Originally posted by raz On the other hand how can a Pentax amateur photograph explains to himself and his wife that he just bought a 55mm with 650$ ?! A lens that will not bring him any money and who is optically not to great compared to the FA 50 who was 3 or 4 cheaper.
This is the nature of hobbies.
How can a hobby photographer explain to his wife that he just dropped 10k or more on a Leica M system?
How can he explain to his wife that he just dropped 3 or 4 k on a Nikon D3?
Hobbies don't require justification. You either have the discretionary income to practice your hobby the way you want to, or you find a way to find the discretionary income to do what you want to do, or you live with a certain level of unhappiness.
The professional OTOH, has to come up with a business plan and has to justify the new equipment acquisition based on an income model.
This is where amateurs and professionals diverge, and it is why the bulk of what we consider "pro" equipment is actually sold to well heeled amateur photographers.
The amateur only needs to ask two questions:
1) Do I want it.
2) Can I afford it.
If both answers are yes, then the justification is made, and the purchase happens.