Originally posted by Hidrieus but the seller says that there is light haze inside that does not affect the image. How correct can this statement be?
What it means is that the seller is convinced that
they will not be bothered by the haze once it sells. The truth is that scratches or haze on an internal element will almost always affect image quality and, as noted above, may also affect the auto-focus performance with that lens. Kudos to the seller for disclosing the problem, but 2pts off for claiming it is nothing.
A larger question is the nature of the haze. Causes might include fungus, redeposition of lubricant or other vapors, fine dust, fine scratches due to botched cleaning attempt (often to remove fungus), crazing caused by fungus. A professional cleaning can correct dust or chemical fouling. The others are essentially permanent.
Steve
BTW...the price seems high to me
and is close to what that lens sold for new.