Re: PENTAX-DA 35mm F2.4 AL lens test
On Sun, Nov 21, 2010 at 3:38 PM, Adam Maas a...@mawz.ca wrote: There's usually no drop, just the lens hanging in the bayonet from the other lugs. It's not usable in this state though as it will be quite loose. I think it's called a Lensbaby. -- 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-DA 35mm F2.4 AL lens test
On Sun, Nov 21, 2010 at 3:31 PM, Larry Colen l...@red4est.com wrote: On Nov 20, 2010, at 6:48 AM, Tim Øsleby wrote: A broken bayonet should not be the end of the universe as we know it. I've changed a few broken Nikon bayonets for customers. It's a 30 minutes job, and a plastic bayonet costs about $ 15. What about the secondary damage when the lens hits the ground after the bayonet breaks? There's usually no drop, just the lens hanging in the bayonet from the other lugs. It's not usable in this state though as it will be quite loose. -Adam -- 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-DA 35mm F2.4 AL lens test
On Nov 20, 2010, at 6:48 AM, Tim Øsleby wrote: A broken bayonet should not be the end of the universe as we know it. I've changed a few broken Nikon bayonets for customers. It's a 30 minutes job, and a plastic bayonet costs about $ 15. What about the secondary damage when the lens hits the ground after the bayonet breaks? -- MaritimTim http://maritimtim.blogspot.com/ 2010/11/20 Adam Maas a...@mawz.ca: On Sat, Nov 20, 2010 at 12:41 AM, Boris Liberman bori...@gmail.com wrote: On 11/19/2010 7:39 PM, Adam Maas wrote: There's only two issues with plastic bayonets. 1. They are far more likely to fail if any off-axis force is applied to the lens. I've seen quite a number of these, usually with kit zooms. This is not likely to be an issue with smaller primes like the DA L 35 though as there's much less of a moment arm available to put force on the bayonet lugs if the lens gets knocked. 2. They do wear quicker than a metal bayonet. VERY unlikely to be a real-world issue unless you change lenses multiple times per day, every day, for 10+ years. It's only under very heavy use that bayonet wear becomes an issue. -Adam Adam, isn't it then a logical conclusion that if one exercises minimal caution during lens change and does not change their lenses every 5 minutes, plastic bayonets are as good as the metal ones? Boris Yes for compact lenses, not so much for physically longer lenses. It's not an issue for something like the DA L 35, but even a DA L 18-55 is long enough that a sharp knock can break a bayonet lug (seen this on a number of similarly sized lenses to the DA L 18-55). Wear isn't an issue in any realistic circumstance. -Adam -- 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. -- 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. -- Larry Colen l...@red4est.com sent from i4est -- 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-DA 35mm F2.4 AL lens test
I would think so. Plastic has come a long way and is replacing metal in many applications. It would be nice though to see more non fossil oil based plastics hitting the market. Cheers Ecke 2010/11/20 Boris Liberman bori...@gmail.com: On 11/19/2010 7:39 PM, Adam Maas wrote: There's only two issues with plastic bayonets. 1. They are far more likely to fail if any off-axis force is applied to the lens. I've seen quite a number of these, usually with kit zooms. This is not likely to be an issue with smaller primes like the DA L 35 though as there's much less of a moment arm available to put force on the bayonet lugs if the lens gets knocked. 2. They do wear quicker than a metal bayonet. VERY unlikely to be a real-world issue unless you change lenses multiple times per day, every day, for 10+ years. It's only under very heavy use that bayonet wear becomes an issue. -Adam Adam, isn't it then a logical conclusion that if one exercises minimal caution during lens change and does not change their lenses every 5 minutes, plastic bayonets are as good as the metal ones? Boris -- 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. -- 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-DA 35mm F2.4 AL lens test
On Sat, Nov 20, 2010 at 12:41 AM, Boris Liberman bori...@gmail.com wrote: On 11/19/2010 7:39 PM, Adam Maas wrote: There's only two issues with plastic bayonets. 1. They are far more likely to fail if any off-axis force is applied to the lens. I've seen quite a number of these, usually with kit zooms. This is not likely to be an issue with smaller primes like the DA L 35 though as there's much less of a moment arm available to put force on the bayonet lugs if the lens gets knocked. 2. They do wear quicker than a metal bayonet. VERY unlikely to be a real-world issue unless you change lenses multiple times per day, every day, for 10+ years. It's only under very heavy use that bayonet wear becomes an issue. -Adam Adam, isn't it then a logical conclusion that if one exercises minimal caution during lens change and does not change their lenses every 5 minutes, plastic bayonets are as good as the metal ones? Boris Yes for compact lenses, not so much for physically longer lenses. It's not an issue for something like the DA L 35, but even a DA L 18-55 is long enough that a sharp knock can break a bayonet lug (seen this on a number of similarly sized lenses to the DA L 18-55). Wear isn't an issue in any realistic circumstance. -Adam -- 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-DA 35mm F2.4 AL lens test
A broken bayonet should not be the end of the universe as we know it. I've changed a few broken Nikon bayonets for customers. It's a 30 minutes job, and a plastic bayonet costs about $ 15. -- MaritimTim http://maritimtim.blogspot.com/ 2010/11/20 Adam Maas a...@mawz.ca: On Sat, Nov 20, 2010 at 12:41 AM, Boris Liberman bori...@gmail.com wrote: On 11/19/2010 7:39 PM, Adam Maas wrote: There's only two issues with plastic bayonets. 1. They are far more likely to fail if any off-axis force is applied to the lens. I've seen quite a number of these, usually with kit zooms. This is not likely to be an issue with smaller primes like the DA L 35 though as there's much less of a moment arm available to put force on the bayonet lugs if the lens gets knocked. 2. They do wear quicker than a metal bayonet. VERY unlikely to be a real-world issue unless you change lenses multiple times per day, every day, for 10+ years. It's only under very heavy use that bayonet wear becomes an issue. -Adam Adam, isn't it then a logical conclusion that if one exercises minimal caution during lens change and does not change their lenses every 5 minutes, plastic bayonets are as good as the metal ones? Boris Yes for compact lenses, not so much for physically longer lenses. It's not an issue for something like the DA L 35, but even a DA L 18-55 is long enough that a sharp knock can break a bayonet lug (seen this on a number of similarly sized lenses to the DA L 18-55). Wear isn't an issue in any realistic circumstance. -Adam -- 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. -- 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-DA 35mm F2.4 AL lens test
http://roman.blakout.net/?year=2010s=0category=infoblog=20101119151942 ^^^ first impression of the new lens. It is so fresh my exiv2 - exif library can't identify the lens, simply giving Unknown (7 214) but this shall bi fixed with further software updates... -- 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-DA 35mm F2.4 AL lens test
Roman, I've FAJ 18-35 with plastic bayonet. I bought it in Norway back in 2006. It has seen certain use and I can see nothing happening to the bayonet. In fact, plastic bayonet does not trouble me at all given my experience with FAJ 18-35 lens. Boris On 11/19/2010 4:17 PM, Roman Melihhov wrote: http://roman.blakout.net/?year=2010s=0category=infoblog=20101119151942 ^^^ first impression of the new lens. It is so fresh my exiv2 - exif library can't identify the lens, simply giving Unknown (7 214) but this shall bi fixed with further software updates... -- 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-DA 35mm F2.4 AL lens test
There's only two issues with plastic bayonets. 1. They are far more likely to fail if any off-axis force is applied to the lens. I've seen quite a number of these, usually with kit zooms. This is not likely to be an issue with smaller primes like the DA L 35 though as there's much less of a moment arm available to put force on the bayonet lugs if the lens gets knocked. 2. They do wear quicker than a metal bayonet. VERY unlikely to be a real-world issue unless you change lenses multiple times per day, every day, for 10+ years. It's only under very heavy use that bayonet wear becomes an issue. -Adam On Fri, Nov 19, 2010 at 12:15 PM, Boris Liberman bori...@gmail.com wrote: Roman, I've FAJ 18-35 with plastic bayonet. I bought it in Norway back in 2006. It has seen certain use and I can see nothing happening to the bayonet. In fact, plastic bayonet does not trouble me at all given my experience with FAJ 18-35 lens. Boris On 11/19/2010 4:17 PM, Roman Melihhov wrote: http://roman.blakout.net/?year=2010s=0category=infoblog=20101119151942 ^^^ first impression of the new lens. It is so fresh my exiv2 - exif library can't identify the lens, simply giving Unknown (7 214) but this shall bi fixed with further software updates... -- 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: PENTAX-DA 35mm F2.4 AL lens test
On 11/19/2010 7:39 PM, Adam Maas wrote: There's only two issues with plastic bayonets. 1. They are far more likely to fail if any off-axis force is applied to the lens. I've seen quite a number of these, usually with kit zooms. This is not likely to be an issue with smaller primes like the DA L 35 though as there's much less of a moment arm available to put force on the bayonet lugs if the lens gets knocked. 2. They do wear quicker than a metal bayonet. VERY unlikely to be a real-world issue unless you change lenses multiple times per day, every day, for 10+ years. It's only under very heavy use that bayonet wear becomes an issue. -Adam Adam, isn't it then a logical conclusion that if one exercises minimal caution during lens change and does not change their lenses every 5 minutes, plastic bayonets are as good as the metal ones? Boris -- 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.
