Re: Sigma 170-500

On 9/30/2015 1:13 PM, Daniel J. Matyola wrote: One can obtain a 500 mm lens for Pentax digital cameras for only $120 http://www.amazon.com/Opteka-Telephoto-Mirror-Digital-Cameras/dp/B0022VFDZW/ref=sr_1_3?s=photo=UTF8=1443632940=1-3=pentax+500+mm+lens Who is "Opteka" anyway?

Re: Sigma 170-500

30, 2015 9:39:23 AM Subject: Re: Sigma 170-500 Best image of a thing-a-ma-jig or watcha-ma-callit I've seen today ! -Original Message- From: Collin B <coll...@brendemuehl.net> Subject: Sigma 170-500 Just picked one up a couple of days ago. Couldn't shoot yesterday b/c of the r

Re: Sigma 170-500

Daniel J. Matyola wrote: > One can obtain a 500 mm lens for Pentax digital cameras for only $120 > > http://www.amazon.com/Opteka-Telephoto-Mirror-Digital-Cameras/dp/B0022VFDZW/ref=sr_1_3?s=photo=UTF8=1443632940=1-3=pentax+500+mm+lens Ad claims it fits 645D too. -- PDML

Re: Sigma 170-500

On 9/30/2015 2:01 PM, Sandy Harris wrote: Daniel J. Matyola wrote: One can obtain a 500 mm lens for Pentax digital cameras for only $120 http://www.amazon.com/Opteka-Telephoto-Mirror-Digital-Cameras/dp/B0022VFDZW/ref=sr_1_3?s=photo=UTF8=1443632940=1-3=pentax+500+mm+lens

Re: Sigma 170-500

On 9/30/2015 2:02 PM, P.J. Alling wrote: On 9/30/2015 2:01 PM, Sandy Harris wrote: Daniel J. Matyola wrote: One can obtain a 500 mm lens for Pentax digital cameras for only $120

Sigma 170-500

Just picked one up a couple of days ago. Couldn't shoot yesterday b/c of the rain. Shot some hand-held at 500mm just a bit ago. This is a pretty decent zoom lens. Though it is APO, at both 170mm & 500mm there is some fringing. I expect that from a zoom. Still, it resolves a great deal more

Re: Sigma 170-500

Best image of a thing-a-ma-jig or watcha-ma-callit I've seen today ! -Original Message- >From: Collin B <coll...@brendemuehl.net> >Subject: Sigma 170-500 > >Just picked one up a couple of days ago. Couldn't shoot yesterday b/c of >the rain. >Shot some hand-held

Re: Sigma 170-500

Collin B wrote: > It's also a bit on the slow side, but at the price of a fast lens in this > length (is there one) I can live with that as well. There is at least one for some mounts, dunno about Pentax. At over $20K and 20 kg, it seems a bit much:

Re: Sigma 170-500

"Pretty decent." I'll say, Collin! Thanks for the look! J - Original Message - From: "Collin B" <coll...@brendemuehl.net> To: "PDML" <pdml@pdml.net> Sent: Wednesday, September 30, 2015 7:39:04 AM Subject: Sigma 170-500 Just picked one up a cou

Re: Sigma 170-500

Ken, I'm certain sure that one of those is a do-dad. J - Original Message - From: "Ken Waller" <kwal...@peoplepc.com> To: "Pentax-Discuss Mail List" <pdml@pdml.net> Sent: Wednesday, September 30, 2015 9:39:23 AM Subject: Re: Sigma 170-500 Best image

Re: Sigma 170-500

One can obtain a 500 mm lens for Pentax digital cameras for only $120 http://www.amazon.com/Opteka-Telephoto-Mirror-Digital-Cameras/dp/B0022VFDZW/ref=sr_1_3?s=photo=UTF8=1443632940=1-3=pentax+500+mm+lens Who is "Opteka" anyway? Dan Matyola http://www.pentaxphotogallery.com/danieljmatyola On

Re: Sigma 170-500 APO

The two low points for the lens is the slow max aperture and the length it extends when zoomed. It is not a lens that can be used handheld (over 300mm), nor is it very useful for sporting events (due to the speed). I find that I get more use from my APO 300/F4. When I need the extra

Sigma 170-500 APO

Anyone have this lens mounted to their AF body...ideally a *istD? Feedback? Thanks in advance! == Brian Dipert Senior Technical Editor: Mass Storage, Multimedia (audio, displays, 2-D and 3-D graphics, and still and video imaging), PCs and Peripherals EDN Magazine:

Re: Sigma 170-500 APO

Nikon version. Not bad, but i only have a few test shots. As suspected a tad soft at 500,but i'm impressed. Dave Anyone have this lens mounted to their AF body...ideally a *istD? Feedback? Thanks in advance! == Brian Dipert

Re: Sigma 170-500 APO

Brian, I have this lens in Pentax mount. Overall it is an OK performer. AF speed is average compared to others that I use with my *istD. Sharpness is pretty good at one or two stops down. It is best at mid range (250-400mm), just as you would expect with a zoom. The two low points for the

Re: Sigma 170-500 APO

As a follow up to my comments. Here are two examples from the *istD with the Sigma APO 170-500. Warning! Warning! Warning! These are full 6.1MP images straight out of the camera. Shot jpeg iso 800. EXIF intact. They are each over 2Mb. They are not retouched at all. No sharpening, so they will

Re: Sigma 170-500 (Was: Lens Tripod Mount)

A very silly design, slow and totally impractical. Optically it was mediocre at best, and at most apertures and focal lengths absolutely awful. An alternative is the manual focus Tokina AT-X 150-500/5.6. Mechanically it is a very nicely operating one-touch zoom lens, very similar to the other

quality of sigma 170-500?

Hi, has anyone tried the Sigma 170-500 zoom. How is it's quality compared to the fixed 300 f4 or 400 f5.6 Pentax lenses. I'm considering getting an ultra-telelens but I'm not sure what will be the most versatile focal length. 170-500 zoom would therefore be great. Frank - This message is from

Re: quality of sigma 170-500?

Frank Wajer wrote: Hi, has anyone tried the Sigma 170-500 zoom. How is it's quality compared to the fixed 300 f4 or 400 f5.6 Pentax lenses. I'm considering getting an ultra-telelens but I'm not sure what will be the most versatile focal length. 170-500 zoom would therefore be great