SixStringsOutOfTune Posted May 5 Share #1 Posted May 5 Advertisement (gone after registration) Hello!, I recently bought a D-lux8 and there is something rather strange about the DNG files. When I import them to MacOs (Sequoia on a Mac mini m4) either through a card reader or a USB port on the Mac there are two hot pixels always at the same place in the photo. These pixels are visible in both the native picture viewer on the Mac and in Photomator. The color can variate between red and white and even greenish. I cannot find the hot pixel on the screen on the camera. What makes it even more interesting is if I imported the exact same file onto a windows 11 machine the hot pixels are not there. I have tried shooting with different shutter speed and iso etc without the hot pixel going away. It might change color from red to white. Have anyone else experienced the same, or may know the cause of this? Link to post Share on other sites More sharing options...
Advertisement Posted May 5 Posted May 5 Hi SixStringsOutOfTune, Take a look here Hot pixels on MacOS, not on Windows. I'm sure you'll find what you were looking for!
starcolony Posted May 6 Share #2 Posted May 6 (edited) That is really odd behavior. My Olympus cameras have a feature called "Pixel Mapping". Short version, it takes black pic, then maps away any hot pixels. Does Leica offer a similar feature? Good luck (I play ukulele, so only 4 strings out of tune) Edited May 6 by starcolony Link to post Share on other sites More sharing options...
SixStringsOutOfTune Posted May 6 Author Share #3 Posted May 6 It is indeed really odd behaviour. No, the D-lux 8 as far as i can tell does not offer pixel re-mapping. I did check on Macs homepage and the D-lux 8 raw format is not listed as supported. The latest model listed is the D-lux 7. Its strange though, and i might be wrong, but if it was a sensor issue then it should be visible on Windows as well and maybe even the D-lux 8`s own screen. (My ukulele is always out of tune, since i don't play it much.. ) 1 Link to post Share on other sites More sharing options...
jaapv Posted May 6 Share #4 Posted May 6 Leica CS can perform pixel mapping. You have to send the camera in. However, if the camera is not supported by the software you are using you may well be seeing artifacts. Try on your Mac using compatible software. Link to post Share on other sites More sharing options...
Stuart Richardson Posted May 6 Share #5 Posted May 6 (edited) What raw converter are you using? I would not really trust the operating system to read DNGs reliably, particularly from fairly uncommon cameras like a Leica D-lux. They are there more as an auxiliary tool. If the images show up with hot pixels in a dedicated raw converter, I would start wondering what was going on... I don't know Photomator, but my guess is that it is a tool that uses the OS's built in image rendering and raw conversion, so it might just replicate the problem. I would be curious what it looks like in an Adobe program like Lightroom or Photoshop, or in Capture One. I am sure there are free editors as well. I used to use Rawtherapee, but that is a very complicated one. I am not sure what the good free ones are now. Edited May 6 by Stuart Richardson Link to post Share on other sites More sharing options...
Stuart Richardson Posted May 6 Share #6 Posted May 6 Yeah, I just looked it up: "Requires Apple Photos as the media manager and for Raw support; the company has announced future support for opening images from the Finder". So Photomator just uses the OS to do the conversion, so any problem you see in the OS is likely to be replicated in Photomator. 1 Link to post Share on other sites More sharing options...
SixStringsOutOfTune Posted May 6 Author Share #7 Posted May 6 Advertisement (gone after registration) Thank you for chiming in. You are probably right about Photomator using Apple. If I remember correctly Apple even bought the company. I will try another software that not uses Apple later today to see if that helps. Link to post Share on other sites More sharing options...
SixStringsOutOfTune Posted May 6 Author Share #8 Posted May 6 2 hours ago, jaapv said: Leica CS can perform pixel mapping. You have to send the camera in. However, if the camera is not supported by the software you are using you may well be seeing artifacts. Try on your Mac using compatible software. Oke. That’s good to now. I will look into other software as well. Thanks Link to post Share on other sites More sharing options...
mujk Posted May 6 Share #9 Posted May 6 The DNG format actually includes the option to specify a list of bad pixels, so that the raw converter can map them out. The more common method is to map them out in the camera. I have no idea how Leica handles hot pixels in the D-lux8. Link to post Share on other sites More sharing options...
SixStringsOutOfTune Posted May 6 Author Share #10 Posted May 6 4 hours ago, mujk said: The DNG format actually includes the option to specify a list of bad pixels, so that the raw converter can map them out. The more common method is to map them out in the camera. I have no idea how Leica handles hot pixels in the D-lux8. Oke. I did not know that. Interesting. Thank you. Link to post Share on other sites More sharing options...
SixStringsOutOfTune Posted May 6 Author Share #11 Posted May 6 (edited) To give and update on the pixel mystery: I went by the dealership today, and they basically confirmed the same as me by testing on their machines. There are hot pixels on Mac OS and not Windows and the camera screen. They were quite baffled and had never seen this before and did not have a good answer to why. They will do some investigation though. However, as jaapv and Stuart Richardson suggested I have now tried I different software that are using their own RAW converter. The software I have tried is On1 Photo Raw 2025. When opening the same files in that program the pixels errors are gone. This basically confirms in my case that Apples raw converter (included Photomator) are having problems with the DNG files coming out of my D-lux 8. They might need to update for this camera. So, it looks like it's not a camera issue, but more a software issue from Apples side. Thank you all for your help! Edited May 6 by SixStringsOutOfTune 1 1 Link to post Share on other sites More sharing options...
SixStringsOutOfTune Posted May 7 Author Share #12 Posted May 7 Hi Again, I was wrong. There are hot pixels on my camera. Turns out that ON1 just have corrections turned on automatically. Tested on several programs and all show hot pixels at the same spots, and there are five of them. Windows also has a auto enhance function in their photo viewer and its why the hot pixels was not visible. The little annoying part is that all of them are around the center of the screen. I read that hot pixels are quite normal on cameras and most software will fix them. Is 5 hot pixels within "acceptable" amount on a new camera, or should I go back and complain? Link to post Share on other sites More sharing options...
starcolony Posted May 7 Share #13 Posted May 7 My D-Lux 8 is new as well. I just did a 20 second exposure with the lens cap on and long exposure noise reduction turned off. No hot pixels seen on camera screen. I then transferred the pic to my laptop (bigger screen, higher resolution). No hot pixels visible. I would be inclined to return a new cam with 5 hot pixels right out of the gate. Especially considering Leica does not provide an in camera utility to remove hot pixels. Good luck. Link to post Share on other sites More sharing options...
SixStringsOutOfTune Posted May 7 Author Share #14 Posted May 7 13 minutes ago, starcolony said: My D-Lux 8 is new as well. I just did a 20 second exposure with the lens cap on and long exposure noise reduction turned off. No hot pixels seen on camera screen. I then transferred the pic to my laptop (bigger screen, higher resolution). No hot pixels visible. I would be inclined to return a new cam with 5 hot pixels right out of the gate. Especially considering Leica does not provide an in camera utility to remove hot pixels. Good luck. Ok. Thank you. I sent a e-mail to Leica support. Let's see what they say. Link to post Share on other sites More sharing options...
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