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Rebel xsi canon astrophotography software iso#
Rebel xsi canon astrophotography software plus#

We were actually surprised when we constructed this scene just how dark the velvet and sides of the beer bottles ended up being.

The bottoms of the beer bottles also provide some gradations of deep shadow, and the clump of peppers in the bottom of the pepper oil bottle had a fair bit of detail that's far down at the shadow end of the tone curve.

Shadow Detail: Several elements of this subject are useful for evaluating shadow detail, particularly the black mug and the pieces of folded black velvet, both under and inside the mug.

These fibers are unusually bright and reflective, so its easy for a camera to blow out detail in them. As it turns out though, the most sensitive test of a camera's highlight abilities seems to be the hank of white embroidery thread in the upper right corner. The folded white cloth under the mug on the right side of the frame likewise shows a lot of white-on-white detail that is easy to lose, particularly if a camera's tone curve is too contrasty. As mentioned above, the salt grains (and reflections of the studio lights) in the salt mill are examples of fairly subtle highlight detail that cameras' anti-noise processing sometimes obliterate.

Highlight Detail: Three elements in this scene show off (or show up) a camera's ability to hold onto highlight detail.

There's also a nice range of fine text sizes in this chart as well, once again great visual cues for resolution and detail. Looking at results from many different cameras with this target, we found that camera noise-suppression systems often confuse the fine lines with image noise, and so flatten them out. Some of the fine lines there are extremely fine indeed. Fine text is often a good visual indicator of resolution, because our brains have an excellent idea of what the text should look like, so are very quick to notice even minor loss of detail.įor really fine detail, look to the circular scale/calculator on the right side of the scene.

Fine Detail: You'll find a lot of fine detail in the label of the beer bottle on the right, in its fine cursive text, but the other bottle labels hold a lot of fine detail as well.

Rebel xsi canon astrophotography software iso#

Cameras are often more conservative about suppressing noise in highlight areas (because our eyes tend to see less of it there), but many cameras seem to have a hard time holding onto the subtle shadings that distinguish the salt grains from each other, particularly at higher ISO levels. Cameras with really high-quality, low-noise sensors that require little noise suppression will be able to hold onto the detail in these areas, many others will show only a uniform swath of smudged color.Īnother place where you'll quickly see the effects of over-aggressive noise suppression is in the white salt grains of the salt grinder in lower left. The dark colors in the background and in the figure's clothes contain detail that's very quickly lost when a camera's noise suppression system kicks in. The label of the vinegar bottle (second from the right) is another great place to look for lost detail from noise suppression, as the image of the person at the top of the label is actually a depiction of a mosaic. The white and tan swatches and the dark swatches tend to be particularly revealing of this. If you look at the detail in these swatches as the ISO increases, you'll see just where different cameras start to lose subtle detail. This is just the sort of detail that noise suppression processing tends to flatten out.

Tone-on-tone detail & noise suppression: The cloth swatches in the pinwheel were chosen because they show a lot of tone-on-tone detail, across a broad range of colors.

Rebel xsi canon astrophotography software plus#

We're combining some of the elements from previous shots (DaveBox and Res Chart) into this and the "Multi Target" shot below, plus added a number of elements that are very revealing of various camera characteristics and foibles. This is our new "Still Life" test target. Your own eyes decide which you like best! To compare images from the Canon EOS XSi (Rebel XSi, Canon 450D) with those from otherĬameras you may be considering.

Not sure which camera to buy? Let your eyes be the ultimate judge! Digital Cameras - Canon EOS XSi (Rebel XSi, Canon 450D) Test Images