dem331 Posted November 15, 2014 Share #1 Posted November 15, 2014 Advertisement (gone after registration) Sorry if this has been posted before: M240-P, High ISO (anything over 800) slows down continuous shooting very, very significantly. Can this be right? I am using SanDisk Extremepro 16GB 95MB/s. Thanks. Link to post Share on other sites More sharing options...
Advertisement Posted November 15, 2014 Posted November 15, 2014 Hi dem331, Take a look here High ISO continuous shooting M240. I'm sure you'll find what you were looking for!
davidmknoble Posted November 15, 2014 Share #2 Posted November 15, 2014 Sorry if this has been posted before: M240-P, High ISO (anything over 800) slows down continuous shooting very, very significantly. Can this be right? I am using SanDisk Extremepro 16GB 95MB/s. Thanks. More than likely it is the SD Card slowing you down. I have used the M240 at ISO 3200 with no slowdown. The Sandisk 64gb card (high speed) appears to make a difference. For example, the wakeup time is almost nil with that card, but the same Sandisk card at 32gb is a slow wakeup time. Cannot tell you why, but it works. Try that and see if you get better results.... Link to post Share on other sites More sharing options...
dem331 Posted November 16, 2014 Author Share #3 Posted November 16, 2014 Many thanks David. I will try with a 64GB card. When you say high speed is that more than 95 MBs. I think Thorsten Overgaard says in his site that the speed should not make a dfference. What speed is yours? Thanks. Link to post Share on other sites More sharing options...
jaapv Posted November 16, 2014 Share #4 Posted November 16, 2014 It is basically the controller on the card that makes the difference, not the wire speed as such. Lexar Pro 16GB 600x Class 10 makes my camera quite a bit faster. Link to post Share on other sites More sharing options...
Leicakillen Posted November 16, 2014 Share #5 Posted November 16, 2014 It is basically the controller on the card that makes the difference, not the wire speed as such. Lexar Pro 16GB 600x Class 10 makes my camera quite a bit faster. Dear jaapv ...also start-up time for the M?? /Anders Link to post Share on other sites More sharing options...
pieterpronk Posted November 16, 2014 Share #6 Posted November 16, 2014 Why would the sd card be the deciding factor in the camera being significantly slower at higher iso's? The filesize doesn't change at higher iso's, does it? I'm not saying it's not true, but I'm genuinely wondering if changing to a faster sd card helps the slower continuous shooting at higher iso. I thought it was just the camera doing more work on higher iso files before writing to sd card. As such the sd card shouldn't matter. Or so I thought. Do you guys really not see any change in speed in continuous mode between 200 iso and 3200 iso (with the same shutter speed set)? Link to post Share on other sites More sharing options...
dem331 Posted November 16, 2014 Author Share #7 Posted November 16, 2014 Advertisement (gone after registration) Pieter's question is mine exactly. Thanks. Link to post Share on other sites More sharing options...
jdlaing Posted November 16, 2014 Share #8 Posted November 16, 2014 Why would the sd card be the deciding factor in the camera being significantly slower at higher iso's? The filesize doesn't change at higher iso's, does it?I'm not saying it's not true, but I'm genuinely wondering if changing to a faster sd card helps the slower continuous shooting at higher iso. I thought it was just the camera doing more work on higher iso files before writing to sd card. As such the sd card shouldn't matter. Or so I thought. Do you guys really not see any change in speed in continuous mode between 200 iso and 3200 iso (with the same shutter speed set)? The noise reduction carried out in camera at higher ISO shooting slows down the write time. Link to post Share on other sites More sharing options...
dem331 Posted November 16, 2014 Author Share #9 Posted November 16, 2014 Jaap, I must admit that I do not understand what the controller on an SD card is, but your card appears to have the same specification as mine. Is there a difference? Many thanks. Link to post Share on other sites More sharing options...
jaapv Posted November 17, 2014 Share #10 Posted November 17, 2014 Dear jaapv...also start-up time for the M?? /Anders Yes. 1.5 sec. But this is by no means a universal finding. Somehow it varies by camera. Link to post Share on other sites More sharing options...
jaapv Posted November 17, 2014 Share #11 Posted November 17, 2014 Jaap, I must admit that I do not understand what the controller on an SD card is, but your card appears to have the same specification as mine. Is there a difference? Many thanks. An SD card consists of two parts. The memory and a chip that does the electronic bit. On cards of the same specification the controlling software will differ. As will the software of the camera. The real writing speed depends on how well card and camera work together. For instance Panasonic Gold cards, whilst of the same or higher specification as the Lexar are desperately slow on my M. Link to post Share on other sites More sharing options...
davidmknoble Posted November 17, 2014 Share #12 Posted November 17, 2014 Dem331, mine is 95mbs, but I think there is only one version. I cannot attest to the physics behind the speed gains, but I can tell you they are very real. I've used the fastest Sandisk and Panasonic cards firm 8gb, 16gb, 32gb and 64gb. In the M240, the 64 is by fa the fastest start time from power save mode. I think write time is faster, but I have not measured it technically. Link to post Share on other sites More sharing options...
pieterpronk Posted November 17, 2014 Share #13 Posted November 17, 2014 The noise reduction carried out in camera at higher ISO shooting slows down the write time. And as such the speed of the memory card has nothing to do with the speed difference in continuous mode between 200 iso and 3200 iso. At least that has always been my understanding of it, but other people in this thread seem to suggest buying faster memory cards can make the speeds of continuous mode at high iso the same as at low iso. Link to post Share on other sites More sharing options...
pop Posted November 17, 2014 Share #14 Posted November 17, 2014 Please pardon if you already are aware of that. There are two situations where the camera will slow down drastically. One is when shooting with so little light that exposure times are long (one second or more, I believe). In this case, the camera will take very long for the reduction of the resulting noise. The other occurs when shooting several images within a short time. This will overwhelm the buffer and block the camera until more room is available in the buffer. Both possibilities might be implied by the description of the problem. Link to post Share on other sites More sharing options...
pieterpronk Posted November 17, 2014 Share #15 Posted November 17, 2014 Thanks, indeed a thread like this can easily get lost in unclear definitions of the problem. For me, I narrowed the "problem" down to the following repeatable scenario. I set iso to 200 and shutterspeed to 1/60 and shoot in continuous mode for 3 seconds. I then set iso to 3200 and shutterspeed to 1/60 and shoot in continious mode for 3 seconds. The amount of shots made at 200 iso is noticeably higher than at 3200 iso. I'm not much of a continuous mode shooter although I do find it handy in dark situations where I use high iso and slow shutter speeds. Holding down the shutter for multiple shots helps with keeping the camera steady and usually if the subject is moving occasionally it helps to take multiple shots increasing the chances that one of them doesn't show motion blur on the subject. I find the M to be perfectly capable for this kind of use, although as I said, there is a noticeable drop in speed at high iso. Link to post Share on other sites More sharing options...
dem331 Posted November 17, 2014 Author Share #16 Posted November 17, 2014 My conditions are: -M-P Compressed DNG + JPEG fine B&W -SanDisk Extremepro 16GB 95MB/s -135mm broad daylight -1/250 shutter speed -ISO 800 I get 3fps for the initial burst -ISO higher than 800 I get what seems to be 1fps Link to post Share on other sites More sharing options...
dem331 Posted November 17, 2014 Author Share #17 Posted November 17, 2014 I am going to try the card that Jaap mentions, but maybe the 64GB version, to see if the controller matches the camera better. Does Leica have nothing to say about this (recommended cards, sizes,etc ) ? I tried to look on their site but found nothing. I think I may ring them. Link to post Share on other sites More sharing options...
dem331 Posted November 17, 2014 Author Share #18 Posted November 17, 2014 Leica has this to say about cards in their FAQ: Fundamentally, we recommend San Disk cards as we prefer to use these for compatibility tests at Leica. To ensure optimum exploitation of the camera’s performance potentials, we recommend the use of Class 10 cards with speeds of ≥30 MB/s – e.g. from the SanDisk Ultra or SanDisk Extreme lines. SDXC cards with higher speeds are compatible, but offer no additional benefit in terms of speed compared with SDHC cards. and also.... The choice of SD and SDHC cards in the market is already very big and is constantly growing. Therefore, Leica Camera AG is not able to do comprehensive compatibility- and quality testing with all available cards in the market. We recommend “Extreme III” or “Professional” from the leading brands such as “SanDisk” or “Lexar”. Using other card types, will not damage camera or card, but as especially “no name” cards do not respect the full SD or SDHC standards, Leica Camera AG cannot warranty full function with those cards. Link to post Share on other sites More sharing options...
jdlaing Posted November 17, 2014 Share #19 Posted November 17, 2014 And as such the speed of the memory card has nothing to do with the speed difference in continuous mode between 200 iso and 3200 iso. At least that has always been my understanding of it, but other people in this thread seem to suggest buying faster memory cards can make the speeds of continuous mode at high iso the same as at low iso. The memory card will only record as fast as the camera can write. Link to post Share on other sites More sharing options...
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