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Actual Size TIFF of RED shot

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cinemano

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Could anyone post a TIFF of something shot with the RED..?
I did some myself, and im a bit frustrated with sharpness..
Im thinking its because i dont have a RED lens..
(using Nikon lens, but the very same lens on my Nikon camera is capable of much more sharpness) We did backfocus and focus chart etc..
 
sharpness

sharpness

in my experience, the tiff's viewed at 4k will not be super sharp. The OLPF combined with the 3.2K out of 4K way the CMOS/Bayer Pattern process works means that in my projects I don't get that same sharpness at 4k that I would from a digital still camera. At 2k though the image is super sharp and looks great. It's the same thing when you shoot 2k and post 2k it's just not near as good as 4k to 2k footage. Honestly it's not 4096 pixels sharp but it is a huge amount of resolution regardless. At 1080p the resolution difference between 4k downsampled footage and the native footage from my Sony Z1 (super apples and oranges) is extremely night and day noticeable aside from all the other obvious image enhancements. It's not you with SLIGHTLY soft footage (not in a bad way) - it's everybody.
 
test still...

test still...

a 4k tiff is 48MB. Maximum allowed here is 2MB and it has to be a jpeg. So - not ideal, but...

This is a crop of a full frame. The chart filled the the 4K 2:1 frame top to bottom. View at 100% in Photoshop to get an idea of "actual"size.

A friend of mine was having doubts about sharpness with his Nikon's and i sent him this still shot with a red 18-50.

looks good to me!

4568_1223165376.jpg
 
Fuzz is good!

Fuzz is good!

cinemano said:
Could anyone post a TIFF of something shot with the RED..?
I did some myself, and im a bit frustrated with sharpness..
Im thinking its because i dont have a RED lens..
(using Nikon lens, but the very same lens on my Nikon camera is capable of much more sharpness) We did backfocus and focus chart etc..
Click to expand...

You do not want the image computer graphics sharp to the pixel most of the time since you will get aliasing, hence the use of the OLPF to blur the image over 4 pixels to reduce chroma moire and aliasing. If you shoot with a 1920x1080 camera the OLPF makes the blur wider, so it is better to shoot 4K.

If you are going to down-res to DVD size you will want MORE blur since you need the down-res to be able to not skip detail in any pixel, so you may need to add blur if you are going to down res.

For projection at 4K the projection lens would not be much sharper, so if you sharpen the image you mostly just add noise to the projected 4K image, best not to sharpen most of the time.

You can blur to down-res, then sharpen a little, but just a little after the image is at the final resolution...
 
4K 16:9, crop 1:1, Cooke S4 100mm T 2.8/4

4K 16:9 16bit Tiff size is 54MB.

20081005-e9kypsb59k1w2r44axxhp3a7t4.jpg
 
cinemano said:
...but the very same lens on my Nikon camera is capable of much more sharpness) We did backfocus and focus chart etc..
Click to expand...

Digital photos generally require some degree of sharpening, due to the way the pixels are laid out (the exception being the Foveon sensor that the Sigma cameras use). Some digital cameras have automatic sharpening built into them for this reason.

Are you comparing Raw image with Raw image (that is, is the sharpening on your still camera disabled, and are you looking at the Raw)?

Here are a couple of articles on the topic of sharpening digital stills:

Nelson
 
Nelson, Sigma cameras omit the OLPF and hence allow large amounts of aliasing through, adding false detail, sharpness and artifacts...

Graeme
 
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hello.. i dont think my NIkon D80 Sharpens the photos... but the TIFs are very useful thanks.. I guess it is the "film look" then.. looks a little soft to me.. especially the 1:1 chart above.. doesnt look like the average 100% size sharpness to me. Maybe its the nature of the beast. Although the Cooke phone dial Tiff crop looks sharper.. still not razor sharp as in a photo of course.. I guess i got too used to video sharpness?
 
The in-camera conversion and RAW converter software you use on the Nikon will sharpen the image to some degree. The other point, is that aliasing is bad, especially on motion, so we ensure you don't get nasty aliasing artifacts with a nice optical low pass filter.

Graeme
 
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