OP, you have worded your post to receive the response you want to hear, which is no.
However, I can't really say "no" without a lot more information.
1. Where do these people live? $100K in Kansas is a heckuva lot more $$ than $100K in NYC.
2. Is the camera in any way a profesisonal expense?
3. Does the person who wants the camera buy him/herself a lot of "toys"/have expensive tastes or is this a rare occurrence?
4. Can the camera be purchased on a payment plan which would be easier on the family budget?
5. Will spending this $1500 severely damage the family budget?
When DH or I want to make an expensive purchase, we tend to look at all of the above points before deciding. It then becomes a practical decision as opposed to an emotional one.
My DH is a person who doesn't ever need too many toys and is usually very giving and involved with our family and if this is the one thing that he has been pining for...well, I would figure out a way to make us be able to afford it. But that's because my DH generally buys very little in the way of "spoiling" himself.
If my DH was more of a "flashy" guy...expensive clothes, expensive electronics, expensive cars....I'd probably have more of a problem with him buying himself something else....