| Joined: | Thu Apr 19th, 2012 |
| Location: | United Kingdom |
| Posts: | 4435 |
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I had taken to bracketing exposures when shooting kitchens. The diverse lighting from atriums to large patio doors mixed with contrasts fittings mean I either had to hide strobes everywhere to light dark voids ....or bracket and overlay exposures to fill in the dark holes. So lately, being quicker at photoshop than setting up lighting, I have adopted the overlay approach.
To do this, I needed and used a sturdy tripod, to ensure fidelity of positioning.
But here's the rub, as they say....
Yesterday, I needed to clone out some spurious wall light cabling ( kitchen not quite finished) and had to zoom right into background detail to match up some awkward shadows. I then noticed that the detail at that level wasn't as sharp as I expected. Zoomed out the images look sharp and good....but down at 1000% blow up I wasn't so sure.
When I compared the first set of bracketed images with the 'set up' images I was surprised to see that there was even more detail in the set up images.
The answer must be mirror rattle? Yes I know about mirror lock...but it slows up multiple shooting situations.
The initial single shot setup images were immaculate. The 3burst bracket shots were, albeit minimally, inferior.
Despite being mounted (or maybe because!) on a heavy rigid tripod I suspect that mirror vibration was being amplified through the 3images burst. This is borne out by the first shot in the sequence being better than the other two....although exposure could account for some of this.
Something I had never considered. Fortunately the visual difference isn't apparent till you zoom right into 'bottles on the far shelves' .....but an erudite lesson how it's easy to compromise your efforts.
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Eric