Re: Testing the sigma 20/1.8 a few galleries of test, snapshots

From: Larry Colen On Dec 15, 2009, at 3:59 PM, Mark Roberts wrote: > On 12/15/09 4:29 PM, Carlos R wrote: >> >> you must be sure you >> disengage AF by using both the camera AF/MF switch and also by >> pushing >> the focusing ring on the lens towards the camera body, as, >> unfortunately, t

Re: Testing the sigma 20/1.8 a few galleries of test snapshots

On Dec 15, 2009, at 3:59 PM, Mark Roberts wrote: On 12/15/09 4:29 PM, Carlos R wrote: you must be sure you disengage AF by using both the camera AF/MF switch and also by pushing the focusing ring on the lens towards the camera body, as, unfortunately, these Sigma lenses can't deactivate th

Re: Testing the sigma 20/1.8 a few galleries of test snapshots

On 12/15/09 4:29 PM, Carlos R wrote: you must be sure you disengage AF by using both the camera AF/MF switch and also by pushing the focusing ring on the lens towards the camera body, as, unfortunately, these Sigma lenses can't deactivate the AF motor in the camera body only by using the lens cl

Re: Testing the sigma 20/1.8 a few galleries of test snapshots

Larry Colen escribió: Because the manual focus on it feels horrible. It's "lumpy" getting stiff with every rotation of the auto focus drive screw, then loose on the other half. This also sort of makes it tough to focus accurately if the focus point is where it doesn't want to turn. If th

Re: Testing the sigma 20/1.8 a few galleries of test snapshots

On Dec 15, 2009, at 5:19 AM, Miserere wrote: Larry, I see nothing wrong with your test pics. Why is it exactly that you want to return the lens or send it to Sigma? Because the manual focus on it feels horrible. It's "lumpy" getting stiff with every rotation of the auto focus drive screw,

Re: Testing the sigma 20/1.8 a few galleries of test snapshots

Larry, I see nothing wrong with your test pics. Why is it exactly that you want to return the lens or send it to Sigma? BTW, I really like the close-focus feature of my Sigma 24mm. I don't know why most non-macro Pentax lenses don't focus closer than they do; I like to get in really close with my

Testing the sigma 20/1.8 a few galleries of test snapshots

I've been putting the Sigma 20/1.8 through its paces today. I need to decide whether to return it, exchange it at 47st, or send it to Sigma for repair. Optically, I have no complaints. There are undoubtably sharper lenses of about this length, but there aren't many faster, at least not at