Noise and artefacts and me being a numpty.

[Simpo Two]

My 4p:

1 - Tower: Sky is about a stop underexposed, the foreground naturally more but that's the nature of the shot. You should be able to crank up the foreground top a decent level without too much problem. And rotate clockwise to get it vertical.

2 - Helicopter: Possibly two stops underexposed. The helicopter is darker than the sky but that's the catch with many airshow photos. You could do something cunning with RAW but we'll save that for another time.

3 - Vulcan: Could try some curves to lighten without overdoing the highlights but otherwise OK IMHO.

4 - Swan: Nice photo, perfect focus, also the highlights, but I'd apply some curves to get the rest a bit lighter. And crop/clone out the elephant's leg top right.

At the size shown I see no problem with noise or focus.

[andy-xr]

jmorgan said:

I did mean to do that.
https://www.flickr.com/gp/400se/BB1NYN 15-85mm
https://www.flickr.com/gp/400se/1ts3WW 17-300
https://www.flickr.com/gp/400se/xu95A5 this one niggled me when compared to others from the show, as did the helicopter.
https://www.flickr.com/gp/400se/727H53 This one I thought was OK.

They are private but should link OK I think?

Not sure that works but it is an example.
.

Perfect!

They're under exposed on the whole, you could go easily a stop higher if you wanted to and still recover everything. I think the meter is fooling you, or actually, it's doing what it's programmed to do but probably needs a bit more intervention based on the amount of exposure and contrast in the scene.


In the first one, the camera's going to look at the clouds and think 'fking lovely, bit of white and grey, I'll use that thanks, balls to everything else' to set the exposure value. You're using centre weighted average metering in aperture priority, so based on your choice of F/8 and ISO 160, the camera's thought it'd set 1/800th as a good guess. I think 1/400 or 1/250 might still have worked. Or, what would have gone down well there would have been this setting change:

Exposure Bias - 0 EV

Knock it up to +0.7 and you'd be fine. The clouds might have taken a little hit but that's recoverable.

I dont see much noise if I'm honest, but I think the noise has come in when you've edited them, typically you can pull back a stop and a bit of highlights easily enough, but pulling up the shadows pulls up twice as much noise, so while it might not be in the unedited ones, you might find that you're pulling up a lot of shadow noise instead. At 2048px version I'm still not seeing a massive amount of artifact/noise (ETA - I typically get that when doing a quick resize job on Irfanview, it's fairly brutal and Image/Resize/ and convert to sRGB rather than save for web works best for me)

Edited by andy-xr on Tuesday 11th August 10:47

[jmorgan]

Right. So the correctly (or near as damn it) is OK, and I am seeing what is not there in the others other than underexposed but need to address exposure. I should never have looked on the net and got myself in a tiz.


Edit. Heck, reviewing the data, I had auto ISO on the airshow shots. Did not do that on purpose.

Edited by jmorgan on Tuesday 11th August 12:41

[Simpo Two]

jmorgan said:

Edit. Heck, reviewing the data, I had auto ISO on the airshow shots. Did not do that on purpose.

Ah yes, the AutoNoise feature. It catches many out and did enter my head, but went out again when you said:

jmorgan said:

I noticed that I am seeing noise... at low ISO (100).

So what ISO were they actually at?

[Simpo Two]

I shouldn't but I can't help it...

[jmorgan]

Oh my giddy aunt. Just sorted on ISO for the airshow. Most are 100, some are higher. Some are set to Auto, the dial has auto as the next step and I must have had my greasy little mitts on it messing with the new toy and cocked it up rushing for that killer make me a million shot (not that I think I am that good ). The mode dial has shifted in the past without me noticing. So I also need to check again in the viewfinder and not crack on.


Need a smily for booting ones self up the nether regions. But the Pink tower was one concerning me as were a few others with the sky.


Drat.

[Simpo Two]

jmorgan said:

the dial has auto as the next step and I must have had my greasy little mitts on it messing with the new toy and cocked it up rushing for that killer make me a million shot (not that I think I am that good ). The mode dial has shifted in the past without me noticing. So I also need to check again in the viewfinder and not crack on.

If it helps, last month I happened to catch the Martin Mars water bomber doing a test drop - and turned the EV up to +2.5 for some reason that defies explanation...

[jmorgan]

As an old gaffer used to say "not the first and will not be the last"

However I do have quite a few at 100 that I am not happy (and delete anything now that does not look right). However the helpful people here have given me a direction. But I was right, it was me.

[Ken Figenus]

Funnily enough was thinking how bloody noisy and ropey my 'lovely' ISO 100 5616x3744 30Mb CR2 shots were from the weekend - but only when zoomed right in. These are huge RAW source images from a 5DMkii with a lovely 24-70L lens - but when you zoom in 315% they look utter ste! However we zoom back out and its all good! HTH

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