You may need to refocus your subject as the temperature changes throughout the night. Magical images, great AF, great close focusing abilities. Using a Canon EF 24-105mm Lens for Astrophotography - AstroBackyard This creates an effective focal length of roughly 200mm, a useful magnification for a wide variety of astro-imaging scenarios. Orion's Belt : r/astrophotography - reddit.com Excellent color and saturation, a virtually perfect lens. We've combed through the options and selected our two favorite cameras in this class. Before I go any further, Id like to share a photo from Gabriel Millou of the Andromeda Galaxy using a Canon 1300D. The shot of the cat could certainly be improved through cropping, though. Very sharp even at f2, build quality, price, weight, autofocus is fast, bokeh, No IS, flare, autofocus isn't quite as consistent as some newer lenses, focus speed, image quality, predictability, Image quality, build like a tank, focus ring, weight. The 135 f/2 is not perfect. It has no chromatic aberration, and no hint of star deformities in the corners. Adam007,"a headshot is exactly where I want to see all those megapixels"No thanks. I typically shoot with Canon lenses, but the potential for low light photography (whether thats astrophotography or the ability to film at dusk) caught my interest. CAs: a little in the OOF area - not disturbing anyway. No rubber sealing against the camera body tend to give me the creeps when shooting in the wet. We sell a wide variety of digital cameras from all the top brands like Canon, Nikon, Sony, Panasonic, Olympus, Fujifilm, Pentax, Leica, Samsung, and more. Reg. If you want the best possible image quality, and you must have autofocus, and you don't care if it is a bit heavy (maybe you need it for studio use), buy the Sigma. Definetely the most sharpest lens which I have ever seen. Only con I can think of, and that may be a big one depending on how you plan to use the lens is the lack of weather sealing.

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