algrove Posted January 14, 2013 Share #81 Posted January 14, 2013 Advertisement (gone after registration) Jamie- Orange filter on my 90AA and MM camera. 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! Now that I see the Jpeg here it prints WAY better. I have not gone over 24x36 inches, but it could easily be double that and render beautifully. Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! Now that I see the Jpeg here it prints WAY better. I have not gone over 24x36 inches, but it could easily be double that and render beautifully. ' data-webShareUrl='https://www.l-camera-forum.com/topic/195739-monochrom-filter-discussion/?do=findComment&comment=2215132'>More sharing options...
Advertisement Posted January 14, 2013 Posted January 14, 2013 Hi algrove, Take a look here Monochrom filter discussion. I'm sure you'll find what you were looking for!
jaapv Posted January 14, 2013 Author Share #82 Posted January 14, 2013 Jamie, skin - a fascinating photographic subject . I could find very few technical references, yet your remarks set me thinking. If we consider the anatomy of skin in as far as it is relevant to photographic rendering we find a layered structure. A fatty base layer, opaque yellowish white, then a layer of capillary veins red to blueish, depending on oxygen saturation and with a density depending on the distribution of veins and arteries. Highly IR reflective. Then Melanin particles which are visible light absorbent, UV reflective and providing toning from Finnish nothing to the blackes African skin, covered by a translucent white layer. This means a large amount of metamerism and a virtually impossible exact rendering. So I can quite understand the need to use tweaking of the color channels to approach a natural-looking effect. Just my thoughts - feel free to shoot holes in them. Link to post Share on other sites More sharing options...
GMB Posted January 15, 2013 Share #83 Posted January 15, 2013 This is an interesting debate on the skin tones in particular, and on the rendering of the MM in general. I only wished it would be illustrated with actual photos. For somone like myself who is not so versed in B&W (and has little of none B&W film background) this would help a lot. As they say: A picture is woth a 1000 words. In particular, if one discusses photography. Link to post Share on other sites More sharing options...
jbl Posted January 15, 2013 Share #84 Posted January 15, 2013 Jamie- Orange filter on my 90AA and MM camera. [ATTACH]355959[/ATTACH] Now that I see the Jpeg here it prints WAY better. I have not gone over 24x36 inches, but it could easily be double that and render beautifully. Great shot. How much PP did you do? Or what altitude are you at? The sky is darker than I ever got with orange filters on film, but I live at sea level. -jbl Link to post Share on other sites More sharing options...
otto.f Posted January 15, 2013 Share #85 Posted January 15, 2013 The KR1,5 filter is way too weak to attain a desired effect on skintones. Did someone try the M8 UV/IR filter on the MM? Link to post Share on other sites More sharing options...
jaapv Posted January 16, 2013 Author Share #86 Posted January 16, 2013 I must admit it did not enter my mind. Possibly it might produce a minuscule increase in sharpness and a minimal darkening of shadows if IR light is present. But most likely the effect would be undetectable, I think. Link to post Share on other sites More sharing options...
otto.f Posted January 16, 2013 Share #87 Posted January 16, 2013 Advertisement (gone after registration) I sold all my UV/IR filters. So if someone could report on that I'd be happy Btw an Orange filter gives a little backfocus, so for portraits it would be wise to focus on the nose to get the eye sharp. See LFI January 2013. Link to post Share on other sites More sharing options...
jaapv Posted January 16, 2013 Author Share #88 Posted January 16, 2013 That is correct, but the amount of chromatic focus shift depends on the chromatic aberrations of the lens and will vary with each lens design. An APO lens will not do this. Link to post Share on other sites More sharing options...
michali Posted January 16, 2013 Share #89 Posted January 16, 2013 This is an interesting debate on the skin tones in particular, and on the rendering of the MM in general. I only wished it would be illustrated with actual photos. For somone like myself who is not so versed in B&W (and has little of none B&W film background) this would help a lot. As they say: A picture is woth a 1000 words. In particular, if one discusses photography. One of my first shots taken within 1/2 an hour of picking up my Monochrom, with 50mm Summilux @ f1.4. No filter. I'll post some more people shots later today. 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/195739-monochrom-filter-discussion/?do=findComment&comment=2216263'>More sharing options...
rickp13 Posted January 17, 2013 Share #90 Posted January 17, 2013 death valley???? wherever, it's a beautiful location. cheers rick Jamie- Orange filter on my 90AA and MM camera. [ATTACH]355959[/ATTACH] Now that I see the Jpeg here it prints WAY better. I have not gone over 24x36 inches, but it could easily be double that and render beautifully. Link to post Share on other sites More sharing options...
Nick_S Posted January 18, 2013 Share #91 Posted January 18, 2013 I thought I would ask for any views on B+W MRC versus Heliopan filters in the present context?, e.g., current availability, usability across a range of lenses (mine are e39 filter thread). I own a few made by both manufacturers from some past cameras and the B+W seem to have a more reassuring build quality, but are there any Leica lenses for which their current F-Pro mounts don't work due to the thickness of the mount (vignetting, fitting lens hood, etc.)? Nick Link to post Share on other sites More sharing options...
jaapv Posted January 18, 2013 Author Share #92 Posted January 18, 2013 I find no quality difference between the two.The product range is similar too. B&W seems to be more readily available, Heliopan has a more sizes. Link to post Share on other sites More sharing options...
algrove Posted January 18, 2013 Share #93 Posted January 18, 2013 Great shot. How much PP did you do? Or what altitude are you at? The sky is darker than I ever got with orange filters on film, but I live at sea level. -jbl Thanks. I basically only tweak exposure and any clipping in LR. Then I take over to SEFEX and use preset #005 and then seldom adjust beyond that. Sometimes after printing I might go back to give more structure. That's all. That was just after sunrise and waited for some luminance on most of the hills/mountains. That was at maybe 4000 feet. Don't know as I was traveling during that shot. Link to post Share on other sites More sharing options...
MichaelRabern Posted January 19, 2013 Share #94 Posted January 19, 2013 That is correct, but the amount of chromatic focus shift depends on the chromatic aberrations of the lens and will vary with each lens design. An APO lens will not do this. I am stumped. Could you direct me where I will learn more about this focus phenomenon? Link to post Share on other sites More sharing options...
otto.f Posted January 19, 2013 Share #95 Posted January 19, 2013 As I said Leica Fotografie International, magazine, January 2013 Link to post Share on other sites More sharing options...
jaapv Posted January 19, 2013 Author Share #96 Posted January 19, 2013 I am stumped. Could you direct me where I will learn more about this focus phenomenon? It is very simple: A lens with longitudinal chromatic aberration (i.e. any non-apo lens) will focus red light in a different plane from green and blue light. If you use monochromatic light, like you do when using color filters, the focus plane will appear shifted. It is seen in its most extreme form with IR and UV pass filters.Find a nice diagram of LCA here Link to post Share on other sites More sharing options...
jbl Posted January 19, 2013 Share #97 Posted January 19, 2013 It is very simple: A lens with longitudinal chromatic aberration (i.e. any non-apo lens) will focus red light in a different plane from green and blue light. If you use monochromatic light, like you do when using color filters, the focus plane will appear shifted. It is seen in its most extreme form with IR and UV pass filters.Find a nice diagram of LCA here Right. That's why a lot of Canon lenses of that IR focusing point. -jbl Link to post Share on other sites More sharing options...
MichaelRabern Posted January 19, 2013 Share #98 Posted January 19, 2013 It is very simple: A lens with longitudinal chromatic aberration (i.e. any non-apo lens) will focus red light in a different plane from green and blue light. If you use monochromatic light, like you do when using color filters, the focus plane will appear shifted. It is seen in its most extreme form with IR and UV pass filters.Find a nice diagram of LCA here This makes perfect sense. I appreciate the post. (Otto- I will see to the LFI article, once it arrives.) Link to post Share on other sites More sharing options...
jaapv Posted January 20, 2013 Author Share #99 Posted January 20, 2013 The B+W filter carriers are quite practical. 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/195739-monochrom-filter-discussion/?do=findComment&comment=2220110'>More sharing options...
Nick_S Posted January 22, 2013 Share #100 Posted January 22, 2013 I find no quality difference between the two.The product range is similar too. B&W seems to be more readily available, Heliopan has a more sizes. Well I tried to order Heliopan Yellow-Green and Green 39mm filters through Amazon.de, but the retailer Foto Palme, Germany then cancelled my order on the grounds that I live in Greece!!! "...Unfortunately, it is not possible to block Greece as a delivery address, so you still were able to order the goods". Now I am trying to locate another supplier which can supply these filters by Heliopan or B+W. Nick Link to post Share on other sites More sharing options...
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