28-70 F4 quiry

[keith_w]

P. J. Alling wrote:
> Yep, you've got it.  Elements don't just separate from each other.  The 
> rear aspheric element is a  composite made from a ground glass portion 
> and a molded optical glass portion, it's this element that breaks down 
> and separates.  Too bad as otherwise this is a wonderful lens.  I 
> understand that Pentax is now able to repair these but I haven't gotten 
> around to sending my sample in.

You embarrass me, as I have an otherwise perfect one that needs 
attention, and Pentax said "Send it in."
So far, I haven't.
I think I'll hang up a big Post-It note and follow up this week yet!

keith whaley

> David J Brooks wrote:
>> Is this the lens that seemed to fall apart.
>>
>> There was talk last year here, about a lens in this more or less focal  
>> lenght, that was a good performer, but the elements tended to seperate.
>>
>> Was it this one.?? Or another.
>>
>> Actually, comments on this lens would be appreciated.
>>
>> Still trying to determine my Christmas presents to my self. Three  
>> primes or a couple o' zooms.
>>
>> Dave