Comments on: Canon raises the bar http://www.photoclubalpha.com/2007/08/19/canon-raises-the-bar/ Search this site - over 170 articles on Alpha system topics! Subscribe to our magazine too! Mon, 13 Oct 2008 11:26:48 +0000 http://wordpress.org/?v=2.6.2 By: Bengeo http://www.photoclubalpha.com/2007/08/19/canon-raises-the-bar/#comment-48 Bengeo Mon, 20 Aug 2007 21:48:08 +0000 http://photoclubalpha.com/2007/08/19/canon-raises-the-bar/#comment-48 Perhaps AS/SSS could be disabled for the very fastest shutter speeds? After all, you are unlikely to need it at those speeds? Andy Perhaps AS/SSS could be disabled for the very fastest shutter speeds? After all, you are unlikely to need it at those speeds?

Andy

]]> By: yellowballoon http://www.photoclubalpha.com/2007/08/19/canon-raises-the-bar/#comment-47 yellowballoon Mon, 20 Aug 2007 18:33:26 +0000 http://photoclubalpha.com/2007/08/19/canon-raises-the-bar/#comment-47 Wow! I wasn't expecting a reply with that much info - you cerainly do know your stuff! That's a very good argument about the SSS, a shutter speed of 12/000th of a second certainly would inadvertantly fire the system. I hope that the flagship model is just fantastic. With amazingly high shutter speeds, sync speeds of 300th of a second, a 20 MP full frame sensor, live preview, everything! It would be great to think that sony will bring out the next 9000...oh the good old days! Wow! I wasn’t expecting a reply with that much info - you cerainly do know your stuff! That’s a very good argument about the SSS, a shutter speed of 12/000th of a second certainly would inadvertantly fire the system.
I hope that the flagship model is just fantastic. With amazingly high shutter speeds, sync speeds of 300th of a second, a 20 MP full frame sensor, live preview, everything! It would be great to think that sony will bring out the next 9000…oh the good old days!

]]> By: admin http://www.photoclubalpha.com/2007/08/19/canon-raises-the-bar/#comment-46 admin Sun, 19 Aug 2007 20:34:09 +0000 http://photoclubalpha.com/2007/08/19/canon-raises-the-bar/#comment-46 <p>I believe they will reserve the faster shutter for the flagship model, and that their original argument for not using the 9xi/9/7 shutter mechanisms in the 7D still applies - they have a very high energy requirement, causing a more sudden 'jolt' in the camera which tends to fire the AS/SSS mechanism inappropriately. This is the reason they gave me, directly, for using a low mass low energy shutter in the 7D. Since they have continued to use exactly the same shutter in every body including the A100, it's likely to be in the A300. A second reason I was given by the Japanese designer of the 7D was that this shutter is rated for 140,000 cycles. At the time, Canon shutters were rated for only 50,000 cycles. Sure enough, there have been hardly any 7D/5D/A100 shutter failures and many Canon and Nikon failures - admittedly their cameras often get heavier use. The new Canon shutter is rated at 100,000 cycles.</p> <p>Also, they assured me that the question of a moving shutter slit in front of a moving (AS/SSS) sensor produced no exposure variation or image geometry artefacts right up to 1/4000th as tested. I am surprised it does not. Maybe 1/8000th definitely would show such artefacts.</p> <p>So a 1/4000th shutter with a 1/200th curtain transit time on 1.5X may well be best in class compared to a 1/8000th shutter with a 1/250th transit on 1.6X.</p> <p>David</p> I believe they will reserve the faster shutter for the flagship model, and that their original argument for not using the 9xi/9/7 shutter mechanisms in the 7D still applies - they have a very high energy requirement, causing a more sudden ‘jolt’ in the camera which tends to fire the AS/SSS mechanism inappropriately. This is the reason they gave me, directly, for using a low mass low energy shutter in the 7D. Since they have continued to use exactly the same shutter in every body including the A100, it’s likely to be in the A300. A second reason I was given by the Japanese designer of the 7D was that this shutter is rated for 140,000 cycles. At the time, Canon shutters were rated for only 50,000 cycles. Sure enough, there have been hardly any 7D/5D/A100 shutter failures and many Canon and Nikon failures - admittedly their cameras often get heavier use. The new Canon shutter is rated at 100,000 cycles.

Also, they assured me that the question of a moving shutter slit in front of a moving (AS/SSS) sensor produced no exposure variation or image geometry artefacts right up to 1/4000th as tested. I am surprised it does not. Maybe 1/8000th definitely would show such artefacts.

So a 1/4000th shutter with a 1/200th curtain transit time on 1.5X may well be best in class compared to a 1/8000th shutter with a 1/250th transit on 1.6X.

David

]]> By: yellowballoon http://www.photoclubalpha.com/2007/08/19/canon-raises-the-bar/#comment-45 yellowballoon Sun, 19 Aug 2007 15:48:25 +0000 http://photoclubalpha.com/2007/08/19/canon-raises-the-bar/#comment-45 Hi David, As an avid Minolta 9000 fan, with many lenses, a Minolta 9xi and a Sony A100, I am wondering why you believe Sony has not put a 8000th or 12000th shutter speed on the soon to be launched Alpha? Times have rapidly changed in twenty two years and yet why would Sony use the same shutter speed as the 9000 had so many years ago? My 9xi which is hardly advanced technology these days has a 12000th of a second shutter speed and that was fifteen years ago! Maybe I am missing something, but to be honest, I would bet on an 800th of a second maximum shutter speed. Also, do you personally think that the new Sony Alpha (300, 10 etc) is going to be better than the Canon 40D or even the Nikon D200? In my experience, when something Sony comes out, it is usually the best in its class untill other manafacturers catch on. The same applied for Minolta. I anticipate that the new Sony will be good, no, very good but may wait a while for prices to settle. Good Luck Everyone, Yellow Balloon Photography Hi David,

As an avid Minolta 9000 fan, with many lenses, a Minolta 9xi and a Sony A100, I am wondering why you believe Sony has not put a 8000th or 12000th shutter speed on the soon to be launched Alpha? Times have rapidly changed in twenty two years and yet why would Sony use the same shutter speed as the 9000 had so many years ago? My 9xi which is hardly advanced technology these days has a 12000th of a second shutter speed and that was fifteen years ago! Maybe I am missing something, but to be honest, I would bet on an 800th of a second maximum shutter speed.
Also, do you personally think that the new Sony Alpha (300, 10 etc) is going to be better than the Canon 40D or even the Nikon D200? In my experience, when something Sony comes out, it is usually the best in its class untill other manafacturers catch on. The same applied for Minolta.
I anticipate that the new Sony will be good, no, very good but may wait a while for prices to settle.

Good Luck Everyone,
Yellow Balloon Photography

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