Re: WTB: Pentax K 28mm f2.0 Lens
Didn't know they had that type of design back then, always thought that was more of a modern design. Nice. I notice on Boj's site that the resolution numbers are slightly better for the m, so I suppose the compromises they made were well done. Perhaps it is not quite as good wide open? As soon as the weather breaks, I am going to find out how it performs wide open. Dave J. C. O'Connell wrote: The K28/2 was an all out expensive floating element design which optimizes image quality at all focussing distances and apertures, the M28/2 was not. The M28/2 was compromised for price and much smaller size/weight considerations instead. The K28/2 is most unusual for a 28mm lens, it has a barrel profile very similar to a typical 105mm/2.8 lens! jco -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim King Sent: Tuesday, February 13, 2007 1:22 PM To: pdml@pdml.net Subject: Re: WTB: Pentax K 28mm f2.0 Lens David Weiss wrote on Mon, 12 Feb 2007 19:37:42 -0800 I wonder how that [the K28/2] is rated? I have the M version of that lens. What do you think of the optical qualities of the M version? Is it more rare than the K? According to Boz's site, the K28/2 is an entirely different design than the M28/2, with one additional element, and it weighs almost twice as much. Takinami says that along with the K28/3.5, it's the best of the Pentax 28s. I have the M28/2 already and if I ever get the K28/2 it will be interesting to compare them. Regards, Jim -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
RE: WTB: Pentax K 28mm f2.0 Lens
I think the main advantage of the floating element design is better performance at close focus range ( all focus distances equally good, instead of optimized for infinity for example). jco -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of David Weiss Sent: Wednesday, February 14, 2007 7:41 AM To: Pentax-Discuss Mail List Subject: Re: WTB: Pentax K 28mm f2.0 Lens Didn't know they had that type of design back then, always thought that was more of a modern design. Nice. I notice on Boj's site that the resolution numbers are slightly better for the m, so I suppose the compromises they made were well done. Perhaps it is not quite as good wide open? As soon as the weather breaks, I am going to find out how it performs wide open. Dave J. C. O'Connell wrote: The K28/2 was an all out expensive floating element design which optimizes image quality at all focussing distances and apertures, the M28/2 was not. The M28/2 was compromised for price and much smaller size/weight considerations instead. The K28/2 is most unusual for a 28mm lens, it has a barrel profile very similar to a typical 105mm/2.8 lens! jco -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim King Sent: Tuesday, February 13, 2007 1:22 PM To: pdml@pdml.net Subject: Re: WTB: Pentax K 28mm f2.0 Lens David Weiss wrote on Mon, 12 Feb 2007 19:37:42 -0800 I wonder how that [the K28/2] is rated? I have the M version of that lens. What do you think of the optical qualities of the M version? Is it more rare than the K? According to Boz's site, the K28/2 is an entirely different design than the M28/2, with one additional element, and it weighs almost twice as much. Takinami says that along with the K28/3.5, it's the best of the Pentax 28s. I have the M28/2 already and if I ever get the K28/2 it will be interesting to compare them. Regards, Jim -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
Re: WTB: Pentax K 28mm f2.0 Lens
The notion of close range correction for ultrawides by using floating elements was certainly first on the market in the 1960s ... I have been under the impression that the Nikkor-N 24mm f/2.8 was the first in this genre (released in 1967) and that all others followed it to market. A short treatise on this lens can be seen at: http://www.nikon.co.jp/main/eng/portfolio/about/history/nikkor/ n14_e.htm G On Feb 14, 2007, at 4:41 AM, David Weiss wrote: Didn't know they had that type of design back then, always thought that was more of a modern design. Nice. I notice on Boj's site that the resolution numbers are slightly better for the m, so I suppose the compromises they made were well done. Perhaps it is not quite as good wide open? As soon as the weather breaks, I am going to find out how it performs wide open. The K28/2 was an all out expensive floating element design which optimizes image quality at all focussing distances and apertures -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
RE: WTB: Pentax K 28mm f2.0 Lens
there has been discussion on this list before about this lens. I can't remember whether it is just speculation or whether people have hard evidence for it, but the K 28/2 was said to be a joint development with Carl Zeiss. Certainly it is very like modern CZ lenses in its looks, and rather different from other K lenses in the gnurly part of the focus ring, if I remember correctly. It feels like a CZ to me, and is very similar in shape and feel to the CZ 21/2.8 that I have. It was one of my favourite lenses. -- Bob -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of David Weiss Sent: 14 February 2007 12:41 To: Pentax-Discuss Mail List Subject: Re: WTB: Pentax K 28mm f2.0 Lens Didn't know they had that type of design back then, always thought that was more of a modern design. Nice. I notice on Boj's site that the resolution numbers are slightly better for the m, so I suppose the compromises they made were well done. Perhaps it is not quite as good wide open? As soon as the weather breaks, I am going to find out how it performs wide open. Dave J. C. O'Connell wrote: The K28/2 was an all out expensive floating element design which optimizes image quality at all focussing distances and apertures, the M28/2 was not. The M28/2 was compromised for price and much smaller size/weight considerations instead. The K28/2 is most unusual for a 28mm lens, it has a barrel profile very similar to a typical 105mm/2.8 lens! jco -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim King Sent: Tuesday, February 13, 2007 1:22 PM To: pdml@pdml.net Subject: Re: WTB: Pentax K 28mm f2.0 Lens David Weiss wrote on Mon, 12 Feb 2007 19:37:42 -0800 I wonder how that [the K28/2] is rated? I have the M version of that lens. What do you think of the optical qualities of the M version? Is it more rare than the K? According to Boz's site, the K28/2 is an entirely different design than the M28/2, with one additional element, and it weighs almost twice as much. Takinami says that along with the K28/3.5, it's the best of the Pentax 28s. I have the M28/2 already and if I ever get the K28/2 it will be interesting to compare them. Regards, Jim -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
RE: WTB: Pentax K 28mm f2.0 Lens
On Wed, 14 Feb 2007, Bob W wrote: with Carl Zeiss. Certainly it is very like modern CZ lenses in its looks, and rather different from other K lenses in the gnurly part of the focus ring, if I remember correctly. It feels like a CZ to me, and is very similar in shape and feel to the CZ 21/2.8 that I have. It was one of my favourite lenses. This thread is giving me a craving I have not had for years. Please all stop. Kostas -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
Re: WTB: Pentax K 28mm f2.0 Lens
David Weiss wrote on Mon, 12 Feb 2007 19:37:42 -0800 I wonder how that [the K28/2] is rated? I have the M version of that lens. What do you think of the optical qualities of the M version? Is it more rare than the K? According to Boz's site, the K28/2 is an entirely different design than the M28/2, with one additional element, and it weighs almost twice as much. Takinami says that along with the K28/3.5, it's the best of the Pentax 28s. I have the M28/2 already and if I ever get the K28/2 it will be interesting to compare them. Regards, Jim -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
RE: WTB: Pentax K 28mm f2.0 Lens
The K28/2 was an all out expensive floating element design which optimizes image quality at all focussing distances and apertures, the M28/2 was not. The M28/2 was compromised for price and much smaller size/weight considerations instead. The K28/2 is most unusual for a 28mm lens, it has a barrel profile very similar to a typical 105mm/2.8 lens! jco -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim King Sent: Tuesday, February 13, 2007 1:22 PM To: pdml@pdml.net Subject: Re: WTB: Pentax K 28mm f2.0 Lens David Weiss wrote on Mon, 12 Feb 2007 19:37:42 -0800 I wonder how that [the K28/2] is rated? I have the M version of that lens. What do you think of the optical qualities of the M version? Is it more rare than the K? According to Boz's site, the K28/2 is an entirely different design than the M28/2, with one additional element, and it weighs almost twice as much. Takinami says that along with the K28/3.5, it's the best of the Pentax 28s. I have the M28/2 already and if I ever get the K28/2 it will be interesting to compare them. Regards, Jim -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
RE: WTB: Pentax K 28mm f2.0 Lens
I used to have a K28/2 - a terrific lens. -- Bob -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of J. C. O'Connell Sent: 13 February 2007 22:33 To: 'Pentax-Discuss Mail List' Subject: RE: WTB: Pentax K 28mm f2.0 Lens The K28/2 was an all out expensive floating element design which optimizes image quality at all focussing distances and apertures, the M28/2 was not. The M28/2 was compromised for price and much smaller size/weight considerations instead. The K28/2 is most unusual for a 28mm lens, it has a barrel profile very similar to a typical 105mm/2.8 lens! jco -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim King Sent: Tuesday, February 13, 2007 1:22 PM To: pdml@pdml.net Subject: Re: WTB: Pentax K 28mm f2.0 Lens David Weiss wrote on Mon, 12 Feb 2007 19:37:42 -0800 I wonder how that [the K28/2] is rated? I have the M version of that lens. What do you think of the optical qualities of the M version? Is it more rare than the K? According to Boz's site, the K28/2 is an entirely different design than the M28/2, with one additional element, and it weighs almost twice as much. Takinami says that along with the K28/3.5, it's the best of the Pentax 28s. I have the M28/2 already and if I ever get the K28/2 it will be interesting to compare them. Regards, Jim -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
Re: WTB: Pentax K 28mm f2.0 Lens
Jim King wrote: As many of you know, I'm a collector as well as a user of Pentax lenses. I need a copy of this lens to help me reach my goal of owning all of the Pentax K-mount 28mm lenses. If anyone here has a copy which they would be willing to sell me I'd be very grateful. Please contact me at [EMAIL PROTECTED] - thanks! Regards, Jim I wonder how that is rated? I have the M version of that lens. What do you think of the optical qualities of the M version? Is it more rare than the K? Dave -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
