Archived posting to the Leica Users Group, 2009/03/26
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]On Mar 26, 2009, at 7:50 AM, George Lottermoser wrote: > I agree with Henning. > The filters (and coding) increase quality and reduce post processing. > You can, however, achieve decent, good quality work without. > I started with one coded lens, 50 lux asph, and filter. > That one filter would move to 28 cron and 35 lux asph when I changed > lenses (workable yet not fun). > Once I had filters for all four main lenses (75 lux being the > fourth) and could leave them on - it became a bit simpler and more > pleasurable. > Getting the 28 cron coded improved the cyan corner issues. > Only the 35 lux asph remains to be coded - it doesn't have major > corner issues - but when budget allows - I'll have it coded. > The 75 lux probably will never get coded. > > I'm always quite amazed by the M8 files with the 65 and 135 elmars hi George, I assume the 135 Elmar is the 135/ f4 Elmar in M mount? Steve > something about these ancient configurations > seem to allow them to work quite well > without coding or filters > > Regards, > George Lottermoser > george at imagist.com > http://www.imagist.com > http://www.imagist.com/blog > http://www.linkedin.com/in/imagist > > > > > > On Mar 26, 2009, at 12:14 AM, Henning Wulff wrote: > >>> I'm sure you'll hear from a lot of people that IR cut filters >>> aren't really necessary. >> >> Unfortunately, for the best quality they are. Even outdoors on >> sunny days they are as IR reflection off leaves is quite intense >> and makes the colours murky. The only time that the IR filters are >> not necessary is when there is no IR radiation, as on very overcast >> days or under bad flourescents. The 'synthetic clothing' thing is a >> bit of a red herring, pun unintended. You'll find black cotton and >> black wool, black cars and black furniture that all gets various >> funky magenta hues. It can be subdued with clever Photoshop work, >> but not eradicated, and it doesn't solve the following problem. >> >> IR also causes some degradation of sharpness, as the IR doesn't >> focus at the same plane as the visible light. This will generally >> be more noticeable with older lens designs. >> >> So - best plan on getting IR filters at some time. I assume the 35 >> Summilux is the non-ASPH that uses the series 7 filters? If so, and >> if your 90 Summicron is an older one that uses 48mm filters, or >> somewhat later that uses 49mm filters, you're in luck, as the 48 or >> 49mm filters can be reversed in the hood of the Summilux where the >> series 7 filters reside. Then get a step down ring from 48 (or 49) >> to 39 and you can use the filter on the 50 Summicron and the 21CV >> as well. Switching lenses (and filters) can be a pain, though. >> >> The 21CV should be coded, as should all lenses below 35mm. Best is >> to either get an adapter ring (Leica thread to M bayonet) from John >> Milich which has the pits in the correct locations, or buy a 'type >> 2' Cosina adapter from cameraquest and send it to John Milich to >> get the pits engraved. Then just paint in the dots to code the lens >> as a 21 Elmarit. Works great; no cyan corners and even illumination. >> >> Your other lenses don't need to get coded as the cyan corners are >> barely noticeable (35mm lens) to non-existent (50 and 90mm). >> >> That leaves the Nocti. You can try to live without a filter for a >> while, and you can compare the results from the Summicron to see if >> it's worth it. I eventually did get a filter for it. >> >> So, budget about $200 for filter, adapter rings and John Milich, >> and you should be set to start. >> >> A short term solution for the 21 is the Cornerfix program, but it's >> a bit of a pain and the quality can drop a bit erratically. >> >> If you have any further questions, fell free to ask. >> >> Regards, >> >> Henning >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information