OM System 45mm 1.8 review: Is this the best value portrait lens in the World?

Update December 2025: Since first owning and reviewing the Olympus 45mm f/1.8 lens so many years ago, a lot has changed. Olympus sold their camera division, and I’ve shot with just about every system from Micro Four Thirds to Medium Format. But one thing hasn’t changed — the OM System 45mm f/1.8 is still among the best value portrait lenses in the world.

I recently bought the OM System OM-3 and would have picked up the little 45mm again, but it looks like OM System are in the process of updating their 1.8 lenses with weather sealing. I’ve already added the new 17mm f/1.8 Mark II to my kit (review coming once I’ve had more time with it) and am holding out for the updated 45mm f/1.8 Mark II before re-purchasing it for use with my OM-3 and OM-1 Mark II. In the mean-time to see more recent OM Systems content take a look at my comprehensive OM-1 review.

Back to the review:

If you are looking for the best value portrait lens in the World then I think I may have the answer for you.

For many years now I have been shooting a variety of cameras and lenses ranging from Micro 4/3 to large format 4×5 film. As I am not rich I like to get the best gear that I can afford that will do the job I need it to do.

With that in mind I have used many different lenses and for portraits I have found that the Olympus 45mm f/1.8 lens offers the best value of any lens for portrait shots. It comes in at around £200 and is as sharp as you need for portraits. In fact it is pretty sharp wide open at f/1.8 and gets a little sharper when stopped down to f/2.8-5.6.

So below I am going to show why I think it offers great value and is basically a must have lens for every Micro 4/3 photographer.

Don’t forget that you can really help me out by buying this lens through the links on this page. I will earn a small commission and it won’t cost you a penny more.

If you are looking for an even better lens for portraits and don’t mind paying a bit more then be sure to check out my Olympus 75mm f/1.8 review here

Olympus 45mm 1.8 – Handling

There is nothing outstanding about the handling of the Olympus 45mm f/1.8. It is made of plastic and doesn’t feel particularly expensive. However it is still a notch above lenses like the Canon 50mm 1.8 (sometimes called the plastic fantastic). It feels decently made but certainly cheaper than other lenses such as the Olympus 75mm f/1.8 or Olympus Pro zooms. However it is perfectly functional and does what it needs to do.

The reason I mention handling is because it is such a small and light lens that you can easily add this to your bag or even in a pocket and not even notice the weight. This makes it a carry everywhere lens for me and if I was to only have a 2 lens setup the little 45mm would almost always be one of the two lenses that I would carry.

Image Quality.

More importantly, the reason why I think this lens offers such great value is because it offers really good image quality for the size and weight. It is sharp wide open and as mentioned before it improves a little when stopped down.

It easily defines eyelashes when shooting portraits which is one of my prerequisites for sharpness in a portrait lens.

It doesn’t suffer with any major flaws in terms of CA or distortion. Therefore for the price you get a very handy high quality lens that doesn’t add much weight to your setup. The only criticism I could level at it is that sometimes the bokeh can get a little nervous so you have to watch your background sometimes. However you should always be doing that anyway.

The f/1.8 aperture allows it to be used in low light and maintain fast enough shutter speeds to get sharp people images and the focal length is my personal favourite for portrait work.

Below are a few images taken with the 45mm f/1.8.

Olympus / OM System 45mm f/1.8 FAQ

Is the OM System 45mm f/1.8 still worth buying?
Yes. Despite its age, the 45mm f/1.8 remains one of the best value portrait lenses available. It offers excellent sharpness, pleasing subject separation, fast autofocus, and a compact size at a very low price point.

What focal length is the 45mm f/1.8 equivalent to?
On Micro Four Thirds, the 45mm f/1.8 is equivalent to a 90mm lens on full frame. This makes it ideal for portraits, headshots, and isolating subjects.

Is the 45mm f/1.8 sharp wide open?
Yes. The lens is already sharp at f/1.8, especially for portrait work, and improves slightly when stopped down to around f/2.8–f/5.6.

Does the OM System 45mm f/1.8 have weather sealing?
No. The original version of the 45mm f/1.8 is not weather sealed. OM System appears to be updating its f/1.8 prime lineup, so a weather-sealed Mark II version is expected.

How does it compare to the Olympus 75mm f/1.8?
The 75mm f/1.8 offers better build quality and more subject isolation, but it is larger, heavier, and significantly more expensive. For most photographers, the 45mm f/1.8 is the more practical and better-value option.

Is the autofocus good enough for portraits and everyday use?
Yes. Autofocus is fast, accurate, and reliable for portraits, family photography, and general use. It performs well even on older Micro Four Thirds bodies.

Is the OM System 45mm f/1.8 good for beginners?
Absolutely. Its low cost, light weight, and excellent image quality make it one of the best first portrait lenses for Micro Four Thirds shooters.

What camera bodies does the 45mm f/1.8 work with?
The lens is compatible with all Micro Four Thirds cameras, including OM System, Olympus, and Panasonic bodies.