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 91 
 on: Today at 03:49:45 AM 
Started by fineartprint-downunder - Last post by BartvanderWolf
No interpolated colour can be better than "perfect true colour" ...can it?

Nobody claimed that a Bayer CFA image is 'better' than a micro-step (or a color-wheel with a monochrome sensor) capture.

Tri-chromatic (R/G/B) color capture is still a relatively rough approximation of the full visible spectrum reflectance ...
In that sense, even micro-step sensor capture is also 'interpolated' color, although more predictable than from a single Bayer CFA. It does require extremely constant continuous lighting, where temperature and long exposure time are enemies of delicate artwork.

Of course, although it produces a more involved workflow, stitching with down-sampling can produce even better results. For recurring jobs, it will pay off to use a contraption like Ted describes here. One of the immediate benefits is the higher level of control over the lighting of the artwork, because only a part of the image needs to be lit and lighting angles are constant for that relatively small area of the total surface.

Cheers,
Bart

 92 
 on: Today at 03:44:24 AM 
Started by KMRennie - Last post by Chairman Bill
I struggled with grey snow for some time. The trick is to get it white, without losing the texture detail. Number 3, though I've seen a thousand shots of that tree, is a lovely composition, with some great detail to be brought out as you lighten & whiten that snow.

 93 
 on: Today at 03:28:26 AM 
Started by fineartprint-downunder - Last post by torger
More on single vs multishot using a bit older gear:

http://www.luminous-landscape.com/images-103/Figure-2-full.jpg

From the review http://www.luminous-landscape.com/reviews/cameras/h3d50ii.shtml

http://www.luminous-landscape.com/reviews/cameras/h3d50ii.shtml

However that review also points out Quote "Based on the color “blotchiness” and the lack of resolution in single shot mode, I would not consider using this camera in anything other than Multishot mode. I hardly need to say this, but the PhaseOne System [P65+] is far superior to the H3D 50 II in single shot mode, as it never shows any “blotchiness” and has much higher resolution." End quote.

A comment on that is as the P65+ has microlenses it should show a bit less aliasing (samples more of the 6x6um square), but I would suggest that the difference seen there is more due to luck than other, as moire can disappear with slight defocusing, and perhaps Phase One bias, suggested by that 60 megapixels is considered "much higher resolution" than 50... Mark Dubovoy has had some strange things to say about dynamic range too so I would not take his words in that review too seriously.

 94 
 on: Today at 03:26:12 AM 
Started by Alun - Last post by Alun
It is a part of a larger test image but I have cut out the relevant area.

This is the link to it on my Google Drive - https://drive.google.com/file/d/0B0VvPaunRJKwb0VOajNDb3ktb0k/view?usp=sharing

Print on your choice of paper with the relevant ICC profile. Assess which numbers you can see before they disappear and set the C1 picker preferences to these numbers.

Any questions, let me know

 95 
 on: Today at 03:12:39 AM 
Started by fineartprint-downunder - Last post by Theodoros
I could see a case where one could argue either is better but out of the box for paintings and stuff, the Leaf and C1 is appears to be better match to original than the CF 528 and Phocus in Reproduction mode, but there are noticeable differences in color between the two set ups. But when you make your own profiles they get much closer. 

I don't see how can one use "out of the box" colour profiling for paintings Erik... It's a part of the job to achieve perfect profile calibration and 528c is perfect when you do... No interpolated colour can be better than "perfect true colour" ...can it?

 96 
 on: Today at 03:09:50 AM 
Started by fineartprint-downunder - Last post by torger
Yes single-shot is a great workflow advantage, that's one major reason I think people use them when it's become "good enough", and now 135 systems are good enough for some applications which can be a further workflow improvement although that is more debatable.

Concerning color on large fields the single-shot should not be worse than the multishot as the single-shot get sufficient sampling. But in pixelpeep the multishot has a clear advantage, especially if it's moving sub-pixel. Bayer singleshot demosacing is in fact a lot of guesswork, it's about making a pleasing and quite likely result, accuracy is not possible to achieve.

Here's a nice comparison between single shot 80 megapixels and 4-shot(?) 50 megapixel. Note that Hassy also have the 200MS version which is 6-shot subpixel. Now Hassy bases their multishot cameras on the CMOS sensor and the lower noise of that should further improve the multi-shot quality. I recently saw a H4D-50MS on ebay for £10k by the way.

https://captureintegration.com/leaf-aptus-ii-12-hasselblad-4d-50ms/

The worst problem as I see it with the single shot is that they create detail that's not there and false color on fine structured details. You can see it in this example crop, quite subtle but the grey textile has some colors in it in the single-shot which is not there in the real object, and the multishot captures that correctly. You can also see that the magenta color area does not match either but I don't know the reason for that.

https://captureintegration.com/wp-content/uploads/2013/04/Screen-Shot-2013-04-15-at-4.14.37-PM.png

 97 
 on: Today at 03:00:12 AM 
Started by mal mcilwraith - Last post by mal mcilwraith
Well who does this remind you of?



Remarkable Rocks, Kangaroo Island, South Australia.


Mal

 98 
 on: Today at 02:55:38 AM 
Started by fineartprint-downunder - Last post by Theodoros
Obviously, if you have friends in a well-funded museum who are ready to pay you $1000 per image to do an exhibition catalogue, the price of equipment is not going to be an issue Smiley

Edmund

Edmund

1000 per capture Edmund? Are you sure?  Shocked That means if one does 20 paintings ...a 20K day income?  Roll Eyes  Where is this museum? Can you send me an address of it?  Cheesy

 99 
 on: Today at 02:54:11 AM 
Started by MattNQ - Last post by mal mcilwraith
Matt

Well consistent if not original.

Mal

 100 
 on: Today at 02:18:55 AM 
Started by thierrylegros396 - Last post by Manoli
An absolute pain to install. Mac version produced error message before even recognising camera (RX100) ...

On Yosemite you first need to download and run DL100_1411.dmg, then update DSCRX100M2V110.dmg.
Works fine.


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