californiajay Posted March 14, 2007 Share #1 Posted March 14, 2007 Advertisement (gone after registration) Those of you using the M8 with B&W 486 filters, are you post processing to get rid of the green cast that the filter produces or is something wrong with mine as far as white balance is concerned in JPG files? I am finding that the camera will produce good color without the filter, but once I put it on, the result is unacceptable, way too green. I do have firmware 1.092. Link to post Share on other sites More sharing options...
Advertisement Posted March 14, 2007 Posted March 14, 2007 Hi californiajay, Take a look here Green color cast with B&W 486 filter. I'm sure you'll find what you were looking for!
blakley Posted March 14, 2007 Share #2 Posted March 14, 2007 If you take a look at the sticky at the top of this forum, you can find various profiles which will improve the RAW processing of your M8 to achieve better colors. The best solution, though, will be to wait about a month for firmware version 1.10 which promises to deliver accurate color with filters, and which should also presumably deliver "best possible" color without filters, taking into account the inevitable inaccuracy introduced by IR contamination where it occurs. Link to post Share on other sites More sharing options...
californiajay Posted March 14, 2007 Author Share #3 Posted March 14, 2007 Ahh thanks. I thought the profiles in the sticky only dealt with the magenta cast when not using the filters. I will take another look. I also wanted some confirmation that the green cast was something that everyone using the filters was getting and it was not something wrong with mine. Thanks again Link to post Share on other sites More sharing options...
blakley Posted March 14, 2007 Share #4 Posted March 14, 2007 It's still possible that your unit has a defect; can you post a shot to illustrate the effect you're seeing? Something with white subjects shot in sunlight with daylight white balance with & without filters would make it easy for others on the forum to judge if you're seeing something different from the rest of us. But do check out the profiles! Link to post Share on other sites More sharing options...
carstenw Posted March 14, 2007 Share #5 Posted March 14, 2007 I don't get a green cast, and I am not sure what you mean. Do you mean the cyan colour shift in the corners of a wide-angle lens? Link to post Share on other sites More sharing options...
tashley Posted March 14, 2007 Share #6 Posted March 14, 2007 I don't get a green cast, and I am not sure what you mean. Do you mean the cyan colour shift in the corners of a wide-angle lens? Ditto. The only green cast I get is cyan shift on filtered lenses of 24mm and wider. Otherwise no impact on colour balance from the filters at all, other than removing the magentas... Tim Link to post Share on other sites More sharing options...
Guest magyarman Posted March 14, 2007 Share #7 Posted March 14, 2007 Advertisement (gone after registration) If Leica make exchange to WB so take away some magenta if is no filter, this mast be go to grin side. So, than if put filter what take away IR, will be grin colour. Oba this suppose be easy fix up, just need go back to red side. Can be profile, ora can be make it action for Photoshop what can make to every file. Wait for 1,10 only good if you got all lenses with 6bit. Link to post Share on other sites More sharing options...
arthury Posted March 14, 2007 Share #8 Posted March 14, 2007 No green cast for me on my M8, firmware 1.092, B+W 486 ir-cut. If I set WB=Daylight, it's a tad warmer but AWB gave me something cooler indoors. The colors for me are just right and absolutely natural and super attractive to my eyes. Furthermore, owing to the absences of IR light, the images are very sharp and has the same usual Leica contrast that I am used to. For me, the IR filters have brought back the life & the beauty of what Leica lenses can achieve in image making. Link to post Share on other sites More sharing options...
californiajay Posted March 15, 2007 Author Share #9 Posted March 15, 2007 Ok, I have only done a few shots indoors with tungsten light. I just tried it out when I got my IR filter in the mail the other day. I want to try a better test outside to see what happens before I post anything, but what I did see was a shift to green across the entire frame, not just the corners. The best way to describe it, is that it looked like an uncorrected shot done under flourescent light instead of tungsten. I was shooting with the 28 summicron. When I took the filter off, the color was perfect. There is a noticable green cast on the filter that I can see by eye, so it actually does not surprise me, but I was wondering whether everyone else was getting this as well and just post processing it until the new firmware shows up next month. Frankly, I have seen the green cast in the corners on shots posted on the internet, but I don't really quite understand this. The entire filter has a greenish tint, the 1.092 firmware and coaded lenses take away most of the vignetting, so why should only the corners turn out green? Can someone with a B&W 486 try some shots under tungsten light and see if that does produce excessive green across the entire image? Thanks Link to post Share on other sites More sharing options...
californiajay Posted March 15, 2007 Author Share #10 Posted March 15, 2007 Update: I just tried the same thing under the same tungsten lighting, setting the camera's white balance first on tungsten (got the green cast with the filter in place) and then with the camera's white balance set to 'auto' and the result while still a tad green was much better. I then repeated the same test under flourescent light ( I would have done daylight but it's dark outside right now) and I got almost the opposite...under 'flourescent' white balance the filter and non filter shots were identical, while under 'auto' white balance the filtered shot this time came out too yellow, the unfiltered one came out looking exactly like the ones I had done under 'flourescent' white balance. Very strange...tomorrow I will try daylight. Link to post Share on other sites More sharing options...
californiajay Posted March 15, 2007 Author Share #11 Posted March 15, 2007 OK here is an image with the filter in place. This is done with white balance set to tungsten. The wall is neutral white. 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 Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/18761-green-color-cast-with-bw-486-filter/?do=findComment&comment=201444'>More sharing options...
californiajay Posted March 15, 2007 Author Share #12 Posted March 15, 2007 OK here is the second, without the filter. Neither one is perfect but the green cast in the filtered one is obvious. 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 Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/18761-green-color-cast-with-bw-486-filter/?do=findComment&comment=201447'>More sharing options...
eronald Posted March 15, 2007 Share #13 Posted March 15, 2007 OK here is the second, without the filter. Neither one is perfect but the green cast in the filtered one is obvious. [ATTACH]29652[/ATTACH] Email me for my latest C1 profiles Apply the profile and white balance on the white around the picture in th photo abov, taken with the filter. edmundronald at gmail dot com Edmund Link to post Share on other sites More sharing options...
californiajay Posted March 15, 2007 Author Share #14 Posted March 15, 2007 Will do Edmund, but tell me..is what I am getting, typical? Link to post Share on other sites More sharing options...
californiajay Posted March 15, 2007 Author Share #15 Posted March 15, 2007 Just one more followup: I did a few more shots tonight, this time with both manual WB and by dialing in the actual color temperature (I do have a color temp. meter) and this time the filtered image actually gave me better results than the non filtered ones which had some of the infamous magenta cast in them. I did see a bit of the cyan color in the corners, but I fully expected to see that, and frankly it was a very small amount. This makes me feel better, as I apparently was a little hasty to get worried about my results using only the automatic WB settings on the camera rather than the more accurate manual ones. Makes a good case for using manual settings!! Link to post Share on other sites More sharing options...
eronald Posted March 15, 2007 Share #16 Posted March 15, 2007 Auto WB on M8 is not the best, altho much better with latest firmware. Edmund Just one more followup: I did a few more shots tonight, this time with both manual WB and by dialing in the actual color temperature (I do have a color temp. meter) and this time the filtered image actually gave me better results than the non filtered ones which had some of the infamous magenta cast in them. I did see a bit of the cyan color in the corners, but I fully expected to see that, and frankly it was a very small amount. This makes me feel better, as I apparently was a little hasty to get worried about my results using only the automatic WB settings on the camera rather than the more accurate manual ones. Makes a good case for using manual settings!! Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted March 15, 2007 Share #17 Posted March 15, 2007 You have a weird situation here too the shade or glass around the light itself is throwing off a cast . I bet it looks more like this to your eye 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 Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/18761-green-color-cast-with-bw-486-filter/?do=findComment&comment=201511'>More sharing options...
californiajay Posted March 16, 2007 Author Share #18 Posted March 16, 2007 Hmm, actually that's a little too blue Guy. The one I did without the filter looks better to be honest. The ones I did later with manual WB are actually very good. By the way, it's not a shade or glass around the light casting the shadow, the light itself is sunken into the ceiling so its fixture throws the shadow. I am really not worried about it anymore. As long as I can tell the camera the color temperature of the scene by dialing it in, and it works, I am happy. I don't mind doing that as I feel more confident in doing it that way anyway. I think I was just too hasty last night in being concerned when I saw an auto setting not work to my liking. I should know better Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted March 16, 2007 Share #19 Posted March 16, 2007 With all that is going on that is very normal right now. Link to post Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.