On the newer rebels, XS, XSi, T1i, T2i, it is a 4 digit number. With the 16gig card I use on the XSi, I can shoot about 1000 full resolution raw format images. If I change that to the largest resolution jpg, it reads 3378. That does make more sense. The "burst" mode is only a few frames at a time, and really depends on which resolution you are at. It can do a lot more low rez .jpg's in a burst than full raw format. They are handy without laptop's, but are very handy with them as well. With the EOS utility, you can fully automate your shooting. I can setup an astro session, and go nap for a few hours. Here are some dark frame comparisons done by Gary Honis showing the 450D(XSi) the 1000D(XS) and the 550D(T2i): http://ghonis2.ho8.com/RebelMod550D/rebelmod550dcompare.html You can clearly see that even with the digic3 processor, the noise levels hold their own with this camera. 450D is a great astro camera, and all around general purpose DSLR. David On 10/30/2010 11:02 PM, daniel turner wrote:
Kurt:
I fear you are mistaken about the 4 shot limit. That sounds like the limit on the number of rapid fire shots that can be taken before the camera has to slow down and wait for the memory card to catch up. It varies with model and with options in use at the time.
The true shot left counter is a three digit number and depending on the model, card size and resolution can often be seen at 999 which means "more than a thousand". So you can shoot all night or all week if you wish and download at your leasure later.
Newer models have a "live view" mode that allows you to focus without the aid of laptop software.
I use a DSLR to avoid having to take a computer to the field with me. It contains everything needed to do the job on it's own and it greatly simplifies the process.
DT
--- On Sat, 10/30/10, Canopus56<canopus56@yahoo.com> wrote:
From: Canopus56<canopus56@yahoo.com> Subject: [Utah-astronomy] Purchase advice on Canon Digital Rebel XS, XSi To: "Utah Astronomy List Serv"<utah-astronomy@mailman.xmission.com> Date: Saturday, October 30, 2010, 6:17 PM I am getting ready to buy my first DSLR and I would like to buy a Rebel XS or XSi. This would be a general purpose camera but I want to cross-purpose it as an astronomy camera. I feel the cheaper XS model meets my needs.
I am unclear on:
1) For time lapse night time photography of a large sky section with the 15mm lens, how do you get the images off the camera in real time since it only holds 4 shots?
2) Other advice of comments are the purchase are welcome.
Thanks - Kurt
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