pen-f vs omd5ii not much difference.
get the omd1ii 

pen-f vs omd5ii not much difference.
get the omd1ii 

I traveled with em5mii + 1240 all the time.
It survived sea wave splash, dusty volcano and wet cave.
The size, weight and weatherproof make travelling fun again.

My only complain is the battery live. So I brought 5 of them when I'm travelling.

good to go…sharing same battery with pen-f and u already familiar with the olympus menu makes your life easier.

How much u get?

If you already have the 45mm f1.8 then I don't see any reason to spend extra 4k for a little bit more of bokeh

Buy the 7-14mm f2.8 or the 35-100mm f2.8 or the 40-150mm f2.8 instead ba? Those focal lengths that you don't have yet

I’m curious. Do you bring all the lens for vacation?

I own the Olympus 45mm f1.8 which I loved for portraits. Like you, most of my pictures are for family portraits and vacation. I also take some event photography, mostly corporate with stage entertainment.

For the Olympus 45mm f1.8, I find that the lens to be a bit too close for a tight head and shoulder shot, and the bokeh to be somewhat insufficient half of the time. This is especially true whenever I want to take tight portraits. I also noticed some perspective distortion when I go in to fill the frame with only head and shoulders for my portraits. I also wanted more 'bokeh' to go along with it.

So I had a choice of the Sigma 56mm or the Olympus 75mm. Due to focal length and perspective distortion, along with size, weight and cost, I did not consider the Oly 45mm f1.2 or the Panny 42.5 f1.2), and opted for the Sigma 56mm after much research.

Beyond 55-60mm (110 to 120mm equiv), I find that expanding the focal length grants very minimal perspective correction (reduce distortion) to the image.

I suppose for your case, the main considerations whether you need a new lens or between the 3 lenses you mentioned would be:

1. Do you need to take tighter portraits, or notice perspective distortions with the 45mm? At 45mm, it is more versatile as it is wider. The most common portrait FL has always been 85-135mm FF equivalent. The 56mm is right smack in the middle.

2. Do you need more bokeh? Look at this link, it can give you some idea of the amount of background blur achievable by the 45mm f1.8 vs 45mm f1.2 vs 56mm f1.4.

https://www.howmuchblur.com/#lens-2x-45mm-f...on-0.9m-subject

To put things into perspective, if in an indoor shoot the 56mm f1.4 with 2m of subject-background distance would give you the same of background blur as with 45mm f1.8 with 5m subject-background distance. With 4m of subject-background distance for the 56mm f1.4, you would need 50m for the 45mm f1.8!

45mm f1.2 would give similar results with the 56mm f1.4.

3. Size and weight. The 56mm is the lightest among all of them.

4. Price. Again, the 56mm is the cheapest.

For me, I wanted more bokeh and notice some distortions, which made me to get an additional Sigma 56mm.

Well, Sigma is also sharp wide open. You can see the Image Resolution page of all 3 reviews on Lenstip. The Sigma does not cost RM 4k, only RM 1.8k.

If you're opting for wide angle, depends on your usage. I also have a wide angle lens now, the Olympus 9-18mm f4-5.6, and find that I can live without the 9mm. The only application I can think of for the 7-10mm range is for astrophotography, occasional landscapes and architecture & real estate uses. What I am getting at is might as well go all the way and get the Panasonic 10-25mm f1.7 during promotion period. It is just RM 2k more.

   

4k can buy japan return tickets and stay there for a few days liao 

not same.
oly 12-40 pro is f2.8 where as the pana 10-25 is f1.7.

2 extra stops of lighting powaaaaah!!!