[LRflex] Re: Was: Pond Hockey. Now: Shutter Lag.
- From: Philippe Amard <phamard@xxxxxxxxxxxxxx>
- To: leicareflex@xxxxxxxxxxxxx
- Date: Sun, 21 Jan 2007 22:41:54 +0100
Hi tt,
I experience the same lag with the L1, but only when the light is poor
and I haven't set the right settings for autofocus. When the IR light is
off for instance. If you switch to manual focus, it does not happen.
Rest of the time, you can shoot in continuous mode until the card is
full or the battery dry (except when shooting raw -> 7 pixes is a max
between two releases of the shutter).
Yours
Phileicangemix
tt688688@xxxxxxxxxxxx wrote:
>Just try to contribute some of my experience here.=20
>I used few DCs so far and I feel that the delay is caused by auto focus =
>in
>most of the case, it takes more time to focus as they are using normal =
>moto.
>But for dSlr like Canon, the ultrasonic motor is much fast.
>However, the situation improved in new DCs. I just bought a Panasonic =
>LX2,
>it is quite fast, much better than my first Om3040.
>Another problem DCs have is smaller buffer size, u can not take few =
>shots
>continusly then u will feel some kind of short lag too. Take few seconds =
>to
>write to memory card, even for my new LX2.
>
>Best Regards=20
>tt =20
>email: tt688688@xxxxxxxxxxxx=20
>
>-----Original Message-----
>From: leicareflex-bounce@xxxxxxxxxxxxx =
>[mailto:leicareflex-bounce@freelists.
>org] On Behalf Of David Young
>Sent: 2007=C4=EA1=D4=C216=C8=D5 23:57
>To: leicareflex@xxxxxxxxxxxxx
>Subject: [LRflex] Was: Pond Hockey. Now: Shutter Lag.
>
>All:
>
>A list member wrote me, via private mail, to ask the following question. =
>I
>felt it was better answered on the list, as others might be interested, =
>too.
>I've not used the senders name, to preserve the confidentiality of =
>private
>mail.
>
>
>
>
>>David,
>> Electronic newbie question for you.
>> How long is the delay between when you press the shutter release=20
>>and when the picture is taken? My limited experience with electronic=20
>>cameras is that it waits for a bit, which would make taking pictures=20
>>like this real hard.
>>
>>
>
>
>Good Morning!
>
>There are two basic types of digital cameras.
>
>The first uses an electronic shutter. The sensor is exposed to light,
>continuously. Such cameras have a panel on the back of the camera which
>shows what will be photographed, and can be used as a viewfinder. All
>"Point and Shoot" cameras are of this type.
>
>When you press the shutter button, the camera turns the sensor off, =
>clears
>all data from it's buffers, turns the sensor back on and then measures &
>stores all the data (pixel by pixel) to create the=20
>photograph. It then resumes the continuous "live view" function.
>
>The time to do all this, as well as perform the autofocus functions, set
>white balance, etc., is what causes the delay. Various cameras have
>differing delays because of the speed of the "Engine" (what they call =
>the
>computer in a digital camera) and a few other factors, not the least of
>which is money.
>
>BTW: the reason that engines vary in speed is pretty simple. Besides
>costing more, faster engines consume more battery power. People want a =
>fast
>reacting camera, with long lasting batteries. Not possible.=20
>Cameras vary in performance because each set of engineers makes a =
>compromise
>that they think buyers will accept. And no two groups of engineers seem =
>to
>come up with the same answer!
>
>In a point and shoot camera, shutter delay (often called "lag") is =
>measured
>in fractions of, to a full second or even more. A half second (500ms) =
>would
>be superb performance for a P&S. 1 to 1.5 seconds is average, whilst a =
>few
>are worse still!
>
>Of course, many P&S digital cameras can be speeded up by pressing the
>shutter button part way down. This causes the autofocus, white balance =
>and
>exposure to be set. Thus, when the shutter is pressed the rest of the =
>way,
>only the sensor must be reset and read. This speeds things up =
>considerably,
>but because of the cost factor (read "engine speed") the shutter lag =
>times
>will still not come near those of a decent SLR.
>
>The second type of digital camera is the SLR; or. more properly, the =
>dSLR.
>
>These cameras have a mechanical shutter, just like film cameras. This
>blocks the light from the sensor, so you have to see what will be
>photographed by looking through the viewfinder. When you press the =
>button,
>there is still a delay, for the camera must set exposure, set the focus =
>(if
>autofocus), lift the mirror and fire the shutter, thus taking the shot.
>White balance is done afterwards, by using an additional "ring" of =
>pixels
>around the edge of the sensor to calculate it. Thus, the delay in such
>cameras is all mechanical...=20
>there is no electrical delay... no need to "clear the sensor".
>
>This mechanical delay is, once more, a function of money. Faster=20
>mechanical systems cost more. Slower ones cost less. However,=20
>because dSLR's cost more than point and shoots, the engineers have more
>money to 'play' with.
>
>Shutter delay in dSLRs is usually measured in milliseconds (1/1000ths of =
>a
>second) with normal performance being 80 to 120ms. The very best of them
>will drop below 60ms. Leica's are the fastest responding SLR's, at just
>under 50ms, if my memory serves me correctly. Again, this speed is a
>function of cost.
>
>Making pictures like the Pond Hockey shots is, indeed, hard.... more so =
>with
>a manual focus camera, such as a Leica. Obtaining such shots with a =
>point
>and shoot,can be done, but it is more a function of luck, rather than =
>skill.
>
>Cheers!
>
>---
>
>David Young,
>Logan Lake, CANADA
>
>Wildlife Photographs: http://www.telyt.com/ Personal Web-pages: =
>http://www3.
>telus.net/~telyt
>
>
>
>
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