Re: 645D performance in -25 °C
On 25/03/2011 08:46, AlunFoto wrote: On the last day at Svalbard I joined a snowmobile hike to the East coast of Spitsbergen, a 10 hour ride. I carried the 645D in a holsterbag (a LowePro Toploader) on my chest. The temperature in Longyearbyen when we started was -25 °C. I could swear it was colder on the glacier. In short, the camera performed flawlessly. Exposures turned out correct, the AF was snappy and accurate, processing and storing to memory card worked at normal speeds and without glitch. All buttons operated as they should. There were some gotchas, though, but hardly the camera's fault. 1. The LCD on top of the camera got vry sluggish. When changing shutter speed with the control wheel, for example, it took about five seconds to switch the displayed number. 2. All of the manual focus 645 lenses and many of the FA lenses are constructed in the same way as are the A-series for K-bayonet. That is, with a lot of metal. This means one has to be careful about handling the lenses with bare skin. Any amount of moisture will freeze on touch. 3. The glass on rear display also gets very cold. My nose stuck to it twice. The skin is still sore, two days later. Cath came in and asked what I was choking over... Sorry. 4. Battery performance goes down. Mine was fully charged in the morning. By lunch I had made about 100 exposures, and the indicator showed 67% charge. Some time in the afternoon I tried to do a series on passing snowmobiles. The indicator dropped to empty after five shots, but all images were stored correctly. I tried again with eight exposures twenty minutes later, and everything still got stored properly. The indicator would go back to 67% after a couple of minutes' rest in the holsterbag. Oh, and _don't_ breathe out with the camera before your face! :-) -- 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.
645D performance in -25 °C
On the last day at Svalbard I joined a snowmobile hike to the East coast of Spitsbergen, a 10 hour ride. I carried the 645D in a holsterbag (a LowePro Toploader) on my chest. The temperature in Longyearbyen when we started was -25 °C. I could swear it was colder on the glacier. In short, the camera performed flawlessly. Exposures turned out correct, the AF was snappy and accurate, processing and storing to memory card worked at normal speeds and without glitch. All buttons operated as they should. There were some gotchas, though, but hardly the camera's fault. 1. The LCD on top of the camera got vry sluggish. When changing shutter speed with the control wheel, for example, it took about five seconds to switch the displayed number. 2. All of the manual focus 645 lenses and many of the FA lenses are constructed in the same way as are the A-series for K-bayonet. That is, with a lot of metal. This means one has to be careful about handling the lenses with bare skin. Any amount of moisture will freeze on touch. 3. The glass on rear display also gets very cold. My nose stuck to it twice. The skin is still sore, two days later. 4. Battery performance goes down. Mine was fully charged in the morning. By lunch I had made about 100 exposures, and the indicator showed 67% charge. Some time in the afternoon I tried to do a series on passing snowmobiles. The indicator dropped to empty after five shots, but all images were stored correctly. I tried again with eight exposures twenty minutes later, and everything still got stored properly. The indicator would go back to 67% after a couple of minutes' rest in the holsterbag. Oh, and _don't_ breathe out with the camera before your face! :-) -- http://www.alunfoto.no/galleri/ http://alunfoto.blogspot.com -- 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: 645D performance in -25 °C
On 25/3/11, AlunFoto, discombobulated, unleashed: The temperature in Longyearbyen when we started was -25 °C Look forward to the pics! I spent 5 minutes in an industrial deep freeze once at -25c and after half the time it became a trial to even breathe. Mind you, no acclimatisation, straight in and out from room temp, so probably the worst possible way to do it. But I take my hat off to you - you Vikes must have ice in the blood! -- Cheers, Cotty ___/\__ || (O) | People, Places, Pastiche -- http://www.cottysnaps.com _ -- 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: 645D performance in -25 °C
2011/3/25 Cotty cotty...@mac.com: On 25/3/11, AlunFoto, discombobulated, unleashed: The temperature in Longyearbyen when we started was -25 °C Look forward to the pics! I spent 5 minutes in an industrial deep freeze once at -25c and after half the time it became a trial to even breathe. Mind you, no acclimatisation, straight in and out from room temp, so probably the worst possible way to do it. But I take my hat off to you - you Vikes must have ice in the blood! Ouch, that's definately brutal. And how about clothing? We had four or five layers of clothing, mind you, so apart from exposed extremities, it was actually pretty comfy. I had thin gloves inside huge mittens to avoid exposing my hands while shooting. The gloves sufficed for snap sessions up to 15 minutes before feeling the cold. And btw, the snowmobiles had heating elements in the handlebars. :-) Pics will probably have to wait a couple of days. I only have about one hour computer time today, and none tomorrow. -- http://www.alunfoto.no/galleri/ http://alunfoto.blogspot.com -- 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: 645D performance in -25 °C
Quite an experience! Thanks for telling us. Bulent - http://photo.net/photodb/user?user_id=2226822 http://www.pentaxphotogallery.com/bulentcelasun -- 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: 645D performance in -25 °C
On 25/3/11, AlunFoto, discombobulated, unleashed: Ouch, that's definately brutal. And how about clothing? Just my usual Berghaus which is good for about -10 or so which is workably the coldest it usually gets here in the UK, aberrations like December aside. -- Cheers, Cotty ___/\__ || (O) | People, Places, Pastiche -- http://www.cottysnaps.com _ -- 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: 645D performance in -25 °C
Pentax should have you test their stuff. -25 C is really impressive. I tried very hard not to laugh at your nose getting stuck to the LCD. I know it hurt, but it's the first time I've ever heard of that. On Fri, Mar 25, 2011 at 3:46 AM, AlunFoto alunf...@gmail.com wrote: On the last day at Svalbard I joined a snowmobile hike to the East coast of Spitsbergen, a 10 hour ride. I carried the 645D in a holsterbag (a LowePro Toploader) on my chest. The temperature in Longyearbyen when we started was -25 °C. I could swear it was colder on the glacier. In short, the camera performed flawlessly. Exposures turned out correct, the AF was snappy and accurate, processing and storing to memory card worked at normal speeds and without glitch. All buttons operated as they should. There were some gotchas, though, but hardly the camera's fault. 1. The LCD on top of the camera got vry sluggish. When changing shutter speed with the control wheel, for example, it took about five seconds to switch the displayed number. 2. All of the manual focus 645 lenses and many of the FA lenses are constructed in the same way as are the A-series for K-bayonet. That is, with a lot of metal. This means one has to be careful about handling the lenses with bare skin. Any amount of moisture will freeze on touch. 3. The glass on rear display also gets very cold. My nose stuck to it twice. The skin is still sore, two days later. 4. Battery performance goes down. Mine was fully charged in the morning. By lunch I had made about 100 exposures, and the indicator showed 67% charge. Some time in the afternoon I tried to do a series on passing snowmobiles. The indicator dropped to empty after five shots, but all images were stored correctly. I tried again with eight exposures twenty minutes later, and everything still got stored properly. The indicator would go back to 67% after a couple of minutes' rest in the holsterbag. Oh, and _don't_ breathe out with the camera before your face! :-) -- http://www.alunfoto.no/galleri/ http://alunfoto.blogspot.com -- 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. -- Steve Desjardins -- 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: 645D performance in -25 °C
On Fri, Mar 25, 2011 at 11:07 AM, Steven Desjardins drd1...@gmail.com wrote: Pentax should have you test their stuff. -25 C is really impressive. Steve Desjardins OT but just thought i would share. The survey company i worked for used Leica equipment for about 99.9% of their work. Proven reliablility and the transits and total stations worked at -35C. In 1994, the powers that be thought they would save money and buy into the Sokkia system of total stations. Less money, did almost the same job, but with more steps to get to the results.(almost like a Canon Dslr menu setup) They had a QA with the party chiefs and the one question i asked the sales rep was, do they work at -35C.?? Answer, They should Result, they did not. 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. -- Documenting Life in Rural Ontario. www.caughtinmotion.com http://brooksinthecountry.blogspot.com/ York Region, 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: 645D performance in -25 °C
I wonder if Leica digital could do that. -Original Message- From: David J Brooks pentko...@gmail.com Sender: pdml-boun...@pdml.net Date: Fri, 25 Mar 2011 13:55:08 To: Pentax-Discuss Mail Listpdml@pdml.net Reply-To: Pentax-Discuss Mail List pdml@pdml.net Subject: Re: 645D performance in -25 °C On Fri, Mar 25, 2011 at 11:07 AM, Steven Desjardins drd1...@gmail.com wrote: Pentax should have you test their stuff. -25 C is really impressive. Steve Desjardins OT but just thought i would share. The survey company i worked for used Leica equipment for about 99.9% of their work. Proven reliablility and the transits and total stations worked at -35C. In 1994, the powers that be thought they would save money and buy into the Sokkia system of total stations. Less money, did almost the same job, but with more steps to get to the results.(almost like a Canon Dslr menu setup) They had a QA with the party chiefs and the one question i asked the sales rep was, do they work at -35C.?? Answer, They should Result, they did not. 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. -- Documenting Life in Rural Ontario. www.caughtinmotion.com http://brooksinthecountry.blogspot.com/ York Region, 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. -- 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.
