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norman_peters

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  1. <p>Hi all. A late post. I have a good copy of the Siggy 150-500mm. I have decided that sharpness is all about technique when using this lens. It needs a rock solid support (think a heavy tripod and good ball head), as there is significant vibration nearly always present when you press the button that inevitably affects sharpness.<br> The best way to use it is either with a remote trigger, or using the self timer - this ensures that there is no IQ-killing vibration present (if it is on a solid mount, of course).<br> Remember to turn off the shake reduction when it is on a tripod. I also use it on a crop body (Canon 700D) to maximise the apparent focal length, and I always use the camera's magnified LiveView facility to focus - it is too hard just via the finder to get perfect focus. I don't use a UV filter (but sometimes a polariser) and I always use the hood as flare also kills apparent sharpness.<br> Use it racked just a bit back from 500mm to get better sharpness, and stop it down a tad - f8 seems good, but some also swear by f7.1.<br> This all suggests to me that it is just a lens that needs deliberate use of technique to get a sharp image - I wonder if all of the complaints around the web stem from user failings in this regard, and blaming the lens....<br> BTW mine is a very recent copy, so they may have picked up on quality control too. I hated Sigma a while ago because of old lens compatibility issues with Canon, but I have an 8-16mm Sigma hyper-wide lens and it is also a beauty, so I feel that they may be trying hard these days.</p> <p> </p>
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