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Nikon D70 colour problems
The British Journal reported problems with the D70 rendering purple hues
accurately recently. Today a horocultural photographer I deal with (Ian Gowland, almost entirely shoots with Fuji and they use a lot of his pix as samples for reps) told me - very much secondhand info this - that a contact of his at Jessop, in talking about colour repro, said they had been getting D70s returned (3 units to date) because of problems with purples, and problems with saturated reds. I assume he was talking about the same field of work - flower and plant photography. The average user would presumably be happy with the normal colour rendering of the D70. I've not yet used ANY digital camera which really handles sunlit saturated red flowers especially well. Any feedback on this for others - users? David |
#2
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Nikon D70 colour problems
David Kilpatrick wrote:
The British Journal reported problems with the D70 rendering purple hues accurately recently. Today a horocultural photographer I deal with (Ian Gowland, almost entirely shoots with Fuji and they use a lot of his pix as samples for reps) told me - very much secondhand info this - that a contact of his at Jessop, in talking about colour repro, said they had been getting D70s returned (3 units to date) because of problems with purples, and problems with saturated reds. I assume he was talking about the same field of work - flower and plant photography. The average user would presumably be happy with the normal colour rendering of the D70. I've not yet used ANY digital camera which really handles sunlit saturated red flowers especially well. Any feedback on this for others - users? David This is a well known feature of all digital sensors and is easily handled my simply underexposing to ensure that the red channel is not saturated. You can use the histogram to assist with that, although note that this shows luminance data not individual r,g,b data, so you have to learn by experience how much to underexpose. Not really an issue and certainly nothing worth returning the camera for. The issue with purple hues (on flowers) is because of the gamut supported by digital cameras (see http://www.bergencountycamera.com/le...tal_gamut.html). This is again a common issue with digital sensors and nothing specific to the D70. You can adjust for this in Photoshop. Incidentally, this is also an issue with film - see http://www.photo.net/bboard/q-and-a-...?msg_id=003WuH for instance. If the staff in Jessops actually knew anything about photography I'm sure they wouldn't be accepting returns in the basis of these observations. Paul |
#3
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Nikon D70 colour problems
"David Kilpatrick" wrote in message
... [] I've not yet used ANY digital camera which really handles sunlit saturated red flowers especially well. Any feedback on this for others - users? David I've seen substantial colour differences, although on purple fabrics IIRC. My guess is that the differences are caused by extended spectral response of the camera at the red or blue end of the spectrum compared to the eye. Would this perhaps be what you are seeing? Cheers, David |
#4
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Nikon D70 colour problems
In article , iconmags3
@btconnect.com says... I've not yet used ANY digital camera which really handles sunlit saturated red flowers especially well. Any feedback on this for others - users? I find shooting switching to Adobe RGB useful for those shots. I have one picture of a red rose taken at high noon during the summer. When I first converted the .RAW file, I used sRGB as it tends to work better with my printer. I found the reds too saturated on the screen and, of course, on the print. I did a second round using the Adobe RGB color space and had much better results. |
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Nikon D70 colour problems
David Kilpatrick wrote: The British Journal reported problems with the D70 rendering purple hues accurately recently. Today a horocultural photographer sorry guys - gawd knows where that typo came from - horticultural... |
#6
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Nikon D70 colour problems
looks mair like a Freudian slip ti me DK
have yi seen thone fotis abuv? ah posted sum links masel an ahm wundering if thir digital or filum based aniwye - ah mite hiv ti cawe on yir eksperteez soon das B "David Kilpatrick" wrote in message ... David Kilpatrick wrote: The British Journal reported problems with the D70 rendering purple hues accurately recently. Today a horocultural photographer sorry guys - gawd knows where that typo came from - horticultural... |
#7
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Nikon D70 colour problems
David Kilpatrick wrote:
The British Journal reported problems with the D70 rendering purple hues accurately recently. Today a horocultural photographer I deal with (Ian Gowland, almost entirely shoots with Fuji and they use a lot of his pix as samples for reps) told me - very much secondhand info this - that a contact of his at Jessop, in talking about colour repro, said they had been getting D70s returned (3 units to date) because of problems with purples, and problems with saturated reds. I wonder. I suspect the real problem is at the point where the sensor data is rendered into a standard colour space. If done internally in the camera, there is very little control over how the rendering is done. However, if a suitably large space is chosen at the point of raw conversion there shouldn't be any problems. That doesn't mean it will be possible to print (or even display) the resulting image. I assume he was talking about the same field of work - flower and plant photography. The average user would presumably be happy with the normal colour rendering of the D70. I've not yet used ANY digital camera which really handles sunlit saturated red flowers especially well. It's possible that there really is a problem with the camera, but my money would be on the lack of a properly colour managed workflow or the wrong choice of colour space. To investigate this properly requires a measurement of the colour spectrum of the light and the colour spectrum of the flower. This isn't very hard to do and doesn't require particularly exotic equipment. Andrew. |
#8
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Nikon D70 colour problems
David Kilpatrick wrote:
The British Journal reported problems with the D70 rendering purple hues accurately recently. Today a horocultural photographer I deal with (Ian Gowland, almost entirely shoots with Fuji and they use a lot of his pix as samples for reps) told me - very much secondhand info this - that a contact of his at Jessop, in talking about colour repro, said they had been getting D70s returned (3 units to date) because of problems with purples, and problems with saturated reds. I wonder. I suspect the real problem is at the point where the sensor data is rendered into a standard colour space. If done internally in the camera, there is very little control over how the rendering is done. However, if a suitably large space is chosen at the point of raw conversion there shouldn't be any problems. That doesn't mean it will be possible to print (or even display) the resulting image. I assume he was talking about the same field of work - flower and plant photography. The average user would presumably be happy with the normal colour rendering of the D70. I've not yet used ANY digital camera which really handles sunlit saturated red flowers especially well. It's possible that there really is a problem with the camera, but my money would be on the lack of a properly colour managed workflow or the wrong choice of colour space. To investigate this properly requires a measurement of the colour spectrum of the light and the colour spectrum of the flower. This isn't very hard to do and doesn't require particularly exotic equipment. Andrew. |
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