Originally posted by snegron1 Last year I set out to purchase a full frame Canon body. I tried the RP and the 6dmk2. I really did not like the smaller size of the RP body. Also, the EVF is nowhere near true optical quality. The RP felt like a slightly oversized Panasonic mirrorless.
EOS R feels better in hand than RP and has better EVF also. But, I think that R5 will offer a OVF kind of experience with its resolution and 120fps refresh rate. RP is a great travel and all around camera due to size and weight, but as you said, it's unbalanced with bigger lenses and its grip doesn't help too much either.
Originally posted by snegron1 So, I ended up purchasing the 6dmk2 without any regrets (at the time). Had I known Canon's plan in advance I definitely would not have wasted my money on the 6dmk2.
Your lenses will work without any compromise on RP, R and I assume that this is also valid with R6 and R5. There is no reason to sell your lenses if you go to mirrorless in the future.
Originally posted by snegron1 There is no way I will ever recoup 1/4 of what I paid, so I'm stuck with that system.
What's your concern? You have one exceptional lens, the 16-35mm f4L, which will be a strong performer with high resolution cameras also. You have the 70-200mm f2.8L lens that will focus on EOS R better than on 6D Mark II and probably even better on R6 and R5. The primes you have are cheap and can be replaced with similars once the RF versions will be release...
So that you understand my point, I replaced my 5D Mark IV with EOS R after extensive testing and I won't replace my EF L lenses until I will have a good reason to do it. A few lenses are in bad shape due to extensive use so those will be replaced with RF lenses. But going to mirrorless for you means at this point only replacing the body first and in time you can replace the lenses also.
It was obvious that Canon will push hard on the mirrorless system once they:
1. Came out strong with pro RF lenses
2. Said online that no more EF lenses will be released.
And if you would like to upgrade from 6D Mark II, 5D Mark IV at current prices will be a big upgrade until new mirrorless cameras will be released, with better and better EVFs.
At this point, if your main focus was and still is DSLR, then I really don't know how Canon or Nikon can take someone by surprise when comes to their future cameras.
I started to play with lots of mirrorless cameras 2-3 years ago in order to adapt to EVFs so that I can make the transition once I got used to them and once I was sure that there are reasons to switch.
If you really want to stick with DSLRs, I'm sure that trading your current lenses for Pentax similar lenses is doable without paying extra. The Pentax 15-30mm f2.8 can be bought with the money from Canon 16-35mm f4L. Pentax DA 50mm f1.8 can be bought with the money from Canon 50mm f1.8 and it is a little better optically than Canon equivalent (Canon was weak on the 50mm focal lenght before they released the RF 50mm f1.2 which is a different story anyway).
What you will do if Pentax will stop making DSLRs in the next 5-7 years and start focusing on mirrorless? At this point mirrorless seems a safer bet, at least for the ones not interested in shooting with vintage lenses (I'm talking about compatibility). Don't get me wrong... depending on what you shoot, a 5D Mark IV, a D850 or a K1 Mark II can all be strong contenders in the next 6-8 years when comes to image quality. By then, all your current lenses will probably need replacement anyway.
So, if I were you, I would start making some plans based on your investment, on your goals, on your financial situation, on alternatives to your system for long term.
All cameras take more than enough quality images for regular shooters. You won't loose a client due to image quality these days. As for lenses and this is a personal opinion, I replace them between 5 to 7 years due to:
1. Extensive use
2. Changing my style and/or my approach (these days I won't put a zoom lens on my camera for example).
So, if I want to switch systems, I would do it once my lenses need to be replace.