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stevebrot · 07-21-2008, 11:50 PM

Originally Posted by Canada_Rockies

Well, that's one idea down the tubes.

I took a close look at the back of the lens and was unable to find any obvious scratches. There is, however, a slight cloudiness that appears to be on the inner surface of the rearmost element right smack at the center of the lens. It is only visible in oblique light. Fungus? Botched CLA? I don't know, but the position is potentially poison.

I will do some additional tests tomorrow and a direct comparison with my other 50s. If it does not perform to par with my Rikenon 50/1.7 or my Pentax-M 50/1.7 (both reputedly inferior to the Tak), I will request a return trip to the seller.

Steve

07-21-2008, 11:50 PM	#120
stevebrot Pentaxian Join Date: Mar 2007 Location: Vancouver, WA Gallery Photos: 0 Posts: 1,170	Originally Posted by Canada_Rockies Well, that's one idea down the tubes. I took a close look at the back of the lens and was unable to find any obvious scratches. There is, however, a slight cloudiness that appears to be on the inner surface of the rearmost element right smack at the center of the lens. It is only visible in oblique light. Fungus? Botched CLA? I don't know, but the position is potentially poison. I will do some additional tests tomorrow and a direct comparison with my other 50s. If it does not perform to par with my Rikenon 50/1.7 or my Pentax-M 50/1.7 (both reputedly inferior to the Tak), I will request a return trip to the seller. Steve __________________ Pentax K10D :: Pentax-M 200/4 :: Tamron 70-150/3.5 (Adaptall-2) :: LZOS MC Jupiter-9 85/2 :: Pentax-A 50/1.7 :: Pentax-M 50/1.7 :: Sigma 50/2.8 EX DG Macro :: Auto-Rikenon 50/1.7 (M42) :: Pentax-FA 35/2 :: Tamron 28/2.5 (Adaptall-2) :: Pentax-DA 18-55/3.5-5.6 :: KMZ MC Zenitar 16/2.8 :: Pentax Bellows-K Last edited by stevebrot; 07-22-2008 at 11:32 PM..