Carlos C

I would take the 18 f2 or buy the cheap Samyang 12 f2 (you'll need wide mainly for interiors and temples) and 35 f2 or 50 f2. The X100T is always a very handy small camera that covers 23mm, acts as a backup camera just in case and don't have to switch lenses all the time. That tele 50-230 could be useful sometimes.
I've been in Thailand 7 years ago on honeymoon for about 2 weeks late October and got some rain showers but not much to worry about - 1 week in Bangkok, North (Chiang Mai, Chiang Rai, Mae Sae) and other week on South. By then I was a Canon user and took 3 zooms - Wide, normal and tele and a small pocketable Panasonic LX-3 just for some videos.
Nowadays with my Fuji gear I would take the X-Pro 2, 16 f1.4, 35 f2 and a X100F. Probably I'd buy a tele like yours, is useful for some wildlife and some shots of people praying that you don't want to disturb keeping a comfortable distance. Have a nice trip, it's a great country to visit with very nice people.

I would take the 18 f2 or buy the cheap Samyang 12 f2 (you'll need wide mainly for interiors and temples) and 35 f2 or 50 f2. The X100T is always a very handy small camera that covers 23mm, acts as a backup camera just in case and don't have to switch lenses all the time. That tele 50-230 could be useful sometimes.
I've been in Thailand 7 years ago on honeymoon for about 2 weeks late October and got some rain showers but not much to worry about - 1 week in Bangkok, North (Chiang Mai, Chiang Rai, Mae Sae) and other week on South. By then I was a Canon user and took 3 zooms - Wide, normal and tele and a small pocketable Panasonic LX-3 just for some videos.
Nowadays with my Fuji gear I would take the X-Pro 2, 16 f1.4, 35 f2 and a X100F. Probably I'd buy a tele like yours, is useful for some wildlife and some shots of people praying that you don't want to disturb keeping a comfortable distance. Have a nice trip, it's a great country to visit with very nice people.

As a sort of paid-to-travel professional, from my experience Spain is your worst destination as far as pick pockets go, Barcelona and Madrid especially. Our airline keeps statistics on theft and robberies of it's staff and customers. Out of all our destinations, Madrid is at number 1, Barcelona at 2 and Malaga at 3. New York is at 4, Paris is at 5 and London only at 11. From our entire African network, only Kinshasa makes the top 10 at spot number 7.
 
Just use a plain messenger bag, and rotate it forward so you can keep your hands on it in crowded places. Subways and other public transport are the prime hotspots. Watch out for little kids, gangs employ minors because they can't be held when they're caught. Keep your back against a wall if possible, if you see someone suspicious, just stare them down. That usually gives them the message that you're not some bloody tourist.
 
If you see something strange or some popular street artist whom everyone is watching, be aware that this usually is the decoy that is used so pickpockets can strike. They just cut open your bag with a scalpel. You'll never feel it. In Budapest, thugs often start fights between two accomplices, just so that innocent bystanders are distracted. In a few seconds, people get robbed and they never knew what hit them.
 
If you stop to eat, drink, just wrap the strap of your camera and/or bag around a chair leg or other fixed object. Often a runner will grab your bag and be gone before you know what happened.
 
Keep valuables in the safe in your room at all times, I've had people come into my room several times already, even while I was in it. Keys are easy to copy, and a few minutes away is all they need. I don't carry a wallet. I just keep cash and 2 credit cards and one ID in my front pocket. The phone I usually stash away deep at the bottom of my bag.
 
Also, don't take too much stuff. I tend to travel with only one camera and maybe one extra lens. Less is usually more when travelling. If you don't need a bag, just leave it in the safe.
 
I use a ThinkTank Retrospective 5, with all the inserts removed. Just because it looks plain. You don't need that padding anyway.
 
And most importantly, have FUN. I'm away some 120 days a year and all these tips are common sense, but they never stop me from doing what I want, where I want. Apart from the prime tourist hangouts, you'll be just fine.

Just got this email:
 
=====================
 
From: Fujifilm <xxxxxxxxx xxxxxxx@fujifilm.xxxxxx.com>
Date: 19 June 2017 at 09:48:47 WEST
To: Mr Bonn <adam.bonn@xxxxx>
Subject: Your query regarding Fujifilm
 
Ask Fujifilm
 
Dear Mr Bonn,
 
 
Thank you for contacting Fujifilm UK.
 
Fujifilm in Japan are working on a firmware upgrade to fix this phenomenon. It will be announced as soon as it is available.
 
We apologise for this inconvenience.
 
Kind regards
 
The Fujifilm X World Team
 
=======================
 
I can't imagine it's worth asking WHEN as Fuji UK are unlikely to know and let's be honest the recent historical FW releases have been announced as "coming late May" so I doubt we'll get a cast iron date
 
Still on the plus side, it sounds like Fuji are acknowledging there's an issue and are working to rectify it
 
So PERSONALLY I'm not that unhappy, had this email said something like 'we can't replicate the problem, have you tried a system reset, beyond that we don't have any suggestions' then I'd have been pretty far from happy
 
So now we wait for the next FW.

This post may be rambling, but I have spent a lot of time and money trying to determine the right '3-4' lenses (for me).
 
At one time or another, I have owned all of the Fuji offerings except the 27, 50-140 & 100-400.  I may pick up a 27 eventually, but I have no interest or need for the 50-140 or 100-400. If I wanted to carry a bag of bricks around I would have kept my Canon FF 'L' kit. 
 
I shoot travel, cityscape/ landscape almost exclusively. I shot portraits professionally, but I haven't done so in a few years now.
 
My goal is to carry as little as possible, while maintaining the ability to capture most any shot I see. I also hate changing lenses on the fly. 
 
I have distilled my current kit down to three lenses:  16/1.4, 35/1.4 & 18-135.  These three lenses do just about everything I need them to do.
 
I carry two bodies - X-Pro1 and X-T1 each with a lens mounted.  The 16 and 35 are my 'fast prime, walkabout kit'.  The 16 and 18-135 are my 'landscape kit'. 
 
The 18-135 is an underrated lens. I have done some pretty extensive A-B comparisons between the 18-135 and the 18-55/ 55-200 combo and can't find much difference between them. The weather-resistance of the 18-135 (and 16) is a feature not to be overlooked for landscape photography. Not to mention that the IS of the 18-135 is at least one stop better than the older pair.  (better 'macro' too!)
 
Of the lenses that I have owned, the only two I really miss are the 56 and 90. Both of the lenses are awesome.
 
For landscapes - I highly recommend the 16mm. It offers practically no distortion and is crazy sharp (even at f/1.4!). The 14mm is great and a little wider, but it is two stops slower. That is a BIG difference if you want the lens to double as a walkabout or event lens.  The 10-24 is also great, but IMHO the forced perspective of any lens wider than the 14 make landscapes appear unnatural. (I also trend toward primes.)  You do however, need at least one zoom for landscapes, because you can't always 'zoom with your feet'. 
 
Portraits and weddings make the 56 or 90 indispensable.  
 
So -
 
Three lenses: 16, 56 and 18-135. You shoot: Landscape (16, 18-135) , Portrait (56) and Wedding (16, 56) - done, done and done.     
 
Four lenses: If you believe that an ultra-wide is a must, you can add the 10-24 or, for a lot less money, the Samyang 12mm f/2 is superb. 
 
Or, if (like me) ultra-wide is not your thing, I would go with 16, 35, 90 & 18-135.  Those three primes are killer for street/city/event and weddings. The 18-135 will be your 'Swiss Army Knife'. 

You need a wide, a normal and a telephoto.
My wide is the 16mm (but the 14mm is another good choice. Slower but wider, smaller and lighter. And the 18mm f2 is a good, small, low-priced alternative with a 28mm full-frame equivalent field of view)
My normal lens is the 35mm f2 (but you could have the slightly-wider 23mm or the 35 f1.4)
My telephoto is the 56mm, which is great for portraits (but people also like the super-sharp but bigger and heavier 90mm)
My fourth lens is a camera - the X100T. Which is why I don't have the all-purpose 23mm lens: this camera does that job and has some extra benefits besides - small, silent, fast flash sync.
 
This chart, from Ken Rockwell, is very useful. Bear in mind it's talking full-frame focal lengths.
 

 
 
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To answer the question, I'd probably go with the f/2 for 3 reasons
1. Smaller (one of the biggest reason I switch to Fuji from Canon is to have a compact more discreet, lighter)
2. Cheaper (I'm a hobby photographer and have to be somewhat reasonable when I buy gear )
3. Faster AF 
 
But, if you told me I could only have one lens and only could chose between these 2 I'd go with the 1.4