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This problem is hard to fix . You have to remove each blade of the diaphragm and then remove any "grease" dirt from them with "gasoline" for lighters (or "dry" solvents) and inspect the blades to see if they are not oxyded on their edges ! Then , you have to polish the blades with polishing media , then clean one more time with dry solvent and if your polishing give a too "blank" aspect , you have to "reblue" the steel with a gun blueing chemistry.
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Rare excellent lens, super sharp even at wide open to compare with much more expensive lenses hard to see any quality differences.Very well built as all Olympus OM lenses. It has tripod mount and built-in lens hood. I found viewfinder bit darker with this lens than with Nikon Nikkor 300mm f4.5 ED IF.Lens does not rotate during focusing which is good for using polarizers,almost half the weight of the current AF 300mm f4 from Canon and Nikon, but still not light weight than Nikkor 300mm f4.5 ED IF.Perfect choice for any Olympus or Canon owner works just fine with suitable adapters.The compact styling and superior performance makes this ZUlKO 300mm an ideal tele-lense for sports, wild life even when it is handheld. The lense has a larger filter attachment size which accepts any 72mm threaded filter and usable with Tele-converter1.4X-A. |
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This lens was introduced in 1979, as the final evolution of the reflex
version of Summicron 50, probably the most successful Leica lens of
modern times.
Compared to the first version of this lens, released in 1964, this
third version features, just like the second version (introduced 1976)
a completely recalculated optical scheme, and a completely different
barrel design. The most important change is of course the optical
redesign, which improves the performance of the lens wide open, and
improves the sharpness too, perhaps (like someone says) a little at the
expense of wide open bokeh. There is no optical difference between the
second and third version of the lens, the latter one being compatible
only with the R reflex cameras (thus not any more with Leicaflexes).
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Well know lens, many people says the best lens in Asahi Pentax product line.color rendering, sharpness, "bokeh" just excellent. SMC Takumar 1.8/85mm very well built mechanically, real competitor of another famous lens: Carl Zeiss Jena Pancolar 1.8/80mm. Perform well as close-up and portrait lens.This lens have full aperture meter coupling (for Spotmatic-F, ES full aperture metering system).It has a little tricky Auto-Manual switch you can switch to any position if lens mounted on right Asahi film camera.In any other situation to change mode need to push a little button on the mount surface.Almost every maker best lenses are in this focal length I have many of them like Carl Zeiss Jena Biotar 75mm f1.5, Carl Zeiss Jena Pancolar 80mm f1.8, Nikon-Nikkor-H 85mm f1.8, Helios-40 85mm f1.5.They have not much quality difference, but each lens has own personality. This Super-Multi-Coated Takumar has the best out focus background "bokeh" from all of them. Biotar 75mm f1.5 the best wide-open performer you can't see any visible difference lens is stopped down or not in sharpness. I have the latest version of Takumar 85mm f1.8 with K-bajonett also, M42 version is significantly better as the price shows on the market.
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