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<blockquote data-quote="jim.londos" data-source="post: 138571" data-attributes="member: 13790">Hi Dave,what you say makes sense, of course. The picture, when taken, doesn't seem to be underexposed at the end. Rightly put.Still, the question remains:1. Why doesn't this happen using A or S ? As mentioned above, in both cases, the parameters used by <a href="http://nikonites.com/products/dslr-3/d5100-204/" target="_blank">D5100</a> are the same with or without flash: f/1.8 - 1/125 - ISO 1250. In P I am getting f/1.8 - 1/125 - ISO 1250 without flash and f/7.1 - 1/125 - ISO 3200 - underexposure indication with flash.2. What kind of logic lies behind narrowing the aperture and increasing the sensitivity, leading to more noise, while other models (e.g. D90) keep the aperture wide and the sensitivity low? I mean, low noise and wide aperture is one of the reasons of using a fast lens after all, right?</blockquote>

[QUOTE="jim.londos, post: 138571, member: 13790"] Hi Dave, what you say makes sense, of course. The picture, when taken, doesn't seem to be underexposed at the end. Rightly put. Still, the question remains: 1. Why doesn't this happen using [COLOR=#000000]A or S ? As mentioned above, in both cases, the parameters used by [/COLOR][URL="http://nikonites.com/products/dslr-3/d5100-204/"]D5100[/URL][COLOR=#000000] are the same with or without flash: f/1.8 - 1/125 - [/COLOR]ISO[COLOR=#000000] 1250. In P I am getting f/1.8 - 1/125 - [/COLOR]ISO[COLOR=#000000] 1250 without flash and f/7.1 - 1/125 - [/COLOR]ISO[COLOR=#000000] 3200 - underexposure indication with flash.[/COLOR][COLOR=#000000] 2. What kind of logic lies behind narrowing the aperture and increasing the sensitivity, leading to more noise, while other models (e.g. D90) keep the aperture wide and the sensitivity low? I mean, low noise and wide aperture is one of the reasons of using a fast lens after all, right? [/COLOR] [/QUOTE]

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