Re: SV: Tokina AT-X 165 PRO DX 16-50mm and AT-X 535 PRO DX lenses50-135mmf2.8
Joe I remember (but may be wrong) that you (or was it someone else?) said the DFA100 was a Tokina design and DFA50 was the usual 50mm macro design from Pentax. Am I correct or am I mistaken? -- Thibault Massart aka Thibouille -- Photo: K10D,Z1,SuperA,KX,MX, P30t and KR-10x ;) ... Thinkpad: X23+UB,X60+UB Programing: D7 user (trying out D2007) -- 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: SV: Tokina AT-X 165 PRO DX 16-50mm and AT-X 535 PRO DX lenses50-135mmf2.8
IIRC those have Tokina barrel designs with Pentax Optics. Note the D-FA has the same basic 9 elements in 8 groups design that the F and FA versions have. -Adam On 12/6/07, Thibouille [EMAIL PROTECTED] wrote: Joe I remember (but may be wrong) that you (or was it someone else?) said the DFA100 was a Tokina design and DFA50 was the usual 50mm macro design from Pentax. Am I correct or am I mistaken? -- Thibault Massart aka Thibouille -- Photo: K10D,Z1,SuperA,KX,MX, P30t and KR-10x ;) ... Thinkpad: X23+UB,X60+UB Programing: D7 user (trying out D2007) -- 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. -- M. Adam Maas http://www.mawz.ca Explorations of the City Around Us. -- 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: SV: Tokina AT-X 165 PRO DX 16-50mm and AT-X 535 PRO DX lenses50-135mmf2.8
Pentax slightly modifies Tokina lenses and then they sell them under the Pentax name. Not correct, but I suppose this particular urban legend will never die. Tokina designed the optics of the 12-24. Pentax designed the optics of the other lenses issued jointly until now. Pentax holds patents on these designs. We don't know yet who designed the optics of the 11-16, but I suspect it was Tokina. (Nice to know Tokina still employs at least one optical designer.) There will be a DA 11-16 F2.8, but not for a while. Each company designs their own lens bodies, and assembles the lenses. It is not advertised, but Pentax grinds, polishes, and coats the optics for the Tokina versions of the lenses. Both the Tokina and the Pentax versions have the same coatings. By allowing misinformation such as the quotation above to proliferate on the internet Pentax has harmed its reputation, IMO. 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: SV: Tokina AT-X 165 PRO DX 16-50mm and AT-X 535 PRO DX lenses50-135mmf2.8
The Tokina's do NOT have the same coatings as the Pentax versions. Or at least the 16-50 doesn't. There's no other way to explain the difference in flare handling between the DA* and AT-X Pro versions, also the Tokina's have a different colour signature consistent with their other lenses, which is indicative of coating differences. I suspect Pentax does do the coatings, but uses Tokina's specified coatings on the glass destined for Tokina. -Adam On 12/4/07, Joseph Tainter [EMAIL PROTECTED] wrote: Pentax slightly modifies Tokina lenses and then they sell them under the Pentax name. Not correct, but I suppose this particular urban legend will never die. Tokina designed the optics of the 12-24. Pentax designed the optics of the other lenses issued jointly until now. Pentax holds patents on these designs. We don't know yet who designed the optics of the 11-16, but I suspect it was Tokina. (Nice to know Tokina still employs at least one optical designer.) There will be a DA 11-16 F2.8, but not for a while. Each company designs their own lens bodies, and assembles the lenses. It is not advertised, but Pentax grinds, polishes, and coats the optics for the Tokina versions of the lenses. Both the Tokina and the Pentax versions have the same coatings. By allowing misinformation such as the quotation above to proliferate on the internet Pentax has harmed its reputation, IMO. 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. -- M. Adam Maas http://www.mawz.ca Explorations of the City Around Us. -- 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.
