Slains Castle

by pakman

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Some lenes perform better on either of it's ends. Another root of your problem might be this: on the wider end, your lens's aperture is wider. This let's it capture more light, but also enhances the lens blur. Vice versa, on the longer end aperture is narrower, which "hides" the blur.


For highest image quality the two prime lenses beat the zoom. Here's a side by side comparison of the Tamron 24-70 set at 50mm and f/2.8 with the Sigma 50mm f/1.4 Art set at f/2.8. Both are Canon versions of the lens mounted on an EOS 1Ds Mark III which is a 21MP Full Frame camera. The 50mm prime is noticeably sharper at all common apertures, especially ...


The cameras are very different in technology and design, so the basic answer is "it depends". There are two fundamental differences.... maybe three. Let's call it three: Your Canon 1000D is an interchangeable lens camera. You may only have one lens (and if so, probably a 18-55mm "kit zoom"), but you have the option of adding literally hundreds of other ...


In my case, because I do star imaging, we too use FOV instead of magnification. Basing on the formula 57.3 x sensor dimension / true focal length to derive the FOV, you'd get 57.3 x 13.2 / 146 = 5.2° which would make it narrower than that of the binos' 6.1°. However, if you must stick to magnification, in the old 35mm film days, 50mm was considered the ...

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