Newbie question on Nikon d750 Dx image area.
Jun 22, 2020 09:46:29 #
GLKTN
Loc: TN
While searching information on my Nikon d750 feature on changing the image area from Fx to Dx, one article, on line said the Dx setting would extend a lens by 1.5 like a Dx camera. It doesn't make sense to me. It just gives a smaller image area, like cropping an image. It would be nice if it made my 500 mm lens a 750mm lens without a 1.5x teleconverter. I cannot find this in the manual so I am not buying it. If it sound too good to be true, it is. I need knowledgeable UHHers to spill the truth. Thanks everyone.
Jun 22, 2020 09:51:04 #
Jun 22, 2020 09:52:35 #
Take the identical scene with each format using the same lens - compare, believe your eyes.
Jun 22, 2020 09:56:24 #
It doesn't change the length of the lens, it changes the angle of view, anyway that's how I understand it.
Jun 22, 2020 09:58:31 #
Your Internet source is the kind Abraham Lincoln would love ...
Nothing about the crop factor makes a lens longer. Worse, when you use the DX crop on your D750, you come away with a 10MP image, see page 118 of your D750 manual.
Although the DX mode on a Nikon full-frame will give you the equivalent field of view of a longer lens, if you want a full 24MP image, you need to use an actual DX-sensor body, not crop smaller image from a full-frame sensor.
Nothing about the crop factor makes a lens longer. Worse, when you use the DX crop on your D750, you come away with a 10MP image, see page 118 of your D750 manual.
Although the DX mode on a Nikon full-frame will give you the equivalent field of view of a longer lens, if you want a full 24MP image, you need to use an actual DX-sensor body, not crop smaller image from a full-frame sensor.
Jun 22, 2020 10:03:11 #
Regardless of format, DX or FX, the resulting image is the same size. The DX sensor area is smaller so what's captured there is "blown up" to be the same size as the FX image. It is not unlike taking a picture with your FX lens in FX mode and cropping the resulting picture, thereby enlarging the image 1 1/2 times. This would be like the DX image. Or so the photography instructor taught us.
Jun 22, 2020 10:08:13 #
I never use the "crop" modes on any of my cameras that offer it... If I need to crop an image for compositional purposes, I'll do it in post...As has been said, the only thing that changes is the "Angle of View" and yes, you lose pixels too...
Jun 22, 2020 10:20:06 #
GLKTN wrote:
While searching information on my Nikon d750 featu... (show quote)
You are correct. It is too good to be true. Plus, it only uses a little more than 1/2 of the pixels on your sensor.
Jun 22, 2020 10:38:40 #
GLKTN
Loc: TN
quixdraw wrote:
Take the identical scene with each format using the same lens - compare, believe your eyes.
Good idea Quixdraw.
Here are three photos with my Nikon d750 and Nikkor 200-500mm lens set at 5.6 and 500mm. Fx, Dx 1.2 and Dx 1.5. I guess I have an Fx and Dx camera body. Who knew?
Jun 22, 2020 10:40:07 #
GLKTN
Loc: TN
CHG_CANON wrote:
Your Internet source is the kind Abraham Lincoln would love ...
Nothing about the crop factor makes a lens longer. Worse, when you use the DX crop on your D750, you come away with a 10MP image, see page 118 of your D750 manual.
Although the DX mode on a Nikon full-frame will give you the equivalent field of view of a longer lens, if you want a full 24MP image, you need to use an actual DX-sensor body, not crop smaller image from a full-frame sensor.
Nothing about the crop factor makes a lens longer. Worse, when you use the DX crop on your D750, you come away with a 10MP image, see page 118 of your D750 manual.
Although the DX mode on a Nikon full-frame will give you the equivalent field of view of a longer lens, if you want a full 24MP image, you need to use an actual DX-sensor body, not crop smaller image from a full-frame sensor.
Thank you. Info. i am looking for.
Jun 22, 2020 10:41:37 #
GLKTN
Loc: TN
GLKTN wrote:
Thank you. Info. i am looking for.
The plus is I get the longer view with the wider aperature instead of losing a full stop of light.
Jun 22, 2020 10:44:57 #
GLKTN wrote:
The plus is I get the longer view with the wider aperture instead of losing a full stop of light.
But, a considerable loss of pixels and having to constrain your image within the parameters in the viewfinder. You would be better off cropping in post. Especially on mobile subjects or if you shoot in RAW and edit the images...
Jun 23, 2020 08:00:01 #
repleo wrote:
You are correct. It is too good to be true. Plus, it only uses a little more than 1/2 of the pixels on your sensor.
Actually less than half of the sensor, about 40%.
Jun 23, 2020 08:04:29 #
GLKTN wrote:
Good idea Quixdraw.
Here are three photos with my Nikon d750 and Nikkor 200-500mm lens set at 5.6 and 500mm. Fx, Dx 1.2 and Dx 1.5. I guess I have an Fx and Dx camera body. Who knew?
Here are three photos with my Nikon d750 and Nikkor 200-500mm lens set at 5.6 and 500mm. Fx, Dx 1.2 and Dx 1.5. I guess I have an Fx and Dx camera body. Who knew?
Really not true. You’re limiting yourself. You could easily crop those yourself in post processing. The only time I wold use DX mode is if I was shooting a DX lens. I’ve never shot a DX lens on my FF because I have an excellent DX camera.
Jun 23, 2020 09:15:57 #
GLKTN
Loc: TN
SuperflyTNT wrote:
Actually less than half of the sensor, about 40%.
More than that. I think you divide pixel count by 2.5.
Steve Perry has an excellent YouTube video explaining this.
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