Nikon 1.3 Crop: When I put my D7500 into 1.3 crop, am I multiplying my 300mm lens by 1.5 and then 1.3? I am confused on what the 1.3 really does in camera.

digitalnut Loc: Endwell, NY

When I put my D7500 into 1.3 crop, am I multiplying my 300mm lens by 1.5 and then 1.3? I am confused on what the 1.3 really does in camera.

ricardo00

digitalnut wrote:

When I put my D7500 into 1.3 crop, am I multiplying my 300mm lens by 1.5 and then 1.3? I am confused on what the 1.3 really does in camera.

When you put the D7500 in the 1.3 crop mode, the 35mm equivalent of your 300mm lens becomes 600mm (yes 1.5 times 1.3). However, if you photograph without crop mode, then crop your photo, you get the same result. So the advantages of being in crop mode are that your files are smaller (not sure if you are shooting raw?) and the viewfinder shows the smaller portion of the screen.

larryepage Loc: North Texas area

digitalnut wrote:

When I put my D7500 into 1.3 crop, am I multiplying my 300mm lens by 1.5 and then 1.3? I am confused on what the 1.3 really does in camera.

It's pretty simple really. It cuts your sensor from 24x16mm to 18x12mm. In doing so, it cuts your file sizes (and overall resolution) almost in half. You'd be left with about an 11MP image. About the only reason to do that would be to speed up shooting a little bit or maybe produce smaller files for emailing or maybe some other reason. But if you need it, it's there.

Longshadow Loc: Audubon, PA, United States

larryepage wrote:

It's pretty simple really. It cuts your sensor from 24x16mm to 18x12mm. In doing so, it cuts your file sizes (and overall resolution) almost in half. You'd be left with about an 11MP image. About the only reason to do that would be to speed up shooting a little bit or maybe produce smaller files for emailing or maybe some other reason. But if you need it, it's there.

The resolution changes when the image is enlarged, the resolution of the portion of the sensor used does not change, correct?

Bill_de Loc: US

larryepage wrote:

It's pretty simple really. It cuts your sensor from 24x16mm to 18x12mm. In doing so, it cuts your file sizes (and overall resolution) almost in half. You'd be left with about an 11MP image. About the only reason to do that would be to speed up shooting a little bit or maybe produce smaller files for emailing or maybe some other reason. But if you need it, it's there.

We need to remember that it wasn't so many years ago that 11mp was the cat's meow.
Forty plus MP sounds cool, but how often do we take advantage of it?

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Longshadow Loc: Audubon, PA, United States

Bill_de wrote:

We need to remember that it wasn't so many years ago that 11mp was the cat's meow.
Forty plus MP sounds cool, but how often do we take advantage of it?

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The more the better, arrr.

My first digital was 1Mp.
That's ONE, not a typo.

SuperflyTNT Loc: Manassas VA

Longshadow wrote:

The resolution changes when the image is enlarged, the resolution of the portion of the sensor used does not change, correct?

I’m not sure what you mean by “enlarged”. The resolution changes when you either crop the photo or save it at a lower resolution or if you “resize” it. It has nothing to do with a physical size. “Enlarging” is if you’re creating a physical print and has no effect on resolution.

Longshadow Loc: Audubon, PA, United States

SuperflyTNT wrote:

I’m not sure what you mean by “enlarged”. The resolution changes when you either crop the photo or save it at a lower resolution or if you “resize” it. It has nothing to do with a physical size. “Enlarging” is if you’re creating a physical print and has no effect on resolution.

Does the resolution of the captured image change because the sensor resolution changes in that mode?

larryepage Loc: North Texas area

Longshadow wrote:

The resolution changes when the image is enlarged, the resolution of the portion of the sensor used does not change, correct?

Same sensor. Same density. Just less of it.

Longshadow Loc: Audubon, PA, United States

larryepage wrote:

Same sensor. Same density. Just less of it.

So the sensor resolution does not change, just the resultant image based on the size the image is made to.

SuperflyTNT Loc: Manassas VA

Longshadow wrote:

Does the resolution of the captured image change because the sensor resolution changes in that mode?

The sensor resolution doesn’t change but if you’re only using part of the sensor the resolution will equal the part of the sensor being used.

SuperflyTNT Loc: Manassas VA

Longshadow wrote:

So the sensor resolution does not change, just the resultant image based on the size the image is made to.

You really shouldn’t be using “size” when talking about digital images.

Longshadow Loc: Audubon, PA, United States

SuperflyTNT wrote:

The sensor resolution doesn’t change but if you’re only using part of the sensor the resolution will equal the part of the sensor being used.

I think that means less resolution than the full frame usage would yield when making, lets say, 4x6 from either.

digitalnut Loc: Endwell, NY

Thank You Ricardo00, that is what I wanted to know. I am only using the photos for my InstaGram account so they don’t need to be high rez. I just need to get in closer from the bleachers or sidelines when I am shooting. This will save me a lot of money. No need to buy that 150-600mm lens now.

CHG_CANON Loc: the Windy City

Resolution was / is / will ever be: the pixel dimensions of the image (or sensor).

Page 99 of the D7500 gives the pixel resolution of the D7500 operating in 1.3 crop mode, giving the largest images as 4272x2848 (12MP), down from the 5568x3712 (20MP) of the entire D7200 sensor.

The manual also on page 93 states: Pictures are recorded using a 18.0x12.0mm image area, producing a telephoto effect without the need to change lenses.

Somewhat similar nonsense as the other current UHH thread about 'reach' of a DX camera.