Originally posted by itshimitis Thanks
One lens is a tough one. If it was to be one lens only that would be a zoom, and it's a pity there isn't a fantastic 24 - 70 yet as that is a great walk around lens. I use the Tamron with an adaptor. I haven't really had the opportunity to give the Batis 25 a proper run out yet. Am heading up to the Lake District soon so it will get some use up there, but the weather is forecast to be pretty mean. If you don't mind the fact that it's manual focus, the Loxia 35 f/2 is a beautiful lens. It is well engineered and the markings are engraved, not painted. Have it on f/11 and infinity and on a normal landscape shot, everything will be acceptably sharp. I have used it for panos, most of which due to time constraints have been handheld. It is sharp, not over heavy, easy to use, weather-sealed, and its colours and contrast are good. It is fairly compact also.
The biggest issue for me with the FE lenses is the focus by wire. It's very difficult to get precise manual focus, and that is something that is important for stitching panoramas, as you should aim to be in manual focus for this. This is where the Batis comes into its own. I like the ability to focus with precision and miss not having a distance scale of some sort on the lens. The Loxia 35 and the Tamron also have distance scales. This is how I have taken photos through dirty or wet windows on planes, coaches and boats.
The lens that spends most of its time on my A7RII? The Loxia. I can happily just grab the camera with that on it and know that I will get some shots.
If you have a system in place for the Pentax, I'd be tempted to find out the full specs, though the Sony does have a smaller size. The Sony is a great camera, pretty easy to use, though I do prefer the usability of the menus in my 645Z, the menus are a bit fiddly in the Sony, though I don't really go into them that much.
Thanks a bunch for your input and info! I've read quite a bit about the Loxia 35 f/2, but kind of wrote it off for two reasons. Manual focus only and I'm not a huge fan of shooting the 35mm focal length. With that being said I can adapt to anything for the right combination. I've loved the idea of the RX1r since it came out and was really excited about the mark ii, but as I mentioned, the samples/posts thus far have been very underwhelming which brings me back to the A7r ii. I did see that there is supposed to be a 18mm Batis coming early next year.
The other lens I have been researching and looking into extensively is the Voigtländer 15mm f/4.5 heliar iii. There's a thread on another site that features Ultra-wide Images and nearly every image shot with the A7r ii + 15mm iii Heliar is spectacular and eye catching. I enjoy shooting stitched pano's, but the 15mm may eliminate the need and it is time consuming.
As far as Pentax...I love my K-5 and DA 15mm. That camera and lens combination has served me well. I have been very close to buying the 645z and even several used 645d's. Two things have held me back. The weight of the system as I travel into the back country a lot and secondly, the file size/resolution is probably overkill for what I do/sell.
Anyhow, thanks a bunch for your input and look forward to seeing more of your images in the future!