AbbeyPhoto Posted February 10, 2010 Share #1 Posted February 10, 2010 Advertisement (gone after registration) At least that's what a dealer told me today! He was adamant that the only function of lens coding (assuming you shoot DNG) is to provide the lens info in EXIF data and that no processing is carried out to compensate for colour shifts or vignetting or anything else. He claims that all of this processing happens only on JPEG files, so if you shoot DNG there is no benefit in coding lenses. Mind you, he also told me that there is no need for a UVIR filter on the M8 if you shoot DNG (because you can fix the colour cast in Lightroom/C1 etc), which struck me as odd since the point of me phoning the dealer was to order one Is any of this true, or is the dealer just mad? Link to post Share on other sites More sharing options...
Advertisement Posted February 10, 2010 Posted February 10, 2010 Hi AbbeyPhoto, Take a look here Lens coding is a myth and Leica are ripping us off .... I'm sure you'll find what you were looking for!
bill Posted February 10, 2010 Share #2 Posted February 10, 2010 I'd find yourself another dealer if I were you... He didn't happen to be trying to sell you an uncoded lens at the time, did he? Regards, Bill Link to post Share on other sites More sharing options...
sandymc Posted February 10, 2010 Share #3 Posted February 10, 2010 For long lenses, true enough. Although in all cases the vignetting processing for JPEG and DNG is the same. But for wide angle lenses, the fool or knave rule applies. Either seriously ill-informed, or someone with sufficient financial incentive that making blatantly incorrect statements is worthwhile. Sandy Link to post Share on other sites More sharing options...
AbbeyPhoto Posted February 10, 2010 Author Share #4 Posted February 10, 2010 I'd find yourself another dealer if I were you... Funnily enough that's exactly what I did He didn't happen to be trying to sell you an uncoded lens at the time, did he? No, just the filter, he started the rant all by himself. I know the UVIR stuff is nonsense, but what about the DNG processing? The M8 manual is unclear on the subject. Link to post Share on other sites More sharing options...
jaapv Posted February 10, 2010 Share #5 Posted February 10, 2010 The corrections are applied before the DNG is written. It has nothing to do with Jpg at all. that is taken from the same (corrected) data. If you want to see the differences, subscribe to Sean Reid's excellent site. I think it might be a good idea to indicate which dealer this was, making him avoidable. Link to post Share on other sites More sharing options...
rickp13 Posted February 10, 2010 Share #6 Posted February 10, 2010 I know the UVIR stuff is nonsense, the uv/ir filter stuff is not quite nonsense, especially if you're trying to sell a BLACK instead of magenta golf bag on an online auction site rick Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites More sharing options...
matlep Posted February 10, 2010 Share #7 Posted February 10, 2010 Advertisement (gone after registration) I know the UVIR stuff is nonsense, the uv/ir filter stuff is not quite nonsense, especially if you're trying to sell a BLACK instead of magenta golf bag on an online auction site rick I think he was referring to the dealers nonsense of not needing an UV/IR filter. I think we all can agree that UV/IR is an essential piece of hardware for the M8/8.2 Link to post Share on other sites More sharing options...
rickp13 Posted February 10, 2010 Share #8 Posted February 10, 2010 quite right, mat. i should read thoroughly, then post cheers rick Link to post Share on other sites More sharing options...
AbbeyPhoto Posted February 10, 2010 Author Share #9 Posted February 10, 2010 No problem Rick. Nice golf bag, does it also come in black? Link to post Share on other sites More sharing options...
rickp13 Posted February 10, 2010 Share #10 Posted February 10, 2010 sorry, no. just magenta, but it was quite dishy with my purple alligator golf bootlets Link to post Share on other sites More sharing options...
adan Posted February 10, 2010 Share #11 Posted February 10, 2010 It is a common misconception that "RAW" files (including .dngs) do not receive in-camera-processing (with any camera). 10 years ago in the infancy of RAW shooting, that may have been true, but it has not been so for a long time. Today, all kinds of corrections get applied to RAW images before they are written to the card (it varies from one manufacturer to another): noise reduction, vignetting correction, Leica's IR corrections, etc. Heck, Canon even produces "reduced-size" RAW files from the 5D - 10 or 5 Mpixel images from a 21 Mpixel sensor. Since I doubt they are physically swapping out the sensor every time you choose sRAW from the menu - obviously it is being done by processing the image before saving the data in "raw" format. It is true that at or above 35mm or 50mm, depending on subject matter and one's own tolerances - lens coding may have little visible effect on M8 images. But show this dealer dngs shot with a 15mm and IR filter, with and without coding, and I expect he'll change his tune unless he is terminally brain-damaged. Link to post Share on other sites More sharing options...
stunsworth Posted February 10, 2010 Share #12 Posted February 10, 2010 At least that's what a dealer told me today... Find yourself another dealer. He's wrong. Link to post Share on other sites More sharing options...
haroldp Posted February 10, 2010 Share #13 Posted February 10, 2010 I know the UVIR stuff is nonsense, the uv/ir filter stuff is not quite nonsense, especially if you're trying to sell a BLACK instead of magenta golf bag on an online auction site rick In addition, if you use a metz flash in TTL (gnc) mode, you will be 1-2 stops underexposed without the UV/IR cut filter on an M8. IR content of the preflash must be high. Regards ... H Link to post Share on other sites More sharing options...
brianv Posted February 10, 2010 Share #14 Posted February 10, 2010 It is a common misconception that "RAW" files (including .dngs) do not receive in-camera-processing (with any camera). 10 years ago in the infancy of RAW shooting, that may have been true, but it has not been so for a long time. Today, all kinds of corrections get applied to RAW images before they are written to the card (it varies from one manufacturer to another): noise reduction, vignetting correction, Leica's IR corrections, etc. Are you kidding! Back in the 90s', the Digital Camera Raw files still had Sprocket Holes in them to shift the image out! Kodak DCS200, 1993. (Actually, the calibration portion of the CCD got stored, but you had to write your own RAW processor to see them. Mine is in FORTRAN) Link to post Share on other sites More sharing options...
fotografr Posted February 11, 2010 Share #15 Posted February 11, 2010 Say, what happened to the sprocket holes on the bottom? You must have cropped them out. Link to post Share on other sites More sharing options...
Nicoleica Posted February 11, 2010 Share #16 Posted February 11, 2010 Say, what happened to the sprocket holes on the bottom? You must have cropped them out. And here was I thinking that it must be a 126 format sensor. Link to post Share on other sites More sharing options...
fefe Posted February 12, 2010 Share #17 Posted February 12, 2010 Seems your sensor was also quite IR sensitive Link to post Share on other sites More sharing options...
pelagia Posted February 27, 2010 Share #18 Posted February 27, 2010 Please [a reputable M9 user only ] tell me just 'yes' or 'no' Does the setting of lens coding in the camera apply to the info written into DNG file (apart from exif)? Tom Link to post Share on other sites More sharing options...
brianv Posted February 27, 2010 Share #19 Posted February 27, 2010 Seems your sensor was also quite IR sensitive I paid an extra $4,000 to Kodak to leave the IR cut filter off of the sensor. The IR cut filter was integral to the CCD, and they did a custom run of 50 sensors for a limited production of DCS200ir's. It is one of the first "commercial off-the-shelf" Digital SLR cameras that was sensitive to IR. And- I discovered the "Sprockets" when writing my own Raw convertor for the ".KC2" formatted files. Also discovered 12 columns and rows of pixels that the Kodak driver cropped, in addition to the "sprockets". Link to post Share on other sites More sharing options...
doubice Posted February 27, 2010 Share #20 Posted February 27, 2010 Please [a reputable M9 user only ] tell me just 'yes' or 'no' Tom Yes or no. Jan Link to post Share on other sites More sharing options...
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