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D850 Crop Modes


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#1 John W

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Posted 24 October 2017 - 09:29 AM

These are not great wildlife images but I was pushing here to find out what I have. Difficult conditions for any camera. A dark bird, in the shadows, with lots of branches to grab focus and relatively high ISO. All taken from the same 23.7 meters with the same settings and the same quick pp in LR with 0 noise reduction and 0 crop. 1/800, f6.3, auto ISO 2200+-, +1 ev, 1.4III + 500mm f4 E, D850.  I am thinking that for wildlife I may experiment with the 5:4 and 1:2 crop factors. I still get considerably more information than with the D500 but don't have to crop as much and don't have such large files to deal with vs shooting FX and cropping. The 1:2 looks especially promising @ 31.5mp and a 30x20 image area ( think 4 x 6 and  8 x 12 ). In this experiment DX produced the least pleasing image. 

 

FX - 45.4mp      [/url]0262 fx-0262 by John Whaley, on Flickr">http://37182171023_6a4f36c099_b.jpg0262 fx-0262 by John Whaley, on Flickr

 

5:4 - 37.8mp      [/url]0258 5-4-0258 by John Whaley, on Flickr">http://37871039372_3d02c278b6_b.jpg0258 5-4-0258 by John Whaley, on Flickr

 

1:2 - 31.5mp      [/url]0240 1-2-0240 by John Whaley, on Flickr">http://37871040042_a7a89f8eb5_b.jpg0240 1-2-0240 by John Whaley, on Flickr

 

DX - 19.4mp       [/url]0250 dx-0250 by John Whaley, on Flickr">http://37182172673_ab5e184f37_b.jpg0250 dx-0250 by John Whaley, on Flickr



#2 Roderick

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Posted 24 October 2017 - 02:48 PM

Looks like an incredibly versatile camera.



#3 grimlock361

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Posted 24 October 2017 - 03:15 PM

Thoses are some very nice images.  Intersting that the DX is the least pleasing as, pixel for pixel, it should be all the same to your sensor?  To accurately compare the different crop modes you should take the full resolution image and crop it down in post to compare it to the corresponding images take in the various crop modes.  Crop modes on FF cameras are only there for a performance boost at the cost of resolution.  If no boost then I would just shoot full sensor and crop in post.  


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#4 John W

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Posted 24 October 2017 - 04:14 PM



Thoses are some very nice images.  Intersting that the DX is the least pleasing as, pixel for pixel, it should be all the same to your sensor?  To accurately compare the different crop modes you should take the full resolution image and crop it down in post to compare it to the corresponding images take in the various crop modes.  Crop modes on FF cameras are only there for a performance boost at the cost of resolution.  If no boost then I would just shoot full sensor and crop in post.  

I get a considerable boost in the buffer rate and smaller files for the computer to work on. Obviously if I can fill the frame FX will give best IQ but if cropping anyway the smaller files are easier to deal with. This only applies to images that require cropping and for landscape, architecture, ... FX will be the best option. I will try cropping the FX down to 1:2 and see if I can tell a difference in IQ. I spent a little time in pp using noise reduction in PS and cropped the FX to 1:2. I don't see much difference in IQ.

 

FX cropped -   [/url]0262e - FX- by John Whaley, on Flickr">http://37878586412_9ab7ab280b_b.jpg0262e - FX- by John Whaley, on Flickr

 

1:2 ------------  [/url]0240e - 1-2- by John Whaley, on Flickr">http://37199762464_09164fda29_b.jpg0240e - 1-2- by John Whaley, on Flickr






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