I'm just learning about hyperfocal distance and have downloaded Nikonian's Depth of Field Calculator. There is a choice for a Nikon DX format camera and a Nikon FX format camera. I know this app was recently updated but I am wondering is the FX format is accurate enough considering the sensor size of the D800? Any views?
Sun 07-Oct-12 10:10 PM | edited Sun 07-Oct-12 10:12 PM by agitater
The D800 FX sensor is the exact same physical size as the D700, D3, D3s, D3x, D4 and D600 sensors. Each sensor offers a different number of megapixels, but that has nothing whatsoever to do with depth of field calculations.
Similarly, the D7000 DX sensor is the exact same physical size as all of the DX sensors ever made for Nikon cameras (D70, D80, D90, D300, D3200, D5100, etc.). Again, the number of megapixels on each DX sensor is different in each DX camera model, but that has nothing whatsoever to do with depth of field calculations.
For an equivalent field of view, the DX sensor camera has at least 1.5x more depth of field than an FX sensor camera, when the focus distance is significantly less than the hyperfocal distance. But the FX camera needs a lens with 1.5x the focal length to give the angle of view of the DX camera.
Use the same prime lens on a DX and an FX camera, and the DX image has 1.5x less depth of field than the FX image, and they would be different images because the angle of view is different.
If you use the same prime lens on a DX and an FX camera, then shoot from different distances so that the angle of view is the same, the DX image will have 1.5x more DOF than the FX image.
Close to the hyperfocal distance, the DX camera has much more than 1.5x the DOF of an FX camera. The hyperfocal distance of the DX camera is 1.5x less than that of an FX camera.
Most of the foregoing is lifted directly from photo.net and the FAQ here on Nikonians.
Shoot tight to avoid cropping in post-processing. It will help preserve the DoF you captured.
I have downloaded and installed three hyperfocal distance calculators to my Verison Droid. I use them all the time while in the field shooting. I especially like DoF Calculator because it lets me enter the camera data once, and it remembers the data every time. It also allows me to use roller-wheel selection of the aperture, focal length and focus distance. It updates the hyperfocal distance automatically as I change the lens data. It also allows you to select TC from 1.4X to 2X.
The only problem is that I sometimes forget and leave the cellphone in the vehicle, and I have to walk back to retrieve it.
There are more than one DoF Calculator applications available. The names are confusing, but they all work. I believe they were free when I downloaded them.
Some still do not have the D800 as a body selection. I just use another FX body as the selection.
Here's a direct link to one of the excellent resource articles here on Nikonians. From there, you'll also find other good articles about a variety of topics. Others may need to purchase a basic Nikonians membership to access the resource pages, but I'm not sure. I've been a member for so long that I've forgotten what's accessible and what's not to non-members.
Back in the day I used to use the focal lines with the f/ number on the lens for DoF. What I've been doing now is to put the lens in manual, focus where I need to, and use the DoF preview button to see the range of acceptable focus I'm looking for.