paulau Posted May 15, 2007 Share #1 Posted May 15, 2007 Advertisement (gone after registration) Hi, I am wondering which of my lens to get modified for 6 bit or buy a custom screw to M to adapter for. Is it only necessary for lenses wider than 28mm? should i actually bother with say a 50mm? Any thoughts would be appreciated. Regards, Paul Link to post Share on other sites More sharing options...
Advertisement Posted May 15, 2007 Posted May 15, 2007 Hi paulau, Take a look here What focal lengths is the 6 bit coding really need for?. I'm sure you'll find what you were looking for!
Morten Grathe Posted May 15, 2007 Share #2 Posted May 15, 2007 I use an uncoded 35mm. It works fine, but I wouldn't go any wider without coding. Leica recommends coding for 35mm, but I don't find it necessary. Link to post Share on other sites More sharing options...
parigby Posted May 15, 2007 Share #3 Posted May 15, 2007 I think Morten is right. My dealer suggests 35mm and wider. Don't bother with 50mm and the rest, other than to make sure you have the filter on the M8. philip Link to post Share on other sites More sharing options...
cme4brain Posted May 15, 2007 Share #4 Posted May 15, 2007 Hi, I am wondering which of my lens to get modified for 6 bit or buy a custom screw to M to adapter for. Is it only necessary for lenses wider than 28mm? should i actually bother with say a 50mm? Any thoughts would be appreciated. Regards, Paul Hey there Paulau; Welcome to the forum. From what I have read and my personal experience, coding of lenses is not necessary with lenses longer than 35mm (under 35mm length, yes, I would code the lens). So your 50mm, 75mm, and 90mm lenses really don't need to be coded. In fact, according to the latest Sean Reid article on 75mm lenses, coding the 75mm lens actually results in an over-aggressive correction of vignetting- you are better of NOT coding the lens. Link to post Share on other sites More sharing options...
sean_reid Posted May 15, 2007 Share #5 Posted May 15, 2007 Hey there Paulau; Welcome to the forum. From what I have read and my personal experience, coding of lenses is not necessary with lenses longer than 35mm (under 35mm length, yes, I would code the lens). So your 50mm, 75mm, and 90mm lenses really don't need to be coded. In fact, according to the latest Sean Reid article on 75mm lenses, coding the 75mm lens actually results in an over-aggressive correction of vignetting- you are better of NOT coding the lens. Hi Lloyd, Right...that's true with the current firmware at least. Newer firmware may be better dialed in for that correction. In any case, the coding is needed for 35 mm and wider lenses when the IR-cut filters are used. I say that based upon my own fairly extensive testing. Cheers, Sean Link to post Share on other sites More sharing options...
paulau Posted May 16, 2007 Author Share #6 Posted May 16, 2007 Ok, thats good, less lenses to do Is it worth using an IR cut filter on a 50mm? also if i'm not using the filter on a lens wider than 35mm, should i still code it? Regards, Paul Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted May 16, 2007 Share #7 Posted May 16, 2007 Advertisement (gone after registration) The IR filter is used to cut the IR contamination so yes every lens you have. Coding serves two puposes one for vignetting and the other to eliminate the cyan cast created by the IR filter for lenses wider than 35mm. Actually there is a third coding also will give you the lens used in the EXIF data Link to post Share on other sites More sharing options...
jonoslack Posted May 16, 2007 Share #8 Posted May 16, 2007 HI Paul I'm doing all of mine - it's just great to have the lens information in the exif. I do mostly nature and landscape photography, and I've decided (for now at least) that I get better results without the IR cut filters - but I still like to have the lens information. You pays your money Link to post Share on other sites More sharing options...
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