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 <[email protected]>: >> On Sat, Nov 20, 2010 at 12:41 AM, Boris Liberman <[email protected]> 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 >> [email protected] >> 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 > [email protected] > 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 [email protected] sent from i4est -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
