aoleg
Joined: 22 Feb 2008 Posts: 1387 Location: Berlin, DE
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Posted: Sat Aug 22, 2009 7:07 am Post subject: |
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aoleg wrote:
poilu wrote: |
congrats, you clean it fast; sun barely move in between
many prefer low contrast lens and fix it in post processing
that could be the solution; to put some haze on the rear element |
LOL, it took me a day to figure out what to do (or, rather, what not to do), so the sun is, indeed, at similar positions. I didn't want to mess around with levers and springs and ball bearings... so spent some time researching and asking questions.
Apparently, this lens features a special 'floating' element designed to correct for its close focusing ability (MFD 0.9m). This element gets haze often, as the main optical unit moves air right onto it. If the lens gets hot, the lubricant vaporizes, and this 'floating' element is the only place it can condensate. Fortunately, this piece of glass is not connected to the main optical unit, and is instead attached to the lens mount. This, in turn, makes it an easy fix. Took me 5 minutes of work after a few hours of reading and emailing.
As to haze being a solution to lower contrast, consider this: haze does not add meaningful detail to the image. It simply shifts your black point to the right. When processing, if you move the black point, you are compressing the tonal range, losing smooth color gradation. _________________ List of lenses |
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estudleon
Joined: 15 May 2008 Posts: 3754 Location: Argentina
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Posted: Sat Aug 22, 2009 1:27 pm Post subject: |
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estudleon wrote:
Aoleg: Well done!!
Enjoy your new "clean" lens.
Another haze lens? Haze inside the glass element because the tension of the different mass of glass as a defect of making process. The glass isn't homogenous. Not solution!!
Rino _________________ Konica 2,8/100
CZJ: 4/20, 2,4/35, 1,8/50 aus jena, 3,5/135MC, Pentacon 1,8/50
Pentax S-M-C-1,4/50
Helios 44-3
Mamiya 2,8/135
Misc. : jupiter 9
Stuff used:
A) SRL
Alpa 10 D - kern macro Switar 1,9/50 -black, Kilffit apochromat 2/100.
Asahi pentax spotmatic super takumar 1,4/50
Contaflex super B tessar 2,8/50 Pro-tessar 115
Leica R3 electronic summicron 2/50 elmarit 2,8/35
Konica Autoreflex 3 (2 black and chrome one), TC, T4. 2,8/24, 3,5/28 not MC and MC, 1,8/40, 1,4/50, 1,7/50 MC and not MC, 1,8/85, 3,2/135, 3,5/135, 4/200
Minolta XG9 2,8/35, 2/45, 3,5/135
Nikkormat FTn 1,4/50, 2,8/135
Fujica ST 801, 605, 705n. 3,5/19, 1,4/50, 1,8/55, 4/85, 3,5/135.
Praktica MTL 5 and a lot of M42 lenses.
Voigtlander. Bessamatic m, bessamatix de luxe, bessamatic cs, ultramatic and ultramatic cs.
Skoparex 3,5/35, skopagon 2/40, skopar 2,8/50, skopar X 2,8/50, super lanthar (out of catalogue) 2,8/50, dinarex 3,4/90, dinarex 4,8/100, super dinarex 4/135, super dinarex 4/200, zoomar 2,8/36-83, portrait lens 0, 1 and 2. Curtagon 4/28 and 2,8/35
Canon AV1, 1,8/50
Rolleiflex SL35 and SL35 E. 2,8/35 angulon, 2,8/35 distagon, 1,4/55 rolleinar, 1,8/50 planar, 4/135 tessar, 2,8/135 rolleinar, x2 rollei, M42 to rollei adap.
Etc.
RF
Yashica Minister III
Voightlander Vito, vitomatic I, Vito C, etc.
Leica M. M2, M3 (d.s.) and M4. Schenider 3,4/21, 2/35 summaron 2,8/35 (with eyes). Summicron 2/35 (8 elements with eyes), 2/35 chrome, 2/35 black, 1,4/35 pre asph and aspheric - old -, 2/40 summicron, 2,8/50 elmar, 2/50 7 elements, 2/50 DR, 2/50 - minolta version, 1,4/50 summilux 1966 version, 1,4/75 summilux, 2/90 large version, 2/90 reduced version of 1987, 2,8/90 elmarit large version, 4/135 elmar. |
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