Originally posted by clackers Ordinary consumers like the soccer moms that powered the camera market in 2010-2012 are price sensitive.
One of the guys I was involved shooting beside in the park the other day (I should write book "Causal conversations of long lens wildlife shooters, while waiting for the subject to come into view." ) He was talking about being in Henry's when a soccer mom came in, and asked what point and shoot would give her the best images of her son's soccer matches. She left with a $10,000 Canon system and an appointment to participate in a course on how to use it all. There's soccer moms, and then there are soccer moms.
On another tack, one of the big regrets of my life was not buying the 560 a net dealer with a store front relatively close to my house was selling off for $3000. I seriously don't know what I was thinking when I passed on it.
That being said, carrying around long lenses can reduce the quality of your life. And where I live there are very few places you can effectively use them. The hilly forested terrain make them virtually useless in most of the 7000 square kilometres of the park. MY buddy Jerry, a Canon shooter with a business in the park where he can sell hs prints, never carries a lens longer than 200mm. Many of the best wildlife images have been taken with 70-200mm zoom lenses. A 600mm ƒ4 lens not only depends on me having a huge amount of disposable income, I also would have to have the mindset that that huge investment would be sitting in my closet doing nothing for all but maybe 7 or 8 days a year.
The only real advantage to a 600 ƒ4, that I would actually pay for, would be you can put a 1.4 TC on it and get 850 ƒ5.6. The 510 ƒ4.5 I get with my Tamron 300 2.8 and 1.7x makes 600 ƒ4 unappealing at the price you'd have to pay and the weight you'd have to carry.
If you're standing beside me shooting 600 ƒ4 24 MP FF and I'm shooting the 300 2.8 with the 1.4 APS_c we are shooting virtually the same image, but my set up is a fraction the cost and weight. But it's all matter of personal values. For some reason, I would have bought that 560 for 3k and been happy even using out 7-8 times a year. For 10k,(or even the 6k of a 560) I'd rather have something else.