M4/3 System - Lens Report

Olympus 75-300 Mk2  (July 2014, - Updated Dec.2016)

Going Long with M4/3

I love many aspects of the Micro Four Thirds system, but one area that still currently concerns me is the lack of very high quality lenses through certain parts of the range. And it was this search for more reach which eventually led me to the Olympus 75-300 Mk2.

Unlike the similar Panasonic lens, this Olympus counterpart does not have optical stabilisation, therefore it will be best suited to cameras with in-body stabilisation. Until recently this would have meant it was only suitable for Olympus M4/3 camera bodies, but finally braking with tradition Panasonic introduced their GX7 which is a diminutive 'rangefinder look-alike' styled stabilised M4/3 camera.

The following report intends to be a work in progress based on my user experiences while shooting real world images (and not test charts) with the Olympus 75-300 Mk2 lens coupled to a Panasonic GX7 camera and therefore will have more examples and comments added as I get to spend more time with this combination. 


When using very long focal lengths handling is extremely important, as the slightest movement will produce at best 'soft' results and more than likely lots of shake induced motion blur. The lens is very light, works smoothly and appears well built. However no hood is supplied and as a genuine one was 80 an aftermarket one for 14 was obtained from Ebay. Anyone serious about image quality should always use a hood as it reduces the likelyhood of lens flare and also improves image contrast sharpness.

This GX7 and Olympus 75-300 combination is very light, in fact it is almost to light to use. Now that may well seem a strange thing to say - especially as most of us have chosen to use the M4/3 system for that very reason, - but there is a specific problem with using ultra long (600mm full frame equivalent) lenses hand held that are very light and that is due to the lack of mass it is very difficult not to induce camera shake. In fact at the longer end, even when bracing myself against a wall I found it extremely hard to hold steady. Fortunately the GX7 has excellent in-camera image stabilisation which works well with this lens. 

When feeling very strong I also shoot with a Sony A77 and a 70-400mm APS-C combination and except for the huge weight of that system, it is an easy combination to hold without shaking. And the reason is, it is so darn heavy that it damps out involuntary small muscle movements in our arms. So being too light can be a problem and the GX7 and Oly 75-300 is seriously light. At maximum 300mm zoom FF600mm) A monopod or tripod is definitely advised!


I have now had the chance to use the lens quite a few times and can report with confidence that this lens performs promisingly well throughout. The results obtained at the extreme long end are very good especially when set to F8, but not as 'bitingly sharp' in the same way that the Sony A77 + Sony70-400G combo mentioned above is, but frankly I would not expect it to be (and there is a massive price difference). However at the wide end 75mm and up to 250mm (equivalent to 150-500mm on a full frame) the Oly75-300 does perform extremely well indeed and right across the frame to boot - albeit best when shut down by 1 or 2 stops.

With great care the Olympus 75-300 Mk2 will also produce great shots from 250-300mm (500-600mm FF equiv.) however great care is needed and here good light to allow high shutter speeds and the GX7's fully electronic shutter helps a lot, as both these reduce any tendency to induce image softness through shutter shake or hand vibration.


In my experience with this lens so far I can confidently state that my copy at least is a keeper. I hate it when people say a lens is 'good for the money', as in my eyes a lens is either a good or a poor lens, period!

I have previously fitted some very expensive Voigtlander prime lenses to the GX7 and although the photos are definitely a little sharper than this long Olympus tele-zoom (and so they should be), I think in 95% of cases when viewing a good quality A4 size print, not many would see that difference - at least not until you zoom very close towards the 300mm end**.

I had never considered using a lens this long to do any macro photography, but when I saw a beautiful butterfly I just had to try and get a shot of it. To my surprise this lens did an amazing job, the detail of the 'fur' on the butterflies back is very sharp and with good detail (4a & 4b.). This led me to try a few more macro type subjects, but I soon found its limits. As this lens does not focus very close, I did not try and measure the minimum focus distance but found its limits when I tried to photograph a couple of mating damselflies (5a & 5b.). Ideally I needed to get much closer, however considering these insect were only around 3cms long, looking at the final result I think the lens still did a fairly decent job.

So for the sub-400 pounds currently asked for this lens in the UK, it is not only a very good lens, it is also great value. The more I use it, the more I like it!

...and for those that need to know, I am pleased to report it focuses pretty fast too, so should be excellent for a variety of wildlife and sport :o) 


In the photo examples shown, please note that images were typically taken at ISO settings between 400 and 1600 and at a variety of shutter speeds. This was not ideal, but it was typical of the situations we face when in the field. Where we have to balance noise and dynamic range against the shutter speed needed for certain situations. 

Although this test was not initially intended to be testing the GX7 camera itself, in a roundabout way it did end up that way. As using this very long Olympus tele-zoom lens forced me to push the camera very hard to get the best results and I was very impressed at the results when shooting at such high ISO and in some cases very slow shutter speed. 

I found that I had no other choice than to use small apertures on the lens (mainly F8), which was necessary to ensure that most of the subject was in focus. A 600mm (full frame equivalent) lens has a VERY shallow depth of focus. This would not be a problem when photographing aircraft or sport, but on smaller objects close by, a shallow depth of focus can be a problem.

All images were taken handheld, but I took great care to try and either brace myself against something, or to kneel on the ground to provide stability.

Please bare in mind also that at high ISO settings, images with fur and feathers tend to lose detail on all current digital cameras, but these subjects just happen to be some of the best subjects to test lenses for sharpness and of course it is one area where many people will want to use a long lens. 

** Interestingly my prime Voigtlander's seem to perform better on the original Panasonic G1 than the newer Panasonic GX7 and I have been wondering for a while now as to whether the GX7's 16Mp sensor has a stronger anti-aliasing filter fitted or whether there is some other form of processing going on, as the images it produces do often appear to be slightly softer than that of the earlier G1 which is only 12Mp! So the image sharpness from this Olympus 75-300 Mk2 lens may well improve even further when fitted to a different M4/3 camera model.

(Update - Dec.2016)

The original article above was written in 2014 and intended only as a personal evaluation of my as then new lens. Since then I have had many chances to enjoy the Olympus 75-300Mk2 and compare it against many new very expensive lenses. 

So what do I think of it now after 2 years use?

In my original article I did not cover many aspects of lens behaviour that I now value so much. After comparing it against newer and very exotic competition I can now comment on the pros and cons:

Pros: This lens is light, very light, which is a major boon for most M43 shooters. Having recently tested it on a Panasonic GX8 with a 20Mp sensor, I can also state that it is even sharper than I originally thought. And holds up really well even at the 300mm long end.

Cons: As far as I am concerned there really is only one small con and that is regarding its focus speed compared to 1,500 competition!
It is not slow to focus by any means, but it is nowhere near the speed of exotic glass and this may affect the number of 'keepers' you get - depending on what you choose to photograph.

Worst case scenario:

When trying to photograph small birds paying fleeting visits to a garden feeder recently and comparing it against the latest Panasonic 100-400 lens, I noticed that the keeper rate from this old Olympus was very poor in comparison. The camera in use was the Panasonic GX8 and with exotic glass focus was always instant, but when the Olympus 75-300mk2 was attached, the nervous birds had gone before focus was obtained in most cases. Unfortunately I have  no way of finding out whether it would focus quicker with an Olympus camera attached, it may well do.

So what about Action Sports:

I have never tried this lens on ball sports, but did get some great Roller Derby and large Birds in Flight shots with it. Also as you will see below the motorised sport shots below (from 2015) tested the GX7 and Olympus 75-300mk2 in quite demanding conditions and with both the car rally and water sports, the system kept up adequately and provided very many excellent images.

 8a. Above: Original image resized.  - Click and view a full size crop section.
 Lens: Olympus 75-300 Mk2 at 264mm (FF548mm).
 Setting: F7.1, 1/1300s, ISO400.
 Camera: Panasonic GX7 (Micro 4/3).
 8b. Below: Photo cropped to taste - Click to view larger.

The rally car photos never looked as razor sharp as I now know is possible with M43, but they did clean up quite nicely and I was pleased with the results.

The Olympus 75-300Mk2 and GX7 combination excelled when it came to photographing the Thundercats at Fistral Beach.  

 9. Cropped to taste. - Click to view the full size image downscaled to 50%.
 Lens: Olympus 75-300 Mk2 at 246mm (FF492mm).
 Setting: F7.1, 1/800s, ISO400.
 Camera: Panasonic GX7 (Micro 4/3).

Photographing a jetski competition is quite tricky as you are never sure which competitor will pull the next stunt. But as long as I was pointing the camera in the right direction the Olympus 75-300Mk2 on the GX7 had no trouble locking focus in time, allowing me to capture some super moves.

 10. Cropped to taste. - Click to view larger image.
 Lens: Olympus 75-300 Mk2 at 228mm (FF256mm).
 Setting: F7.1, 1/5000s, ISO400.
 Camera: Panasonic GX7 (Micro 4/3).


If you have a M43 camera with stabilisation and need a high quality long zoom lens which will not weigh you down, the Olympus 75-300 Mk2 lens is very capable of producing fantastic images in the right hands and is in my opinion an incredible bargain which has earned its place in my kit bag. Do bear in mind however that if you are constantly shooting in very poor light, that it is only F6.7 at the long end. But if it is not fast enough, you may have to add another 1,000 to your budget to get something faster!

My full user report of the exotic Olympus 40-150 F2.8 Pro with example photos can be found HERE.


M4/3 Olympus 75-300mm Mk2 lens.
(Unless otherwise stated all images are taken handheld with a Panasonic GX7.)


 1a. Complete image as resized to 900px.
 Lens: Olympus 75-300 Mk2 at 264mm.
 Setting: F8, 1/2500s, ISO400.
 Camera: Panasonic GX7 (Micro 4/3).
 1b. Click image below to view crop 'full size'.
Click to view full size.

 2a. Complete image resized to 900px.
 Lens: Olympus 75-300 Mk2 at 300mm.
 Setting: F8, 1/800s, ISO400.
 Camera: Panasonic GX7 (Micro 4/3).
 2b. Click image below to view crop 'full size'.
Click image to view full size.


 3a. Complete image as resized to 900px.
 Lens: Olympus 75-300 Mk2 at 234mm.
 Setting: F7,1, 1/100s, ISO1600.
 Camera: Panasonic GX7 (Micro 4/3).
 3b. Click image to view crop 'full size'.
Click to view full size.
(Note difference between RAW & JPG halves)


 4a. Complete image as resized to 900px.
 Lens: Olympus 75-300 Mk2 at 246mm.
 Setting: F8, 1/400s, ISO400.
 Camera: Panasonic GX7 (Micro 4/3).
 4b. Click image to view crop 'full size'.
Click to view full size.

 5a. Complete image as resized to 900px.
 Lens: Olympus 75-300 Mk2 at 246mm.
 Setting: F8, 1/500s, ISO800.
 Camera: Panasonic GX7 (Micro 4/3).
 5b. Click image to view crop 'full size'.
Click to view full size.


 6a. Complete image as resized to 900px.
 Lens: Olympus 75-300 Mk2 at 300mm.
 Setting: F9, 1/100s, ISO400.
 Camera: Panasonic GX7 (Micro 4/3).
 6b. Click image to view crop 'full size'.
Click to view full size.


 7a. Complete image as resized to 900px.
 Lens: Olympus 75-300 Mk2 at 300mm.
 Setting: F8, 1/800s, ISO1600.
 Camera: Panasonic GX7 (Micro 4/3).
 7b. Click image to view crop 'full size'.
Click to view full size.

Article Adrian Harris