Panasonic GH3 - Review and User Experience - Part 8 - ISO comparison with Olympus OM-D - Revisited

For my full Panasonic GH3 Review and User Experience - CLICK HERE



See previous post for more on this.

Though I said I wasn't going to do it, I decided to go back and compare the GH3 and OM-D again at ISO 3200. This time to avoid the undexposure problem I did some bracketing with the GH3 at +1/3 and + 2/3 of a stop.

This is what I got from Photoshop with identical flat processing.


If anything, now the OM-D is slightly noisier. However the Panasonic has required extra exposure to get this, so its swings and roundabouts really.

However, do you want to see something magical?

I decided to run the images through Rawker. Its a dcraw mac programme but has a built in conversion method as well. Rawker is available here. When I used the dcraw the Olympus came up fine but the Panasonic produced a pink tinged mess that was miles out. However the built in conversion produced some amazing results. First of all it handled the GH3 file fine, which is strange since the programme hasn't updated for a long time, which means that it recognises the file from an update a while ago. The last time I remember it updating was around the time the OM-D came out, so make of that what you will. As you can see from the exif data, the GH3 has required slightly more exposure to balance up with the OM-D, so this indicates that Panasonic probably have a different idea to Olympus as to what ISO 3200 actually is. This however is not unusual. If you have ever seen any DxO tests, they are always coming up with differences as to how cameras implement this.

The main thing you will notice however, is just how clean these raw conversions are. Way better than Photoshop and achieved with a programme that has no noise reduction settings whatsoever. Or at least that I can see.


100% blowups from ISO 3200. Pretty good. In fact quite incredibly good.

I guess I'm convinced that this is the same sensor with differences in each cameras processing. In any case there seems to be no advantage for either camera other than for camera jpgs. shot at identical exposures. It is however I think important to stress that to make sure you get the cleanest high results from the GH3, be very careful with the metering. If there is a tendency to underexpose then you have to be aware of that and compensate accordingly. Bracketing with some + values seems to be the way to go with this, if you have the option to do that of course.

The Rawker discovery is a bonus however. Just shows what you can come up with when you start experimenting. For more on this check out my following post - http://soundimageplus.blogspot.co.uk/2012/12/rawker-software.html

Also See previous post for more on this.

For my full Panasonic GH3 Review and User Experience - CLICK HERE

N.B. to see more on the cameras and lenses featured in this post click on the relevant labels (tags and keywords) below.

All original material on this blog is © Soundimageplus

Join the Soundimageplus Blog Readers Group at Google+

For comment and discussion - join me over at Google+