A700 color calibration results with ACR Calibrator |
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Shaocaholica ![]() Senior Member ![]() Joined: 14 July 2006 Location: United States Status: Offline Posts: 1881 |
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![]() I went to the local camera store and saw that they had color checker cards in stock for a decent price compared to B&H/Adorama so I picked one up to do a quick test with my A700. You can read all about the process here: www.fors.net/chromoholics Anyway, here are the averaged results I got from 2 different images taken in direct sunlight: Shadow Tint: 0 Red Hue: -25 Red Saturation: +40 Green Hue: -30 Green Saturation: -20 Blue Hue: +11 Blue Saturation: -4 These settings are technically specific to MY A700 but you can try them to see if they work for your A700 as well since the variations in sensors shouldn't be that much...I hope. Just plug them into ACR or LR's calibration section under Develop settings. You can then create a preset in ACR or LR to be reused later. I will post some real world photos tomorrow showing before and after. Reds are more affect than the other 2 colors. |
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nozzle ![]() Senior Member ![]() Joined: 28 October 2005 Status: Offline Posts: 332 |
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Thanks shaocaholica.
That saves me money . ![]() But i will do my own calibration anyway and will report back on my values To mladen: I think it would be great to keep this info on a separate page, as many people may find them usefull. |
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Turerkan ![]() Emeritus group ![]() Moderator emeritus Joined: 11 February 2006 Location: Turkey Status: Offline Posts: 6253 |
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i think this deserves a place in the knowledge base.
i'd love to have the same thing with a 7d or 5d. do you have one shao? |
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kiklop ![]() Admin Group ![]() Dyxum owner Joined: 14 July 2005 Country: Croatia Location: Rovinj Status: Offline Posts: 10564 |
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For those interested .. just few more comments.
- calibration settings are valid for the same (or similar) WB. Unlike most other converters, ACR do use TWO internal profiles for every camera model; a daylight and tungsten WB .. and then it mixes these two to get appropriate color profile - not all cameras are the same; mine a700 may have a bit different color response than yours - there is a lot more technicals behind this and we even have some different scripts available. You can read more http://www.xs4all.nl/~tindeman/raw/color_reproduction.html and download another script at http://www.xs4all.nl/~tindeman/raw/acr-calibrator-l.html or another one at http://www.rags-int-inc.com/PhotoTechStuff/ColorCalibration/ Happy shooting ! Edited by Kiklop - 29 October 2007 at 12:56 |
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Shaocaholica ![]() Senior Member ![]() Joined: 14 July 2006 Location: United States Status: Offline Posts: 1881 |
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Oh forgot to say, these values are an average of 2 similar results taken at 5200 and 5500 degrees so its suitable for daylight only.
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Cekari ![]() Senior Member ![]() Joined: 15 August 2005 Country: Sweden Location: Sweden Status: Offline Posts: 7525 |
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Oops, this was an old one that I seems to have missed, but when I tested the values for bright sunshine pix in PS CS2 and LR it realy made a nice diffrence to most of my pix of that type.
So I wonder Shao, have you done any more calibrations for other conditions like in shade and cloudy etc? would be so nice to have them as well. Please... :-) |
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Images https://www.flickr.com/photos/cekari/sets/ ,
English is a funny language, seldom it spells the words like I do |
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AdamJ ![]() Groupie ![]() Joined: 09 June 2008 Country: United States Location: Naperville, IL Status: Offline Posts: 65 |
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Hi,
I have found that in most cases, when the color target is 'properly lit' and an accurate exposure is made, the calibration values will not vary too much across the color temperature range. Although you can definitely find different calibration values in different lighting, you will generally have a limited range. It is this range that I use to 're-center' my calibration. I use this re-centered calibration for a default under ANY lighting situation, and the adjust from there if I feel it is necessary (very rarely). (Obviously if you enjoy having 3, 4, 6, 8 or more different calibrations you are more then welcome to perform the calibration at each lighting condition. If your going to go that far you should also calibrate at different temperatures because the CMOS sensor will have a different calibration depending on how cold or hot it is! In reality, I don't feel the calibration should need to be adjusted so often, unless it is for creative purposes. Thus the whole reason for this post.) I captured the same color checker in various lighting conditions from deep tungsten at 2700K to a cloudy 6800K. Below are the entire range of values across all lighting conditions: Red Hue: -15 to -23 Red Sat: 20 to 38 Grn Hue: -24 to -47 Grn Sat: -20 to -34 Blu Hue: -2 to 9 Blu Sat: -5 to -17 If I take the 'average' of all the numbers in this range I come up with the following: RH: -22 RS: 30 GH: -32 GS: -25 BH: 4 BS: -8 This calibration is what I use for my new 'default' and I find it works quite well. Obviously your milage may vary, but I just wanted to throw this out there incase people were worried they needed so many different calibrations for all kinds of different lighting conditions... |
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Cekari ![]() Senior Member ![]() Joined: 15 August 2005 Country: Sweden Location: Sweden Status: Offline Posts: 7525 |
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Hi and welcome AdamJ.
Nice contrubution for your 1st post :-) Thanks for your effort, will do use this and see how it works out. |
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Images https://www.flickr.com/photos/cekari/sets/ ,
English is a funny language, seldom it spells the words like I do |
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AdamJ ![]() Groupie ![]() Joined: 09 June 2008 Country: United States Location: Naperville, IL Status: Offline Posts: 65 |
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Thanks Cekari!
I'm new to the A700, but not new to digital photography. I have previously used a Canon 40D, XTi, 5D and a Nikon D300. With the new camera this place looked like the best discussion forums around for the A700. Edited by AdamJ - 09 June 2008 at 16:38 |
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kefkafloyd ![]() Senior Member ![]() Joined: 04 July 2006 Country: United States Location: Massachusetts Status: Offline Posts: 2455 |
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Those values really helped me out, cekari. I had a real issue with reds coming out "wrong" (e.g. Northwest airlines tails, Delta red, etc) and this made them snap right into place.
Fortunately Lightroom makes it easy to use different calibrations, you just have them enabled as presets. But one calibration to rule them all is also good. Thanks! |
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Cekari ![]() Senior Member ![]() Joined: 15 August 2005 Country: Sweden Location: Sweden Status: Offline Posts: 7525 |
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Ok, have done some test on both older and newer a700 shots and I say both Shao's and Adam's work very well for me.
Prefer Shao's in very strong sunlight and Adam's in the others sort of. Thanks for sharing those, and as kefkafloyd said they rely help out. |
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Images https://www.flickr.com/photos/cekari/sets/ ,
English is a funny language, seldom it spells the words like I do |
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pegelli ![]() Admin Group ![]() Dyxum Administrator Joined: 02 June 2007 Country: Belgium Location: Schilde Status: Offline Posts: 35186 |
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Thanks to Shao and Adam for posting these for general use. They're very close to what I determined some time ago for my A700 as well, however I found that especially with red and pink flowers the subtle structure of the petals gets oversaturated and becomes one massive glob of colour (and looks ugly
![]() ![]() Comments/questions welcome, because I still feel my "change" to the calibration result is very ad-hoc and empirical. |
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kiklop ![]() Admin Group ![]() Dyxum owner Joined: 14 July 2005 Country: Croatia Location: Rovinj Status: Offline Posts: 10564 |
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I can only share m own settings with the already mentioned note that this is indeed a camera specific setting any may not work for others (results are quite similar to what Shao has provided)
camera profile 4.4 Shadow Tint: 0 Red Hue: -15 Red Saturation: +35 Green Hue: -15 Green Saturation: -15 Blue Hue: +14 Blue Saturation: -11 It is worth to notice that my saved settings include other sliders as well: exposure: -0.3 blacks: 3 brightness: +11 Contrast: -30 those changes are made to get gray patches (and overall tone distribution) as close as possible to color checker chart since i find these important when preparing my own B%W prints; these changes will however result in flat images that will most likely not suit many :) |
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k994 ![]() Newbie ![]() Joined: 20 April 2008 Location: Hong Kong Status: Offline Posts: 10 |
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When I type in shaocaholica's profile to lightroom, all the red and orange flowers just come alive!!!! Thanks shaocaholica!! Also, does anyone has a profile for tungsten light? |
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