On Sun, Sep 28, 2008 at 10:56 AM, Godfrey DiGiorgi <[EMAIL PROTECTED]> wrote: > I would test the theory that the red channel is any different from the > others by shooting a monochrome resolution test chart and then a series of > targets with red green and blue edges. Examine the results and evaluate > whether there is any truth to this alleged red channel deficiency first. > > Another friend is working with the D200 quite a lot ... He does graphically > inspired abstracts with lots of highly colored subjects ... And I have seen > no evidence of unsharpness in his captured images.
See, thats just it. For the most part, static images like a head shot or a flower etc, are ok, in my opinion. Its just the action, jumping shots that are less than stellar, and i cannot figure out why. I sent a few samples to Daev S. some from the D1H and some from the D200, using same lenses and same subjects, same weather and settings. I felt the action ones were very soft, Dave thought they all looked ok, the D1 stuff had more saturation he thought, and thus looked sharper. I am trying the various modes in the D200, Vivid, custom etc, and am trying to see id there is a difference using them,. I shot some stuff i'll post soon, and maybe that might tell. Thanks for all the help in this, i know i'm a pain. Dave > > Godfrey - www.gdgphoto.com > > On Sep 28, 2008, at 6:08 AM, David J Brooks <[EMAIL PROTECTED]> wrote: > >> On Sat, Sep 27, 2008 at 10:36 PM, Derby Chang <[EMAIL PROTECTED]> wrote: >>> >>> I know you understand what I mean. Dave asked why his red channel looked >>> soft. I meant that looking at just one channel after demosaicing was not >>> looking at the full resolution of the sensor >> >> It was mentioned to me on my Nikon BB, that the red channel in the >> D200 "seems" to be a factor in the preceived softness on the D200 >> images i get. It was also suggested to go in and sharpen just that >> channel, but i see no difference to that channel when i do it, and yes >> looks pretty soft.Although in a horse photo, red would be the major >> colour, would it not. >> >> I'm just trying to find a work around, instead of trying the D300 or >> D700, both of which have much better sharpness ratings, or lets say, >> less complqaints.:-) >> >> Dave >> >> >> >> >>> >>> I humbly apologise to your Holiness I was not clear. >>> >>> D >>> >>> >>> Godfrey DiGiorgi wrote: >>>> >>>> Then I don't understand your sentence below. Dave is looking at >>>> individual >>>> channels in RGB which, as you say, will be softer than the full three >>>> channel composite. >>>> >>>> At this point in the process, Bayer demosaicing and gamma interpolation >>>> happened long ago ... >>>> >>>> So what does "The Bayer demosaicing will then be trying to interpolate >>>> from what information it has" have to do with the fact stated above? >>>> >>>> G >>>> >>>> >>>> >>>> On Sep 27, 2008, at 5:45 PM, Derby Chang wrote: >>>> >>>>> >>>>> Yes, that's my point. If you are looking at a predominantly green >>>>> image, >>>>> the detail is in the green. Looking at the red channel means you are >>>>> looking >>>>> at rather less resolution than the full RGB image >>>>> >>>>> D >>>>> >>>>> >>>>> >>>>> Godfrey DiGiorgi wrote: >>>>>> >>>>>> When you're looking at an RGB channel file in Photoshop, the Bayer >>>>>> demosaicing is long past. >>>>>> >>>>>> Godfrey >>>>>> >>>>>> On Sep 27, 2008, at 4:37 PM, Derby Chang wrote: >>>>>> >>>>>>> >>>>>>> Don't forget, Dave, individual channels will be "softer" than the >>>>>>> full >>>>>>> RGB image, especially if you are looking in one channel and the most >>>>>>> of the >>>>>>> colours are in the other two. The Bayer demosaicing will then be >>>>>>> trying to >>>>>>> interpolate from what information it has. >>>>>>> >>>>>>> D >>>>>>> >>>>>>> >>>>>>> David J Brooks wrote: >>>>>>>> >>>>>>>> Good, its not my eyes.:-) >>>>>>>> >>>>>>>> I tried adjusting sharpness on that channel but did not see any >>>>>>>> change. I;'m sure i;m doing something wrong, or, the photos from the >>>>>>>> D200 ARE really soft. >>>>>>>> >>>> >>>> -- >>>> PDML Pentax-Discuss Mail List >>>> [email protected] >>>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >>>> follow the directions. >>>> >>> >>> >>> -- >>> >>> [EMAIL PROTECTED] >>> http://members.iinet.net.au/~derbyc >>> >>> -- >>> PDML Pentax-Discuss Mail List >>> [email protected] >>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >>> follow the directions. >>> >> >> >> >> -- >> Equine Photography >> www.caughtinmotion.com >> http://brooksinthecountry.blogspot.com/ >> Ontario Canada >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. > -- Equine Photography www.caughtinmotion.com http://brooksinthecountry.blogspot.com/ Ontario Canada -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
