disclosure ?

Just received a 20mm Nag. T2.... on close inspection I discovered the lens glass on the chrome barrel end (the end that goes into the diagonal has a slight scratch/nick on it. I have seen where an overly aggressive cleaning has marred the lens coating somewhat, however in this case the actual glass has been affected. I will try the EP in my scope to see if the viewing is affected, if so I will have to return the EP. As it is now I cannot re-sell the EP without "disclosing" this problem... No mention of optical glass condition was mentioned in the seller's ad. I did not ask if lens and coatings were mint.... I assumed the glass would be ok. Going to contact seller now and advise him to what I have found. He may have not even noticed this tiny imperfection. Your thoughts on this situation? thank you, John Meiners

It depends on how big the thing is--as you say, the seller might just have missed it. Any known flaw should be disclosed. But in any case, the seller should agree to take back the piece, or offer a discount, assuming it was sold at a price typical of an undamaged eyepiece. You should photograph it immediately, so as to communicate clearly the nature of the problem to the seller.

Once in a long while, one takes a loss on these things. I bought a premium eyepiece some time ago (from a respected astromarter with a very long record) that arrived in the dirtiest condition I've ever seen. I was kind of flabbergasted. After carefully cleaning the eye lens, I found a thin, light, but longish scratch in the coating, which would knock at least $50 off the price. But I let it go. It is remotely possible I put it there in the cleaning process--unlikely, but possible, because I'd never cleaned anything that dirty. It did not affect the view, and I was pretty certain I'd be keeping the piece long term.

My feeling is you inspect a piece before you sell it and disclose any defects. If the buyer could detect a defect so can the seller. You don't have to wait for some sort of excuse from the seller. He needs to ride side saddle on this and make it right...

Hi John,
I had one of the 20mm T-2 Naglers for year, great EP really. I would not think the defect will effect the views, but should have been noticed by the seller. I always inspect EPs before sale and try to list anything that I thought the buyer could possibly want to know about. But, it is possible that it was overlooked.

I am not sure whether it can be repaired anymore, they have been discontinued for a long time. But, if you were interested you could contact Televue to see if they just might have a lens? They are very good about repairs and cost.