Chief Cammanda II

[Dave A]

While in North Bay I was hoping to get a picture of the Chief still in the water and docked but it had already been pulled out.
Guess all this warm weather has thrown off my timing as it just doesn't feel like December.

Dave

[Dave Humphries]

I'll give you two things on this Dave,

There is significant lateral Chromatic Aberration which you have not fixed (in LR)

Compositionally (as with Tractor), when shooting, it's always 'nice' to have more space 'in front' of an object than 'behind' it. If that's not possible, or forgotten, when shooting, then crop in PP is usually possible.

Is this particular vessel a celebrity in your locale?
I do quite like her lines.

HTH, Dave

[chauncey]

Aah, Dave...I'm not seeing that Chromatic Aberration on my monitor in IE browser.

[Dave A]

Thanks Dave for the pointers. There is an ugly cement block building at the front so I cropped most of it out. I should of also cropped the back too. I didn't zoom in enough to notice the CA but will have another look.

Dave

[Dave Humphries]

Aah, Dave...I'm not seeing that Chromatic Aberration on my monitor in IE browser.

Try using LyteBox to show at 100% (this is almost essential), then observe the trunks of the silver birch trees at left edge of picture (Lat-CA is always going to be at its worst at the very edges of frame), see how they are coloured 'red' one side and 'green' the other?

I am using FireFox, but I doubt that's making a difference - nope, just tried IE and it is there too.

[Dave Humphries]

I didn't zoom in enough to notice the CA but will have another look.

I always leave the CA correction turned on (I use ACR) - I've yet to find the downside to this - then I don't have to remember.

[chauncey]

Yeah, okay...I see it now.

[Sam W]

Hi Dave,

Nice colorful photo. I'm seeing some repeating dark areas in the sky on either side of the central pine trees. Not a big deal, still a great photo. Best regards - Sam

[Manfred M]

Thanks Dave for the pointers. There is an ugly cement block building at the front so I cropped most of it out. I should of also cropped the back too. I didn't zoom in enough to notice the CA but will have another look.

Dave

Dave has excellent eyes for CA (and has pointed it out in some of my postings too). In this shot, I see it too, also in Lightbox.

[Dave Humphries]

Dave has excellent eyes for CA

That's because - in an earlier life - back when colour TV cameras had separate red, green and blue plumbicon tubes (not CCD) as sensors, arranged around a dichroic prism assembly, I was trained and had a few years experience correcting such 'registration' errors.

Then we got CCD sensors (that didn't wear out and hence need replacing during the life of the camera), so the registration process became a one off operation carried out on the production line, under computer control and the whole CCD and dichroic block assembly was fitted in one (very expensive) lump to the camera.


Also as an engineer, those early large CRT monitors required their triad arranged R, G & B electron guns to be 'converged' to produce a picture without these kind of errors - well, I say 'without', what I really mean is 'with them minimised and equalised across the image', so that no single area had really bad errors apparent.

Do that for a few years and your eyes spot CA in a blink, it being very similar


I still shudder at seeing CA on broadcast TV pictures today, given the removal of those other errors, we can now see the CA, especially when compact lenses of vast zoom range are used.