johnnymg Offline Upload & Sell: Off
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p.2 #7 · D2X can't do ISO 800? | |
jacko wrote:
For sure, the RGB histo is one superb feature to have. When the season is right, I shoot a lot of flowers, and it used to drive me crazy on the D100 because my red's would blow. But, anyhoo....
IMO, it's not a sin to blow a highlight, especially if they're specular. But, to avoid the wrath of digital shooters, you just try to avoid it 
Seriously though, some cameras will show "blinkies" when in reality the highlights are not truly blown. The reason is, somebody, somewhere, established an RGB value for the blinkies to turn on, and on most cameras, it's not RGB 255, but some lesser value. It could be 249 or something like that, but I almost guarantee it's not 255. The fun part is figuring out where it really clips.
For example, I have an exposure that's "perfect", except the histo tells me I can go further to the right. But, I bump EV up by a third stop, and the blinkies come on. Usually I can easily recover that 'lost' highlight. One of the reasons is, it's probably the red channel that's blown, or maybe the green, but rarely is it all three channels. And usually, since it's a highlight, you're not going to see a lot of color there anyway. It's not really as wild and uncontrolled as it sounds and once you get used to it, it's easy to see/do. The other side of the coin is, if I'm trying to maintain color fidelity, I'll come closer to underexposing, but that's probably a whole 'nuther thread....Show more →
Jack
Thanks for the clarification.
The blown reds I've seen were in pics of red roses. When that happened (almost always............ hahaha) the tonality of the rose pedals was really 'muddy'. . I eventually 'gave up' on the D70 histogram when shotting reds.
Anyway, I'm just starting to play with the RGB histogram on the D200 so I've got plenty of experimentation to go before I 'get it'.
Regards
JohnG
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