It's been raining every time I have have had a chance to use the lens so I just have a few shots from my back door at close range.
The light has been typical that what I would be using the lens in. I tried using a fairly low ISO but I can see out in the real world I will have to use ISO 1600+ in the conditions I will be using the lens in. I was able to lean on the house taking these, which helped keep me steady.
The below are straight out of camera, no PP at all. Nothing I could post in a normal thread yet, but getting closer. With some sharpening some of the below may be usable, will check soon.
On the bird below I tried to focus on the eye. So not to scare the bird away I held the camera at waist level and used the rear screen to take the photo. I had the screen twisted so I was not looking at the bird. [I hate to admit I finally found a use for the flippy screen over my preferred tilt screen

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This first shot not very sharp.
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I think this second shot is a little sharper
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I tried a couple of Lizard shots, one of my regular subjects. Tried to focus on the eye.
This one just missed
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This shots looks a little better at a shorter focal length
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This second lizard of the same type as above was about 4 times the size [Shutter speeds quiet low as well]
First shot almost sharp
Doing a comparison here with the next shot that has slightly more exposure. The darker shot looks sharper than the second but not sure if it just because it is darker SOOC
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This second shot of the same subject above does not look as sharp, but not sure if that is just because it is more exposed.
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This last one of the same lizard as above may be usable after a bit of sharpening
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Final thoughts so far. I have quiet a few shots at short range now and I think the above sort of shows my progress so far
* It is a big difference getting a usable shots between 300 and 400. It is a lot harder at 400mm than thought it would be.
* With the G85 and 100-300 I don't really have to try that hard to get a usable shot at 300mm
* The Olympus 100-400 weight compared to the Panasonic 100-300 makes the lens far harder to use. This may be due to what I perceive as better stabilization of the Panasonic 100-300 not sure
* It is hard to judge sharpness where depth of field and exposure are not even across the photo. Not sure if it is possible for me anyway with these type of photos.
* I have seen comments that a slightly heavier lens is easier to hold still than a light one. Not so for me, and at my age age not likely to change. Maybe if you are younger....
* Using two different PC's to check sharpness gives different results, and after I post on the forum the photos look different to on my PC's before uploading.
* I probably should be using a higher ISO to get higher shutter speed but then it makes it harder to judge sharpness for me, but I cant afford something like a Topaz subscription at this time.
Anyway it has been fun trying so far, and now looking to forward trying to take some more shots at a more realistic distance where I think it will be a lot harder
