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Photo Forum / Digital Photography / Digital Photo / July 2005Nikon 5700 vs dSLR
Why is my Nikon 5700 so slow, whereas dSLR cameras (e.g. D70) are supposed to be as fast as 35mm film SLRs? Does it have to do with the specification of the lens or the quality of electronics? thanks > Why is my Nikon 5700 so slow, whereas dSLR cameras (e.g. D70) are > supposed to be as fast as 35mm film SLRs? Does it have to do with the > specification of the lens or the quality of electronics? Mainly because the 5700 uses the image sensor for focus detection - move the lens, check the sharpness, is it better?, move the lens again, check the sharpness etc. until a maximum is achieved - whereas DSLRs and some point-and-shoot cameras (e.g. Nikon 8400) use a different system which can actually estimate the focus error with a single measurement and /know/ how much to adjust the focus by. Having an estimate of the focus error (which you want to be zero) allows quicker operation than the "hunt for maximum" method where several measurements need to be made to be sure you are at the peak of image detail contrast. You can speed up your Nikon 5700 by half-pressing the shutter release to pre-focus the camera. Cheers, David >> Why is my Nikon 5700 so slow, whereas dSLR cameras (e.g. D70) are >> supposed to be as fast as 35mm film SLRs? Does it have to do with the [quoted text clipped - 14 lines] >You can speed up your Nikon 5700 by half-pressing the shutter release to >pre-focus the camera. Don't forget this is only haft of the wait. The start up time is also considerably more significant for the 5700. This lead me to have to leave mine on a lot longer than I do with my D70. Which makes for going through batteries rather quickly, even with the accessory MB-5700 battery pack attached and filled with 6 2300mA NiMh batteries. Here the lens extension has a bit to do with it. ---------- Ed Ruf Lifetime AMA# 344007 (Usenet@EdwardG.Ruf.com) See images taken with my CP-990/5700 & D70 at http://edwardgruf.com/Digital_Photography/General/index.html > On Wed, 27 Jul 2005 07:35:30 GMT, in rec.photo.digital "David J > Taylor" [quoted text clipped - 26 lines] > MB-5700 battery pack attached and filled with 6 2300mA NiMh > batteries. Here the lens extension has a bit to do with it. Yes, I was only considering the delay after the camera was switched on. I also tended to leave my 5700 on (I think I set the timeout to 60 seconds), and ended up with four batteries for a full day's shoot (although I only ever recall using three). I did turn down the LCD brightness to reduce power consumption. The Nikon 8400 has higher capacity cells (1100 mAh vs. 680/720 mAh IIRC) and the Panasonic FZ5 is light on batteries (I only have two for that camera). Cheers, David I am actually more concerned with the delay ("lag") observed when the shutter release button is pressed on the 5700. I think there is no such delay with dSLRs? > > On Wed, 27 Jul 2005 07:35:30 GMT, in rec.photo.digital "David J > > Taylor" [quoted text clipped - 37 lines] > Cheers, > David > I am actually more concerned with the delay ("lag") observed when the > shutter release button is pressed on the 5700. I think there is no > such delay with dSLRs? I assume you mean after focus and exposure have been measured? There is a delay with the DSLR, of course. The mirror has to be swung from the viewing position to the taking position, the lens aperture has to be stopped down, the shutter has to be released, and it has to travel across the whole focal plane. Fifty years of development has helped minimised that delay. With the 5700 there is no mirror to move, but the sensor needs to change mode from viewing to taking, and the lens needs to stop down. As the lens is built-in, and the aperture opening may be smaller, stopping down could be even quicker than a DSLR. Point-and-shoot cameras have had, perhaps, five years development. There are cameras which are considerable faster than the 5700 as well. The measurements at sites like D P Review will show which wins. With both types of camera, there is a need to anticipate action shots, and practice will help. Cheers, David > > I am actually more concerned with the delay ("lag") observed when the > > shutter release button is pressed on the 5700. I think there is no > > such delay with dSLRs? > > I assume you mean after focus and exposure have been measured? Yes, I mean after focus and exposure have been measured. However, I would like to add another point to the discussion: With the 5700 it is impossible to take indoor pictures without using the flash (for moving subjects) or at least a tripod (for non-moving subjects). This is the case even under seemingly adequate lighting conditions either indoors or outdoors. How does a DSLR behave in that respect? thanks >Yes, I mean after focus and exposure have been measured. Because of the live feed to LCD the aperture isn't really set until you pull the trigger. So the delay is the to which the sensor mode from preview and to adjust the aperture to the correct value. IIRC, there is a setting which will help out with this on the 5700, at the expense of the quality of the preview image. From p. 126 of the FM: Taking Pictures and the Quick Response Setting When Shutter Release Speed is set to Quick Response, pressing the shutter- release button all the way down while the previous image is displayed in the monitor (Review On), will take another picture. The new picture will use the previous images focus and exposure settings. Note, the built-in Speedlight will not fire. >However, I would like to add another point to the discussion: With the >5700 it is impossible to take indoor pictures without using the flash >(for moving subjects) or at least a tripod (for non-moving subjects). >This is the case even under seemingly adequate lighting conditions >either indoors or outdoors. How does a DSLR behave in that respect? Yes the 5700 has a relatively slow lens is struggles to focus in lower light situations and when it does, it tends to set slow shutter speed. You can bump the iso up a bit and manually set the shutter speed to help a bit. Noise from increased iso can be filter using one of several l software packages. ---------- Ed Ruf Lifetime AMA# 344007 (Usenet@EdwardG.Ruf.com) See images taken with my CP-990/5700 & D70 at http://edwardgruf.com/Digital_Photography/General/index.html Ed, thanks for the helpful reply. > >Yes, I mean after focus and exposure have been measured. > [quoted text clipped - 28 lines] > See images taken with my CP-990/5700 & D70 at > http://edwardgruf.com/Digital_Photography/General/index.html >I am actually more concerned with the delay ("lag") observed when the >shutter release button is pressed on the 5700. I think there is no such >delay with dSLRs? As David has said you first have to be specific exactly of what delay you are talking about. Are you talking about the lad after focus lock or not? You can find #s for the cameras on DPReview as David stated. One thing with the DSLR is that these will be for the "kit lens" when looking at focus speed.This can vary relatively quite a bit depending on the lens and the situation. Also as David stated the 5700 is "older" technology for a P&S these days, one reason both of us have experience with it. :-) ---------- Ed Ruf Lifetime AMA# 344007 (Usenet@EdwardG.Ruf.com) See images taken with my CP-990/5700 & D70 at http://edwardgruf.com/Digital_Photography/General/index.html They used a slow microprocessor in the camera. When designing products for the marketplace, the marketing group has the responsibility to determine the positioning of the product with respect to the competition as well as the current product set offering. This will influence the sales of the unit in question. The firm does not usually want to offer a new product that has some capabilities that will conflict with a higher profit product, or it may knock the sales out from that other product. When I worked for a particular Computer Corporation, now long gone, our Marketing group in some instances had the Engineering group slow down an upcoming offering so that it would not compete with a higher end product and kill sales. We added No-Ops to the microcode. Later on, we offered an upgrade to the system by revising the memory interface and removing the No-Ops. I suspect that Nikon did not initially want to kill sales on the 5400, but did want to encourage sales of the 5700, leaving space higher up for the 8700. SO, they played with the internal CPU speed. The 5700 could be as fast or faster than a D70, and probably take much better pictures as the optics are built in and do not require a separate assembly line as the separate lenses do on sSLR's. rtt > Why is my Nikon 5700 so slow, whereas dSLR cameras (e.g. D70) are > supposed to be as fast as 35mm film SLRs? Does it have to do with the > specification of the lens or the quality of electronics? > > thanks > They used a slow microprocessor in the camera. > [quoted text clipped - 12 lines] > upgrade to the system by revising the memory interface and removing the > No-Ops. That might be one of the reasons your computer corporation is long gone. I believe that Canon used this tactic with their 300d with a few features. I don't think they would dare continue with the strategy. > I suspect that Nikon did not initially want to kill sales on the 5400, but > did want to encourage sales of the 5700, leaving space higher up for the > 8700. SO, they played with the internal CPU speed. The 5700 could be as fast > or faster than a D70, and probably take much better pictures as the optics > are built in and do not require a separate assembly line as the separate > lenses do on sSLR's. You are absolutely dreaming. Even forgetting that they are different formats, you are just plain dreaming. Any of the ~6mp dslrs will totally kill a 5700 for every image quality parameter - except for large DOF when and if it's required, and even with a cheap kit lens. |
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