In article , jontic@vt.edu says...

>I once had a spot attachment for the Gossen Luna Pro--I think it is the
>same attachment that fits the Lunasix--and it was a pain. Definately >not an adequate substitute for a 1 degree spot meter. One of the main >problems is that it requires exposure compensation. You will surely >have to test to fine out precisely how much, and then you sill have to >deal with this factor with every reading or every time you put the >attachment on or off--which for me is quite often. The viewfinder is >very poor also. Another problem is that 5 or 10 degrees is not a very >small slice and will only isolate large areas in a composition.
>
>The Minolta spot attachment is better--nice viewfinder, no exposure
>compensation necessary. I use one with my Autometer 4F. But if you >really need a good spot meter, nothing equals a dedicated meter such
>as the Sekonic.

I agree with all of the above, and will add that I do use my Gossen,
but only once a year for one late evening photo that I take yearly.
I had a Minolta spot attachment, but the "aim" was so bad, it was
useless. With any spotmeter it is a good idea to check the "framing"
of the spot (with a bare light bulb against a dark background, or
equivilant) - if it is not correct, there is no point in using it.
Hope This Helps