Re: Pentax 70-210 and Sigma 70-300 Apo comparison([EMAIL PROTECTED])
Hi I've owned several variations of the Sigma 70-300, DL, APO Macro, APO Macro Super etc. all were soft at the edge of the frame at 300mm and CA is evident, unlike some of the better APO (EX)lenses where CA's are negligible. IIRC the F70-210 performed better at 200mm than any Sigma I tried in the 70-300 range. IOM the Tamron is a far better lens optically, I'm sorry I waited so long before trying one myself, it remains to be seen if the DA 55-300 is better than the Tamron optically. Regards, John On Tue, 06 May 2008 17:31:24 +0200, Andreas Pfotenhauer wrote > heard that rumor several times but never actually saw one that had > that softness at the long end. so it seems i gut lucky. The Tamron > AFAIK is a fine lense if you dont mind some CA's > > The Sigma is so weak at the long end that (in the sample I had) images > > appeared out of focus. > > > > People usually recommend Tamron's version of the same telezoom. But both > > will be outperformed by Pentax's forthcoming DA 55-300 and DA* 60-250 F4. > > > > The SMC F 70-210 is quite good, but I haven't tried it on the K20D's sensor. > > > > Joe > > > > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above > and follow the directions. The information transmitted is intended only for the person to whom it is addressed and may contain confidential and/or privileged material. If you have received an email in error please notify Carmel College on [EMAIL PROTECTED] then delete all copies of it from your systems. Although Carmel College scans incoming and outgoing emails and email attachments for viruses we cannot guarantee a communication to be free of all viruses nor accept any responsibility for viruses. Although Carmel College monitors incoming and outgoing emails for inappropriate content, the college cannot be held responsible for the views or expressions of the author. The views expressed may not necessarily be those of Carmel College and Carmel College cannot be held responsible for any loss or injury resulting from the contents of a message. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pentax 70-210 and Sigma 70-300 Apo comparison ([EMAIL PROTECTED])
Man on a mission! Regards, John On Tue, 06 May 2008 10:56:49 -0400, P. J. Alling wrote > A former member of the group John Hargrave, now deceased, repaired > his 70-210 with this fault, it seems to be fairly common, my first > one developed the same problem. You can see the root cause in the > third picture down in this link. > > http://members.shaw.ca/hargravep/70-210.htm > > If you don't know exactly what you're doing when you try to effect > the repair you will mangle the "information brush" which is now made > of unobtainium. > > When mine failed both screws came loose and the information brush > was mangled before I tried to repair it. > > I still have the lens if anyone wants it they can have it for $50.00 > > (I'll pay the postage in the US), KEH in Atlanta thinks they can > repair it, (I got a quote from them for $100). The combined price > is still less than these go for on ebay. When I was checking a few > months ago one sold for almost $400, the cheapest price I saw was > about $200. > > I bought a "new" one for considerably less. > > John Whittingham wrote: > > I've heard rumour of the weak point, is it electronic? > > > > Regards, > > > > John > > > > On Tue, 06 May 2008 08:34:08 -0400, P. J. Alling wrote > > > >> I can't say much about the Sigma, but the F 70-210 4~5.6 produces > >> about the sharpest pictures I get from any zoom I own, except for > >> maybe the Fa 20-35. It's also built like a tank, (with one > >> significant internal weak point unfortunately). > >> > >> Gaetan Beauchamp wrote: > >> > >>> Hello everyone! I would like to know how a Pentax 70-210mm qualifiy by > >>> comparison to a Sigma 70-300 Apo for Pentax? Any ideas? Thank you all. > >>> Gaetan B. > >>> > >>> > >>> > >>> > >> -- > >> Vote for Cthulhu. Why settle for a lesser evil... > >>-- Dr. Jerry Pournelle > >> > >> -- > >> PDML Pentax-Discuss Mail List > >> PDML@pdml.net > >> http://pdml.net/mailman/listinfo/pdml_pdml.net > >> to UNSUBSCRIBE from the PDML, please visit the link directly above > >> and follow the directions. > >> > > > > > > -- -- > > > > The information transmitted is intended only for the person to whom it is addressed and may contain > > confidential and/or privileged material. If you have received an email in error please notify Carmel College > > on [EMAIL PROTECTED] then delete all copies of it from your systems. > > > > Although Carmel College scans incoming and outgoing emails and email attachments for viruses we cannot > > guarantee a communication to be free of all viruses nor accept any responsibility for viruses. > > > > Although Carmel College monitors incoming and outgoing emails for inappropriate content, the college cannot > > be held responsible for the views or expressions of the author. > > The views expressed may not necessarily be those of Carmel College and Carmel College cannot be held > > responsible for any loss or injury resulting from the contents of a message. > > > > -- -- > > > > > > > > -- > Vote for Cthulhu. Why settle for a lesser evil... >-- Dr. Jerry Pournelle > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above > and follow the directions. > > > > The information transmitted is intended only for the person to whom > it is addressed and may contain confidential and/or privileged > material. If you have received an email in error please notify > Carmel College on [EMAIL PROTECTED] then delete all copies of it > from your systems. > > Although Carmel College scans incoming and outgoing emails and email > attachments for viruses we cannot guarantee a communication to be > free of all viruses nor accept any responsibility for viruses. > > Although Carmel College monitors incoming and outgoing emails for > inappropriate content, the college cannot be held responsible for > the views or expressions of the author. The views expressed may not > necessarily be those of Carmel College and Carmel College cannot be held > responsible for any loss or injury resulting from the contents of a message. > > John Whittingham Technician The information transmitted is intended only for the person to whom it is addressed and may contain confidential and/or privileged material. If you have received an email in error please notify Carmel College on [EMAIL PROTECTED] then delete all copies of i
Re: Pentax 70-210 and Sigma 70-300 Apo comparison([EMAIL PROTECTED])
heard that rumor several times but never actually saw one that had that softness at the long end. so it seems i gut lucky. The Tamron AFAIK is a fine lense if you dont mind some CA's > The Sigma is so weak at the long end that (in the sample I had) images > appeared out of focus. > > People usually recommend Tamron's version of the same telezoom. But both > will be outperformed by Pentax's forthcoming DA 55-300 and DA* 60-250 F4. > > The SMC F 70-210 is quite good, but I haven't tried it on the K20D's sensor. > > Joe > > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pentax 70-210 and Sigma 70-300 Apo comparison([EMAIL PROTECTED])
The Sigma is so weak at the long end that (in the sample I had) images appeared out of focus. People usually recommend Tamron's version of the same telezoom. But both will be outperformed by Pentax's forthcoming DA 55-300 and DA* 60-250 F4. The SMC F 70-210 is quite good, but I haven't tried it on the K20D's sensor. Joe -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pentax 70-210 and Sigma 70-300 Apo comparison ([EMAIL PROTECTED])
Well a good repair can save your bacon. David J Brooks wrote: > On Tue, May 6, 2008 at 10:52 AM, Mark Roberts <[EMAIL PROTECTED]> wrote: > Not catastrophic, but even greater (and potentially > >> catastrophic) damage can be done through ham-fisted disassembly. >> > > Those swine. > > Dave > >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. >> >> > > > > -- Vote for Cthulhu. Why settle for a lesser evil... -- Dr. Jerry Pournelle -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pentax 70-210 and Sigma 70-300 Apo comparison ([EMAIL PROTECTED])
See my post in reply to John Whittingham. Ralf R. Radermacher wrote: > P. J. Alling <[EMAIL PROTECTED]> wrote: > > >> (with one significant internal weak point unfortunately). >> > > What is it? > > Ralf > > -- Vote for Cthulhu. Why settle for a lesser evil... -- Dr. Jerry Pournelle -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pentax 70-210 and Sigma 70-300 Apo comparison ([EMAIL PROTECTED])
A former member of the group John Hargrave, now deceased, repaired his 70-210 with this fault, it seems to be fairly common, my first one developed the same problem. You can see the root cause in the third picture down in this link. http://members.shaw.ca/hargravep/70-210.htm If you don't know exactly what you're doing when you try to effect the repair you will mangle the "information brush" which is now made of unobtainium. When mine failed both screws came loose and the information brush was mangled before I tried to repair it. I still have the lens if anyone wants it they can have it for $50.00 (I'll pay the postage in the US), KEH in Atlanta thinks they can repair it, (I got a quote from them for $100). The combined price is still less than these go for on ebay. When I was checking a few months ago one sold for almost $400, the cheapest price I saw was about $200. I bought a "new" one for considerably less. John Whittingham wrote: > I've heard rumour of the weak point, is it electronic? > > Regards, > > John > > On Tue, 06 May 2008 08:34:08 -0400, P. J. Alling wrote > >> I can't say much about the Sigma, but the F 70-210 4~5.6 produces >> about the sharpest pictures I get from any zoom I own, except for >> maybe the Fa 20-35. It's also built like a tank, (with one >> significant internal weak point unfortunately). >> >> Gaetan Beauchamp wrote: >> >>> Hello everyone! I would like to know how a Pentax 70-210mm qualifiy by >>> comparison to a Sigma 70-300 Apo for Pentax? Any ideas? Thank you all. >>> Gaetan B. >>> >>> >>> >>> >> -- >> Vote for Cthulhu. Why settle for a lesser evil... >>-- Dr. Jerry Pournelle >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above >> and follow the directions. >> > > > > > The information transmitted is intended only for the person to whom it is > addressed and may contain > confidential and/or privileged material. If you have received an email in > error please notify Carmel College > on [EMAIL PROTECTED] then delete all copies of it from your systems. > > Although Carmel College scans incoming and outgoing emails and email > attachments for viruses we cannot > guarantee a communication to be free of all viruses nor accept any > responsibility for viruses. > > Although Carmel College monitors incoming and outgoing emails for > inappropriate content, the college cannot > be held responsible for the views or expressions of the author. > The views expressed may not necessarily be those of Carmel College and Carmel > College cannot be held > responsible for any loss or injury resulting from the contents of a message. > > > > > -- Vote for Cthulhu. Why settle for a lesser evil... -- Dr. Jerry Pournelle -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pentax 70-210 and Sigma 70-300 Apo comparison ([EMAIL PROTECTED])
Hi Mark Thanks for that, mechanical I can cope with, when the electronics go it's scrap unless the parts are available. Regards, John On Tue, 06 May 2008 10:52:54 -0400, Mark Roberts wrote > John Whittingham wrote: > > > > On Tue, 06 May 2008 08:34:08 -0400, P. J. Alling wrote > >> Gaetan Beauchamp wrote: > >>> Hello everyone! I would like to know how a Pentax 70-210mm qualifiy by > >>> comparison to a Sigma 70-300 Apo for Pentax? Any ideas? Thank you all. > >>> Gaetan B. > >>> > >> I can't say much about the Sigma, but the F 70-210 4~5.6 produces > >> about the sharpest pictures I get from any zoom I own, except for > >> maybe the Fa 20-35. It's also built like a tank, (with one > >> significant internal weak point unfortunately). > >> > > I've heard rumour of the weak point, is it electronic? > > Nope. Mechanical. It's a cast metal tab that's part of the zoom > mechanism. It's screwed into an internal barrel and rides in a slot > in a rotating outer sleeve (if I'm recalling this correctly). The > screws that hold it in place can come out, or even be pulled out of > their threads, and jam the zoom. Not catastrophic, but even greater > (and potentially catastrophic) damage can be done through ham-fisted > disassembly. > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above > and follow the directions. > The information transmitted is intended only for the person to whom it is addressed and may contain confidential and/or privileged material. If you have received an email in error please notify Carmel College on [EMAIL PROTECTED] then delete all copies of it from your systems. Although Carmel College scans incoming and outgoing emails and email attachments for viruses we cannot guarantee a communication to be free of all viruses nor accept any responsibility for viruses. Although Carmel College monitors incoming and outgoing emails for inappropriate content, the college cannot be held responsible for the views or expressions of the author. The views expressed may not necessarily be those of Carmel College and Carmel College cannot be held responsible for any loss or injury resulting from the contents of a message. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pentax 70-210 and Sigma 70-300 Apo comparison ([EMAIL PROTECTED])
Gaetan Beauchamp wrote: > Hello everyone! I would like to know how a Pentax 70-210mm qualifiy by > comparison to a Sigma 70-300 Apo for Pentax? Any ideas? Thank you all. > Gaetan B. > > > cant say anything about the 70-210, but the Sigma 70-300 APO is sharp lens considering the price tag, no tendency to CA's at all, very low distortion, i really like it. can provide some sample pics if needed -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pentax 70-210 and Sigma 70-300 Apo comparison ([EMAIL PROTECTED])
On Tue, May 6, 2008 at 10:52 AM, Mark Roberts <[EMAIL PROTECTED]> wrote: Not catastrophic, but even greater (and potentially > catastrophic) damage can be done through ham-fisted disassembly. Those swine. Dave > > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. > -- Equine Photography www.caughtinmotion.com http://brooksinthecountry.blogspot.com/ Ontario Canada -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pentax 70-210 and Sigma 70-300 Apo comparison ([EMAIL PROTECTED])
On Tue, May 6, 2008 at 10:37 AM, Ralf R. Radermacher <[EMAIL PROTECTED]> wrote: > P. J. Alling <[EMAIL PROTECTED]> wrote: > > > (with one significant internal weak point unfortunately). > > What is it? > > Ralf Its left leg is shorter then the right one.;-) Sorry. My 70-210 F4 has a bit of zoom creep, that might be what he is refering to Dave Dave > > -- > Ralf R. Radermacher - DL9KCG - Köln/Cologne, Germany > private homepage: http://www.fotoralf.de > manual cameras and photo galleries - updated Jan. 10, 2005 > Contarex - Kiev 60 - Horizon 202 - P6 mount lenses > > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. > -- Equine Photography www.caughtinmotion.com http://brooksinthecountry.blogspot.com/ Ontario Canada -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pentax 70-210 and Sigma 70-300 Apo comparison ([EMAIL PROTECTED])
John Whittingham wrote: > > On Tue, 06 May 2008 08:34:08 -0400, P. J. Alling wrote >> Gaetan Beauchamp wrote: >>> Hello everyone! I would like to know how a Pentax 70-210mm qualifiy by >>> comparison to a Sigma 70-300 Apo for Pentax? Any ideas? Thank you all. >>> Gaetan B. >>> >> I can't say much about the Sigma, but the F 70-210 4~5.6 produces >> about the sharpest pictures I get from any zoom I own, except for >> maybe the Fa 20-35. It's also built like a tank, (with one >> significant internal weak point unfortunately). >> > I've heard rumour of the weak point, is it electronic? Nope. Mechanical. It's a cast metal tab that's part of the zoom mechanism. It's screwed into an internal barrel and rides in a slot in a rotating outer sleeve (if I'm recalling this correctly). The screws that hold it in place can come out, or even be pulled out of their threads, and jam the zoom. Not catastrophic, but even greater (and potentially catastrophic) damage can be done through ham-fisted disassembly. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pentax 70-210 and Sigma 70-300 Apo comparison ([EMAIL PROTECTED])
P. J. Alling <[EMAIL PROTECTED]> wrote: > (with one significant internal weak point unfortunately). What is it? Ralf -- Ralf R. Radermacher - DL9KCG - Köln/Cologne, Germany private homepage: http://www.fotoralf.de manual cameras and photo galleries - updated Jan. 10, 2005 Contarex - Kiev 60 - Horizon 202 - P6 mount lenses -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pentax 70-210 and Sigma 70-300 Apo comparison ([EMAIL PROTECTED])
I've heard rumour of the weak point, is it electronic? Regards, John On Tue, 06 May 2008 08:34:08 -0400, P. J. Alling wrote > I can't say much about the Sigma, but the F 70-210 4~5.6 produces > about the sharpest pictures I get from any zoom I own, except for > maybe the Fa 20-35. It's also built like a tank, (with one > significant internal weak point unfortunately). > > Gaetan Beauchamp wrote: > > Hello everyone! I would like to know how a Pentax 70-210mm qualifiy by > > comparison to a Sigma 70-300 Apo for Pentax? Any ideas? Thank you all. > > Gaetan B. > > > > > > > > -- > Vote for Cthulhu. Why settle for a lesser evil... >-- Dr. Jerry Pournelle > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above > and follow the directions. The information transmitted is intended only for the person to whom it is addressed and may contain confidential and/or privileged material. If you have received an email in error please notify Carmel College on [EMAIL PROTECTED] then delete all copies of it from your systems. Although Carmel College scans incoming and outgoing emails and email attachments for viruses we cannot guarantee a communication to be free of all viruses nor accept any responsibility for viruses. Although Carmel College monitors incoming and outgoing emails for inappropriate content, the college cannot be held responsible for the views or expressions of the author. The views expressed may not necessarily be those of Carmel College and Carmel College cannot be held responsible for any loss or injury resulting from the contents of a message. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pentax 70-210 and Sigma 70-300 Apo comparison ([EMAIL PROTECTED])
The A70~210 f/4 produces extremely sharp images and in macro mode, is amazing. Would be difficult to beat! Jack --- On Tue, 5/6/08, Gaetan Beauchamp <[EMAIL PROTECTED]> wrote: > From: Gaetan Beauchamp <[EMAIL PROTECTED]> > Subject: Pentax 70-210 and Sigma 70-300 Apo comparison ([EMAIL PROTECTED]) > To: pdml@pdml.net > Date: Tuesday, May 6, 2008, 4:56 AM > Hello everyone! I would like to know how a Pentax 70-210mm > qualifiy by > comparison to a Sigma 70-300 Apo for Pentax? Any ideas? > Thank you all. > Gaetan B. > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link > directly above and follow the directions. Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: Pentax 70-210 and Sigma 70-300 Apo comparison ([EMAIL PROTECTED])
I can't say much about the Sigma, but the F 70-210 4~5.6 produces about the sharpest pictures I get from any zoom I own, except for maybe the Fa 20-35. It's also built like a tank, (with one significant internal weak point unfortunately). Gaetan Beauchamp wrote: > Hello everyone! I would like to know how a Pentax 70-210mm qualifiy by > comparison to a Sigma 70-300 Apo for Pentax? Any ideas? Thank you all. > Gaetan B. > > > -- Vote for Cthulhu. Why settle for a lesser evil... -- Dr. Jerry Pournelle -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Pentax 70-210 and Sigma 70-300 Apo comparison ([EMAIL PROTECTED])
Hello everyone! I would like to know how a Pentax 70-210mm qualifiy by comparison to a Sigma 70-300 Apo for Pentax? Any ideas? Thank you all. Gaetan B. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
