When using a FX lens, is there any difference in image magnification between setting the shooting menu "Image Area" to a 1.2X or DX setting versus shooting at the normal setting and just cropping the image to the same size in post processing? Will the amount of pixels be the same in either finished image?
Hope I have explained this clearly. Thanks.
#1. "RE: D4 Crop Factor - Image Area" | In response to Reply # 0jpFoto Registered since 25th Jun 2010Wed 08-Aug-12 08:45 PM | edited Wed 08-Aug-12 08:46 PM by jpFoto
After looking at your equipment list, it appears that you have all FX lenses and no DX lenses, so my answer is based upon that assumption.
If you select "Auto DX crop mode" it will have no affect whatsoever when you use your FX lenses. That selection is strictly for using DX lenses on an FX camera body.
The answer to the rest of your question, if I understand it, and I am not sure that I do, is that if you crop an FX image in post processing to the size of a DX image, it will have approximately 43% of the pixels that the full FX image would have had. So, yes it makes no difference. But since you couldn't have used DX Crop Mode with an FX lens, we should change the assumption to a situation where you are using a DX lens on and FX camera. In that case if you chose not to use DX crop mode and then crop it in post, you would end up with the same pixel count as you would have obtained in DX Crop Mode.
Maybe that wasn't your question.
#2. "RE: D4 Crop Factor - Image Area" | In response to Reply # 0briantilley Nikonian since 26th Jan 2003Wed 08-Aug-12 08:58 PM
>Hope I have explained this clearly. Thanks.
Yes, I think it was quite clear
The answer is that using one of the D4's crop modes will produce exactly the same results as using native FX mode and cropping to the same pixel dimensions after shooting. If you know you're going to crop, the in-camera crop mode saves you some memory card space, but you lose the flexibility to crop differently (or not crop at all) afterwards.
#3. "RE: D4 Crop Factor - Image Area" | In response to Reply # 2llevine Nikonian since 09th Jul 2007Wed 08-Aug-12 09:07 PM
Ok, I think I got it. I had been thinking that if I used a FX lens and set a crop factor, it would have magnified my image. Sort of like using a 100mm FX lens and achieving the results of approximately 150mm. The same as putting the 100mm FX lens on a D300.
I guess that is not going happen.
#4. "RE: D4 Crop Factor - Image Area" | In response to Reply # 3ZoneV Nikonian since 07th Jan 2005Thu 09-Aug-12 12:55 AM | edited Thu 09-Aug-12 01:07 AM by ZoneV
>Ok, I think I got it. I had been thinking that if I used a
>FX lens and set a crop factor, it would have magnified my
>image. Sort of like using a 100mm FX lens and achieving the
>results of approximately 150mm. The same as putting the 100mm
>FX lens on a D300.
No. You are stuck with the number of pixels in the DX sensor size. You cannot make new pixels by using the crop mode. The DX frame will always have less pixels than the FX frame when shot on the same camera using the highest resolution. But if the number of pixels in DX mode is enough for you, then you do get a final result that is equivalent to having extra magnification in DX mode.
Example: shoot FX. Resize for web to 800 pixels.
Example 2: Shoot DX. Resize for web to 800 pixels. It's sort of like getting more relative magnification for the output size.
Example 3: shoot FX and crop in post to DX format. Then resize to 800 pixels. Same result as #2.
It's really down to personal preference whether you want to use FX or DX framing mode when shooting with an FX lens. You can use either. But in DX mode, the cropping is permanent.
Basically, these are multi-format cameras. You get to choose your sensor size. But the result is the image will look different.
In conclusion, the DX image (lower resolution, cropped, smaller frame format) has to be magnified more when printing a certain size image. This is where the magnification comes into play...in the printing. So it's not free magnification. You have to sacrfice image quality to get it (less pixels per inch at the given output size)...it's just as if you'd used a camera with a smaller (DX) format sensor. But in the real world, this may be a small, un-noticeable sacrifice in image quality. For all intents and purposes, the extra magnification step (when printing) might come along as a free rider, and no one will ever know. In that case, it's like getting free magnification (sort of)...and the effect would be for all intents and purposes like you said...a 100mm lens acting as a 150mm (in terms of field of view and image size. I hesitate to say "magnification", because "magnification" is acutally a process, not a result of a process).
Nikon user since 2000