In article <4ch9am$t21@newsbf02.news.aol.com>, fishfotojr@aol.com says...
>The 283 is NOT harful to TTL or AF cameras. I use then on the FA, F3
>(with coupler) N8008s, N8008,N6006, N90, F4, FE2 and EOS-1s, never ever
>had a problem.

Apparently recent 283's may be low voltage switching (haven't seen any,
but they have been mentioned). If you have the high-voltage type, you
have been VERY lucky....
Hope This Helps