OK. I need a multicoated lens with a focal length around 180-210mm for close up work. I see that almost all of the lenses that i have tested get perfectly sharp at apertures like f16~22. So sharpness is not the issue. The two issues those still remain are
1) Standard taking lenses are prone to chromatic abberation at close up distances. So I need a lens designed for Magnification Ratios like 1:2
2) Single coated lenses produce noticibly lower contrast compared to MC ones (this is a big group of lenses including almost all process lenses such as G Clarons, Konica Hexanon GR-II, Graphic Kowa etc etc)
OK I can not rise a $750 for a second hand Macro Sironar, Nikkor AM ED or Macro Symmar right now. Fujinon A 180 seems to be a choice here. Any other ideas?
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