Very Short ExposuresĮxposures that seem impossibly brief can reveal a world we didn't know existed. The sections that follow explain your camera's special exposure features, and even discuss a few it does not have (and why it doesn't). There are options that let you control when the exposure is made, or even how to make an exposure that's out of the ordinary in terms of length (time or bulb exposures). You'll want to know about the kind of exposure settings that are available to you with the Canon Digital Rebel XTi. In Chapter 4, you learned techniques for getting the right exposure, but I haven't explained all your exposure options just yet. In this chapter, I'm going to show you how to work with some additional exposure options, use the automatic and manual focusing controls available with the Canon EOS Digital Rebel XTi, and explain some of the many ways you can fine-tune your images with optimized white balance, sharpening, tonal values, and color. Just being real patient and holding out for now.Now that you have a good understanding of exposure under your belt, you'll want to master some of the other techniques that can contribute to great images. Since I was not one of the few, that moved me on to the XTi.īelieve me, I will be back to the Nikon camp before long. BUT, there was one or two people noting very good results too. Well, about the D40, I owned one for only a month and I think the IQ was better than the D50 but mine had Amp Glow in the 4 minute range which was what I heard others seeing. Nikon has volleyed back with the D3 and D300 but the jury is still out yet on those in my mind and I think Canon's expertise with the CMOS sensor will not be immediately overcome in a price range that works for me quite yet. Very impressive to say the least plus Live View. Well, the 40D has the same level of performance as the XTi so I replaced the XTi with the 40D. ![]() This was a break through to me from Canon. I did finally break down and buy an XTi due to the virtual elimination of Amp Noise. It had equal, if not lower amp noise up past 7 minutes (ones that I owned) and takes fabulous photos to this day. ![]() ![]() The D50 is one of the best astro cams during the 6 and 8 MP camera years. I am a Nikon user, too, and have purchased Canon in the mean time but still have my Nikon lenses and gear. I'm not saying you should stay away from the Canon, but a Nikon will do a great job for astro as well. It really all depends on the model you get. I know a guy with a Canon DSLR that has much worse amp glow problems than me. ![]() Also, the amp glow on the D40 camera that I have is very minimal. I've never done this "turn off the camera" trick with mine and I produce great images, two of my best being the flame nebula and the dumbell nebula. I've heard about some of the possible wierd things Nikon cameras do before recording the raw data, but unless someone can show me a marked major difference between two similar cameras from each brand, I don't think it's worth worrying about too much. You want larger pixels (which means fewer pixels for same-sized chips) for astro, and you can still make stunning prints with 6.1MP.Ĭarl M makes it sound as if Nikon cameras are horrible for AP. I have a Nikon D40, which I think is a better choice than the D40x for astro because it has only 6.1MP rather than the 10MP of the D40x.
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