amfoto1 wrote in post #15800252
I agree with everything so far...
There are a whole host of things that can lead to image softness. It can be any of the following, or a combination of factors.
Try stopping down a little since it's broad daylight, f8 should work fine.
To get the low ISO and high shutter speed, I was keeping it wide (considering the distance). But next time I will try f7.1 or f8.
Watch your shutter speed, especially since that's not a stabilized lens. Besides the lens, the 7D (and other 18MP crop cameras) have very densely crowded sensors, which seem to be more sensitive to camera movement than less crowded sensors (your 5DIII has lesss than half the pixel sites per square mm).
So for a couple reasons you might want to keep to faster shutter speeds and shouldn't be afraid to use a higher ISO if necessary to accomplish that. In real life, with 7D ISO 800 is as clean as any lower ISO, a little noise shows in 1600, a bit more in 3200, but it can be cleaned up pretty effectively with noise reduction software. With that lens and the camera's sensitivity to movement, I'd suggest you try for 1/800 or 1/1000 at least... the faster the better.
Shutter speed for these shots was 1/1600
Micro adjust? Sure, why not. Canon recommends your target for MA be 50X the focal length, which would be about 65 feet with a 400mm lens! FoCal suggests with long telephotos that you can successfully MA with half that distance, but it's still 32 feet in this case. Setting MA with a target near the minimum focus distance is more likely to cause problems than solve them, with a telephoto lens that's used with more distanct subjects.
I see arguments and counter arguments for this distance. I took the side where it said "at 50X distance it is pretty much infinity and a minor difference will go unnoticed. But if it is close to MFD it is unforgiving and will show up the difference". May be I was wrong and need to re-do MFA at 50x or 25x. The only problem there is the target becomes so tiny to even notice any difference..
If you have a "protection" filter on the lens, remove it. You might be surprised.
I am from the school of "No filters for protection, use your hood". So no filter on this lens and all other I own.
And, yes, 7D images absolutely need a lot more sharpening than earlier, lower resolution cameras. All the other 18MP cameras, it seems like Canon didn't install as strong an anti-alias filter. But the 7D was the first of the 18MP and they kinda got carried away.
I guess that is where first impression does not come out good.
Use a monopod or a tripod (with a gimbal mount for moving subjects).
That's kinda awkward setup I need to get used to..
You will never see quite as sharp or finely detailed images with 7D or any crop camera, though, as you will with a full frame camera. That's just the nature of the beast. It's why people buy full frame cameras, after all. Your sample 7D images don't look bad, tho, probably will be just fine after some add'l sharpening and attention paid to other factors.
Thanks. I think that is where I need to learn to differentiate.
Did PP on the images in LR. Please see below.