zlatko said:
It sounds like you are blaming the camera for bad technique or possibly a combination of bad techniques. A 24/1.4 has 3EV vignetting in the corners only, and only when shot at f/1.4. Where you shooting at f/1.4 and were your subjects in the very corner of the frame? If so, why? If not, then why correct for 3EV of vignetting? At f/2.8, the vignetting is just over 1EV and that's only in the corners. I would not correct that at all. At f/4, vignetting is under 1EV in the corners.
Also, vignetting is part of the look of shooting an f/1.4 prime at f/1.4. It's not something you correct, or at least not fully correct. If you don't want heavy vignetting, you *don't* shoot at f/1.4. Instead, you stop down. If there is more than one person in the frame, you stop down at least a little anyway just to be sure they are all in focus. This is not even getting into the question of why one would even choose a wide angle 24mm lens if one wants shallow depth of field.
Saving the sky and clouds usually doesn't require underexposing by 1.5 stops. Are you using Highlight Tone Priority? That saves some of the sky/cloud highlights. Are you using any fill? Use just a little bit of fill flash (or a reflector) and you are reducing the need to brighten a photo in post. One stop of brightening is usually perfectly OK, while 4.5 stops of brightening is not OK. Requiring a photo to withstand 4.5 stops of brightening in post looks to be the result of a combination of mistakes.
Finally, I wonder about the processing technique here. Was any noise reduction applied?
All of your points don't counter my concern that I find Canon's DR limiting. The point of technology is to 'get out of the way', not limit your creativity by placing constraints on your work. Sure, sometimes those constraints lead to valid solutions, but you just can't argue that having those constraints is better than not having them.
Reading your post, I'm not sure you fully appreciate the uses of fast primes. Are you suggesting I shoot f/1.4 primes at f/2.8, thereby throwing away what I consider the entire advantage of shallow DOF primes that isolate subjects to create that '3D' look? Why would I do that? If I didn't care about the f/1.4 look, I'd just shoot with the stellar 24-70 f/2.8...
Why choose a wide angle for shallow DOF? You're kidding... 24mm at f/1.4 can create a look, despite not having as shallow DOF as, say, 85/1.4, that you just can't get with slower lenses. To me, that's the entire point of f/1.4 primes. You use f/1.4 paired with your favorite focal lengths to get as much subject isolation as possible.
I will literally align people in the same plane and align myself normal to their plane so I can shoot 24mm or 35mm at f/1.4 without stopping down. I will keep shooting and re-aligning and re-shooting, checking focus across all subjects, just so I can get that 'look'. You'll note that my subject is in focus, even though that's the right extreme of the frame. Center subjects are also in focus. You can do that at f/1.4 if you know what you're doing, and still get the subject isolation of f/1.4. Because that's what I want, and so everything I said above is what I choose to do rather than stopping down.
That's what I prioritize. I'm not going to stop down b/c of vignetting and give up that look.
Furthermore, that example above is not even fully corrected vignetting - it's only set to '50' on the vignetting slider (100 is full correction). At full correction (100), it's even more hideous; but I brightened here 'to taste'.
And generally - I like vignetting. I even like shadows and blacks. It's just that there are occasions where I don't want them. And there's freedom in not having to worry about read noise.
HTP? I shoot manual, and Raw. You may wish to refresh yourself on how HTP actually works - it would've done
absolutely nothing for me here. HTP applies a different tone curve; it's not like it's some sort of non-linear hardware amplification. I define my own tone curve in processing the Raw - HTP is irrelevant.
No NR applied - but that's also my point. I wouldn't need any NR at all with my D810. And you do realize that NR comes at a detail cost, right?
I use reflectors, and off-camera flash and umbrellas and soft boxes and all - when I definitely want those looks. But there are times even outside of landscapes that I run into Canon's read noise, and I'm just saying that there are real alternatives that have existed for years that circumvent this entire issue.
Most of you have valid points; it's just that my point is also valid - that it's limiting. Arguing against that is just, well, perplexing.