Pros:
- reasonable size
- cheap, especially on sale
- 1.25x magnification for macro
- more usable 30mm focal length for non-macro
- while not infallible, AF is good
- metal mount
Cons:
- not weather-sealed
- maximum aperture f3.5 is limiting
- you have to get close to do macro
- aside from metal mount, pretty plasticky otherwise
- no lens hood included
I used to own the well-regarded Olympus M Zuiko 60mm f2.8 Macro, yet I never particularly liked it. In fact, it's the only Olympus lens I ever regretted buying. IQ was fine, don't get me wrong, but I found the lens too slow to focus (I often gave up and switched to manual) and 60mm, while fine for macro, is mostly useless for anything else. At least for me.
Sleek packaging, but don't let it fool you. No lens hood included.
Here comes the newer 30mm F3.5 lens: a smaller, more confident-focusing macro lens from Olympus and one with a focal length closer to 25mm (50mm equivalent), giving you a wider field of view in macro and a more useful focal length when you are not actually shooting macro. The best part is once in a while it is sold at a discount making among the cheapest m43 lenses (with AF) you can buy (bought mine for about a hundred bucks).
For macro, you need to stop down a lot, some elbow space and plenty of light for best results.
Some will point out that 30mm is not long enough for macro, that you will scare away shy critters. I will concede that point up front. Yes, it might. And before you ask, yes, it might also make artificial lighting your subjects harder because you will stand closer to them, that is also true. But if you tend to shoot macro with things not so easily scared, and shoot more casually at that, then this is the lens for you.
For size reference, here are the 45mm f1.8, the 30mm f3.5 macro and the 60mm f2.8 macro side by side
The 30mm has another ace up its sleeve: it can shoot macro with greater magnification than the 60mm can. Though in practice, it doesn't make a huge difference, but it's worth acknowledging this advantage.
And IQ is actually... quite good. I would rank it as well above kit-zoom quality and, by the same token, as a possible upgrade path for kit zoom users. As previously stated, the focal length makes it much easier to go out and shoot non-macro stuff around the world.
Quite decent IQ for non-macro.
What is admittedly the lens' greatest flaw is the f3.5 maximum aperture, limiting you more to daylight (outdoors) or flash and other forms of artificial lighting. There is no way to really spin this, it is slow for a prime. But for the price, and the way you can use it for real macro, I think it is worth it.
And the only thing I really miss from my old 60mm macro is the weather-sealing: the 30mm f3.5 has none. But considering its price, again I understand the omission.
What's the difference between 1:1 and 1.25x magnification? Here is a quick and dirty test.
Ultimately, this lens embodies some of the best attributes of m43: small-ish, inexpensive yet very capable. It may not be a do-it-all lens (maximum aperture being the more limiting factor), but if you're looking for a macro lens that can do some double duty for general purpose photography, you can't go wrong here. Definitely recommended.