Raid Amin Posted March 15, 2018 Share #1 Posted March 15, 2018 (edited) Advertisement (gone after registration) I received from DAG my Zeiss Hologon 16/8 modified to M with 6 bit code. Don advised me to set the camera to automatic lens detection and let the code take over the settings. It was a very bright day today, with strong sunlight during the period 1pm-2:30pm. I used the special ND filter 4X with the lens, setting ISO to 400. I took snapshots in downtown Pensacola, expecting some serious purple edges, and I was right. I don't know if the M9 sensor will behave differently from the M240 sensor. I can tomorrow try out the M8 with the Hologon. The images will be cropped to 21mm or so. I have some hopes left that the older sensor will be less affected by the purple edges. I hope that some people here have used this lens or they understand what is happening when a lens gets that close to the sensor, and maybe I will get some useful tips. Of course, one tip will be "sell the lens"! This is premature after taking 40 snapshots or so. I could use this lens for B&W on my M8 and M9 and in color with a film Leica. There is some software that treats the edges. I can look it up. Is anyone using such software with wide angle lenses on a digital camera? I hope that I am not using this lens correctly and that there are some known steps to follow to get better results. Some will now say "I told you so"! I may also consider using this lens with a film Leica and bypass such problems. Edited March 15, 2018 by Raid Amin 1 Quote Link to post Share on other sites More sharing options...
Advertisement Posted March 15, 2018 Posted March 15, 2018 Hi Raid Amin, Take a look here M240 w. Zeiss Halogen 16/8 first results. I'm sure you'll find what you were looking for!
jdlaing Posted March 15, 2018 Share #2 Posted March 15, 2018 What lens is it six bit coded to match? Quote Link to post Share on other sites More sharing options...
pico Posted March 15, 2018 Share #3 Posted March 15, 2018 It was a cool lens during its time but is not impressive today. . Quote Link to post Share on other sites More sharing options...
Raid Amin Posted March 15, 2018 Author Share #4 Posted March 15, 2018 What lens is it six bit coded to match? It may be the WATE. I could try out several manual settings too. Quote Link to post Share on other sites More sharing options...
Raid Amin Posted March 15, 2018 Author Share #5 Posted March 15, 2018 It was a cool lens during its time but is not impressive today. . This is true for overall performance, but it still is with zero distortion and this is not outdated, I think. Quote Link to post Share on other sites More sharing options...
jmahto Posted March 16, 2018 Share #6 Posted March 16, 2018 Try flat field correction if you use LR. You will need to take sample shots of a uniform white object (color doesn't matter as long it is uniform subject) at various apertures. LR flat field plugin uses the sample shot as a guide and corrects for color variation (as well as optionally vignetting). It is simple with minimal clicks. LR creates corrected DNG leaving the old one intact. 1 Quote Link to post Share on other sites More sharing options...
Raid Amin Posted March 16, 2018 Author Share #7 Posted March 16, 2018 Advertisement (gone after registration) Thank you for this tip on how to enhance the results with LR. I will look into it. Quote Link to post Share on other sites More sharing options...
jdlaing Posted March 16, 2018 Share #8 Posted March 16, 2018 It may be the WATE. I could try out several manual settings too. Try the manual setting for the 18mm Super Elmar and see if that isn’t better. 1 Quote Link to post Share on other sites More sharing options...
jdlaing Posted March 16, 2018 Share #9 Posted March 16, 2018 And just as a test....,turn lens detection off. Quote Link to post Share on other sites More sharing options...
Raid Amin Posted March 16, 2018 Author Share #10 Posted March 16, 2018 And just as a test....,turn lens detection off. I will try these settings. Thanks. There must exist some optimal setting! Quote Link to post Share on other sites More sharing options...
jdlaing Posted March 16, 2018 Share #11 Posted March 16, 2018 I will try these settings. Thanks. There must exist some optimal setting! I think if you set the camera to make correction for a Leica coded lens and use the Hologon it tries to make corrections for things that aren’t there. Quote Link to post Share on other sites More sharing options...
Raid Amin Posted March 16, 2018 Author Share #12 Posted March 16, 2018 DAG wrote me today to set the camera to automatic lens detection based on what he has heard from his past customers who got their Hologon lenses adapted and coded by DAG. Quote Link to post Share on other sites More sharing options...
jmahto Posted March 16, 2018 Share #13 Posted March 16, 2018 I will try these settings. Thanks. There must exist some optimal setting! Note that in-camera lens correction (if any) is only for vigneting and distortion, not for colors. This had been my understanding (happy to be corrected). This is why there is no substitute for flat field processing regardig color correction. Quote Link to post Share on other sites More sharing options...
Raid Amin Posted March 16, 2018 Author Share #14 Posted March 16, 2018 Most posted images with Halogen are in B&W, so maybe people gave up. Quote Link to post Share on other sites More sharing options...
jaapv Posted March 16, 2018 Share #15 Posted March 16, 2018 To clarify: meant is the Hologon It is a bit of a cult lens, but it really should be used on film to deploy its quality. 1 Quote Link to post Share on other sites More sharing options...
jaapv Posted March 16, 2018 Share #16 Posted March 16, 2018 Note that in-camera lens correction (if any) is only for vigneting and distortion, not for colors. This had been my understanding (happy to be corrected). This is why there is no substitute for flat field processing regardig color correction. For colour vignetting too, but not for the amount of shift that this lens produces; Only Flat Field correction works. 1 Quote Link to post Share on other sites More sharing options...
Raid Amin Posted March 16, 2018 Author Share #17 Posted March 16, 2018 To clarify: meant is the Hologon It is a bit of a cult lens, but it really should be used on film to deploy its quality. Of course, it is the HOLOGON. Quote Link to post Share on other sites More sharing options...
Raid Amin Posted March 16, 2018 Author Share #18 Posted March 16, 2018 For colour vignetting too, but not for the amount of shift that this lens produces; Only Flat Field correction works. I need to learn more about Flat Field correction, Jaap. Quote Link to post Share on other sites More sharing options...
Raid Amin Posted March 16, 2018 Author Share #19 Posted March 16, 2018 So I may need to download and use CORNERFIX. Take a photo of a white background and then use this software to adjust for the purple cast in the corners. Then this profile can be used for multiple images. There is hope! Quote Link to post Share on other sites More sharing options...
Guest JMF Posted March 16, 2018 Share #20 Posted March 16, 2018 So I may need to download and use CORNERFIX. Take a photo of a white background and then use this software to adjust for the purple cast in the corners. Then this profile can be used for multiple images. There is hope! Just go easy with the Cornerfix or Flat field plugin corrections as strongly underexposed corners will show noise . I had a 16 Hologon M converted for a while, used it with the MM ccd. The Hologon lens quality is superb as you shots attest . Should fare well on the M8 and on film , let us know ! Quote Link to post Share on other sites More sharing options...
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