefs.
Howard5252 wrote:
So just what is it that you have been trying to prove, or think you have proven?
Aug 23, 2015 14:43:59 #
Howard5252 wrote:
So just what is it that you have been trying to prove, or think you have proven?
that the resolution of a d7100 in 1.3 mode is identical to its resolution in full size mode.
Nothing more, nothing less.
Aug 23, 2015 14:55:15 #
oldtigger wrote:
that the resolution of a d7100 in 1.3 mode is identical to its resolution in full size mode.
Nothing more, nothing less.
Nothing more, nothing less.
So let's take this step by step. Can we agree that at the 1.3x setting a smaller number of pixels are being used to produce the image size? Nikon says this is so. Do you agree? If not, I refer you to page 68 of the owner's manual. Let me know, so I can continue.
Aug 23, 2015 15:00:06 #
I was through this with him. My wife said to me who is the bigger fool, the fool or the person arguing with the fool. He will not concede to anything.
Howard5252 wrote:
So let's take this step by step. Can we agree that at the 1.3x setting a smaller number of pixels are being used to produce the image size? Nikon says this is so. Do you agree? If not, I refer you to page 68 of the owner's manual. Let me know, so I can continue.
Aug 23, 2015 15:04:45 #
Howard5252 wrote:
So let's take this step by step. Can we agree that at the 1.3x setting a smaller number of pixels are being used to produce the image size? Nikon says this is so. Do you agree? If not, I refer you to page 68 of the owner's manual. Let me know, so I can continue.
no, we do not agree, and nikon says nothing about this subject.
Nikon discusses the image area(sensor size).
Exactly the same number of pixels are used to record any given element in the image whether it is in normal or 1.3 mode.
The fact that the normal mode has some pixels left over to record stuff that does not appear in the 1.3 mode image does not have any bearing on the resolution of what does appear.
This post is not about what the reduced area mode fails to see, it is about the resolution of what it does see.
Aug 23, 2015 15:32:15 #
oldtigger wrote:
no, we do not agree, and nikon says nothing about... (show quote)
On Page 68 of the D7100 owner's manual, Nikon has a chart. This chart shows choices for Image Area. The two areas shown are DX (24 x 16) and 1.3 x (18 x 12). The chart shows 3 Image Sizes (Large, Medium, Small) and for each of the Image Area choices it lists the number of PIXELS at every choice. The number of PIXELS listed at the 1.3 x choices (large,medium,small) is always LESS than the comparable DX choice. So ... at any print size, the number of PIXELS available is always less at the 1.3x Image Area choice.
If you produced two prints of the same size (which I believe you did) but one had fewer PIXELS, what word would you use to describe the difference between the two?
What it comes down to is A PIXEL IS A PIXEL IS A PIXEL. But if you have fewer of them to record detail, ... guess what suffers?
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