I think the equation is not 1+1 = 2
Its more like 1+ 'me' = ?
The 'me' being each persons preferences for what they want in a system/lens.
The Pentax camera and lenses are often smaller and less encumbering.
I'm no shooter who drives around ignoring the gravity of a D800+Nikon 14-24/2.8+24-70/2.8 combo
I'm a guy on foot and public transport.
Pentax as a smallish, dslr handling/response brand makes sense to me
The screw drive is dependable and less likely to fail.
A Canon lens is toast if the electronics fail (aperture and focus is electronic ).
The Nikon, a bit better, but on-camera lens motor is more likely to fail than screw drive.
Just google for Canikon lens problems with the motor or lens communication and you'd be guaranteed a bunch.
The Pentax lenses are well built and not some 'knocky' plastic like some of the Canikons.
I prefer that.
All this extends to the limiteds and even the legacy lenses.
So in the end, each user has to weigh his/her preferences/needs, and in the end, that bit of cost difference (Pentax vs others) and determine if its something worth it to him or not.
All the systems are a trade-off.
I've mention it here, with examples.
https://www.pentaxforums.com/forums/pentax-full-frame/225739-why-full-frame-p...ml#post2398699
We just decide on the trade-offs that we can live with (or don't care about)
If I were to start over, it will still be Pentax as the primary system, but I've learned over time that I don't need some lenses.
I'd probably just get rid of all the FF lenses and use the DA15, 21, DA35, FA50, FA77, DA100WR
Its the lenses and the system philosophy that I like that makes me stick to Pentax.
I also know that my hand gets itchy all the time, so I'd still be multi system Pentax APS-C+ FF (whatever brand) + Sigma SDM1
Someone posted these on the Pentax Singapore Flickr page a few days ago.
more of his shots here...
2013 | 06 | 02 - Q10 by Tiak Siew Sim of <a href="http://www.sim4nee.com" rel="nofollow">www.sim4nee.com</a> - a set on Flickr
Though I don't shoot these genre, I certainly could appreciate how well done they were.
It just hammered into me how far one can go with the knowledge to lighting and photography in general, rather than just think so much about the gear or brand.
(if you follow the link, you'd also find out what he shot with)