Oops sorry. I do some landscape images, but at the moment mainly cricket, aviation, shipping & some macro.

I've had a K-3 for just over 2 years & have been very pleased with it. But lately it's been doing a few odd things and on Saturday the AF refused to work. I've been considering buying a second camera to have as a spare anyway so maybe now's a good time to get a new body, then have the K-3 repaired as a spare.
Trouble is - what to get?
Am considering either another K-3, or a K-3II (but already have a GPS unit), K-70 or even a K-1.
Having recently bought new Pentax lenses, 300mm, 150-450mm & 560mm, as well as others bought last year, I want something that will work well with them i.e if I get a K-1, I feel I wouldn't be making getting the full benefit being full frame.
I had a long chat with SRS yesterday, after which it seems another K-3 would be more suitable?
Any advice would be very welcome.

I'm having similar issues with my new 150-450mm. I used it for the first time last Wednesday taking nearly 500 shots with my K-3.
I found shots taken at around 400mm seemed much clearer & sharper than at 450mm (see my thread 300mm v 150-450mm).
I sent some sample images to SRS and waiting to see what they think.

Tried my new 150-450mm on Wednesday at a cricket match taking nearly 500 shots.
As others have also commented, I've found images taken at 450 are good, but are much better if I reduce the zoom to about 400mm.
At that setting, they seem much clearer and sharper.
I used a monopod all the time and kept speed around 1/800th and ISO around 320.
Hmmm 🤔

Thanks, I did consider the converter and the weight, but decided to go for the 150-450.
It wasn't an easy decision!

Thanks. I've just spoken to someone else at SRS as I was seriously considering getting the 300, then return one later if needs be.
He was very praising of the 150-450 and said it has newer optics than the other.
So glad I ordered it and won't get the 300 now.
Thanks Mike.

Thanks for the comments and excellent shot Bill.
I can see both lenses will be useful hence it was a tricky decision.
Mike, I didn't know there was a 400 out there or is it a discontinued model?

Bill,

I saw on reviews that others used their converters a lot too.

I think maybe I'll end up getting both in the end!

I very nearly went for the 300 as being a Prime and lighter were advantages.
But felt that 300 just not high enough for what I wanted.
Although I'll be seriously thinking of maybe getting it too.

Ha, don't tempt me. I very nearly went for both as the 300 had very good reviews too.
I might get one one day 🤔