jbl Posted April 26, 2014 Share #1 Posted April 26, 2014 Advertisement (gone after registration) In practice for normal-ish lenses, is there much of a difference between using CornerFix or using the in-camera manual setting for non-coded lenses? Metadata aside. -jbl Link to post Share on other sites More sharing options...
Advertisement Posted April 26, 2014 Posted April 26, 2014 Hi jbl, Take a look here Corner fix vs. in camera setting. I'm sure you'll find what you were looking for!
Dougg Posted April 26, 2014 Share #2 Posted April 26, 2014 I think the main difference is that CornerFix gives you control over the process... you make the profile that does the fixing and can tweak the process in the Prefs. OTOH it's inconvenient. In Sean Reid's reviews he often finds that the camera overcompensates for corner color shift and/or illumination fall-off. OTOH it's convenient. The lens typically requires more "fixing" at wide apertures but the camera applies the same "fix" regardless. Same for CornerFix if you use just one profile for the lens, but you do have the option of making profiles for several apertures or aperture ranges, separating the "fix" on specific files according to apertures used and applying the appropriate profiles. While that is really inconvenient, it's an option if you're very particular about the results. I'll add that all this is primarily for wider lenses. "Normalish" and longer lenses may not show any visible need for adjustment either in-camera or out, something to look at for the individual lens. Link to post Share on other sites More sharing options...
jbl Posted April 26, 2014 Author Share #3 Posted April 26, 2014 I had thought the camera used the eye thing in the front to attempt to guess f-stop to apply the "right" amount of correction. Did I have that wrong? Link to post Share on other sites More sharing options...
Dougg Posted April 26, 2014 Share #4 Posted April 26, 2014 The "eye" thing does give the camera a non-TTL sense of ambient light level, but this is only for reporting an aperture estimate in the EXIF, as I understand it. Link to post Share on other sites More sharing options...
flyalf Posted April 27, 2014 Share #5 Posted April 27, 2014 I think one should combine at least 3 different fixes depending on lens used; 1. Cornerfix for colour cast/wignetiing correction (not distortion), 2. In-camera FW correction for for colour cast/wignetiing. Imo this is not as powerful as CF for some lenses, nor does it take into account aperture used. 3. Lightroom lens correction for distortion. Since using only In-camera supported lenses I only now uses 2. and 3. There are native in-camera supported Lerica lenses such as 28/2,8 ASPH. Link to post Share on other sites More sharing options...
jaapv Posted April 27, 2014 Share #6 Posted April 27, 2014 Or use the flat field correction built into some raw converters. The C1 system is particularly user friendly. Link to post Share on other sites More sharing options...
dante Posted April 27, 2014 Share #7 Posted April 27, 2014 Advertisement (gone after registration) If you are not a control freak (CornerFix has awesome controls), the Adobe Flat Field plugin for LR is a lot more convenient, since you can generate new DNG files directly from Lightroom. It does luminance and color shifts, and in my tests (which mostly centered around the 21/4.5 Biogon, which is supposed to be "impossible," it worked a lot better than CornerFix. Dante Link to post Share on other sites More sharing options...
jaques Posted April 27, 2014 Share #8 Posted April 27, 2014 I wish there was some way that I could create my own profiles for my vintage lens arsenal with my M240... if Leica would add the ability to create custom profiles in camera via firmware update... even if there are no adjustments made- just the lens name/data recorded... Perhaps this data could then be used by some software to automatically apply corrections at import? Leica should buy CornerfixTM and work with them to produce better firmware updates for the M240 and M9? That would totally be 'das wesentliche'... but I am perhaps in an obscure M user minority: I have more than 25 M mount lenses but only one coded one. Also most of my lenses are not supported by the Leica selectable codes even though many of them are Leica lenses... Link to post Share on other sites More sharing options...
flyalf Posted April 28, 2014 Share #9 Posted April 28, 2014 I wish there was some way that I could create my own profiles for my vintage lens arsenal with my M240... if Leica would add the ability to create custom profiles in camera via firmware update... even if there are no adjustments made- just the lens name/data recorded... Perhaps this data could then be used by some software to automatically apply corrections at import? Leica should buy CornerfixTM and work with them to produce better firmware updates for the M240 and M9? That would totally be 'das wesentliche'... but I am perhaps in an obscure M user minority: I have more than 25 M mount lenses but only one coded one. Also most of my lenses are not supported by the Leica selectable codes even though many of them are Leica lenses... Totally agree. But for some reasons die-hard Leica fans don't seem to agree. For M9 I solved this by having a separate folder on SD card per lens, but for the M this option is taken away. Its not possible to choose folder in M Link to post Share on other sites More sharing options...
jaques Posted April 28, 2014 Share #10 Posted April 28, 2014 sometimes it seems to me like a law amongst the fans: if Leica do it- it is a brilliant idea / if Leica don't do it; it is not worth doing. I never realized I could create folders like that on the M9. Link to post Share on other sites More sharing options...
jbl Posted April 28, 2014 Author Share #11 Posted April 28, 2014 I hadn't realized that either. What do you put in the folders? Or do you just name them for each lens? Link to post Share on other sites More sharing options...
pgk Posted April 28, 2014 Share #12 Posted April 28, 2014 I wish there was some way that I could create my own profiles for my vintage lens arsenal with my M240... if Leica would add the ability to create custom profiles in camera via firmware update... even if there are no adjustments made- just the lens name/data recorded... Perhaps this data could then be used by some software to automatically apply corrections at import? Leica should buy CornerfixTM and work with them to produce better firmware updates for the M240 and M9? That would totally be 'das wesentliche'... but I am perhaps in an obscure M user minority: I have more than 25 M mount lenses but only one coded one. Also most of my lenses are not supported by the Leica selectable codes even though many of them are Leica lenses... The problem is not simple. From my own usage of non-coded lenses, if I am being pedantic I find that the degree of adjustment depends on the lens (my 21mm f/3.4 SA is the worst offender due to its optical design), the aperture used and the distance of the point of set focus, and of course there is an increase in the amount of adjustment as focal lengths becomes smaller. So if you are being a perfectionist, there are a lot of adjustments to do. Of course you could sort out ALL these adjustments by creating relevant profiles in Cornerfix and then carrying a notebook (the manual. analogue exif solution) around to note all settings used as you take the photographs....... Link to post Share on other sites More sharing options...
flyalf Posted April 29, 2014 Share #13 Posted April 29, 2014 I hadn't realized that either. What do you put in the folders? Or do you just name them for each lens? Yeah, I switch folder per lens so that all photos from one lens is in one folder. That way its easy to post-process for that lens(EXIF, CF...). Link to post Share on other sites More sharing options...
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