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lancsoatcake

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Name
Daniel
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Hi All,

Well I bought myself a Sigma 150-500 which I'm overjoyed with, I really am.

However, on my 7D the one thing I really notice is how it's difficult to take 1 photo at a time as the camera takes them 1 after the other so quick... HOWEVER it doesn't appear to be the case when I use this lens, and I wondered if that was normal?

If anyone can help, I'd be really grateful. I booth the lens with a view to using it for work in Pool clubs and it's useful to have this function,

Cheers,

Dan
 
Sounds to me like you've got your camera body set to 'High Speed Continuous' (HSC), so just set it to 'One Shot' if that's what you're looking for. You can find how to do this in the manual. I think you just press AF-Drive (on top panel) and then rotate rear wheel to cycle through shooting options.

As to why you're not rattling off frames at the same rate with the Sigma lens, can't be sure. Perhaps you've been using a slower shutter speed for the shots you've taken. In HSC mode the 7D will fire off up to 8 frames per second, but only if the light is sufficient to allow a fast enough shutter speed.
 
I generally don't leave my 7D on the fastest in normal conditions, I only put it up when shooting sports or wildlife.

As for it being slower when on the Sigma, did you try it in bright sunlight or only indoors/lower light conditions? The annoying thing with the 7D and 1DmkIV is that in lower light (even if the lens is bright enough to keep the shutter speed up) they will slow down the maximum continuous shoot speed which drives me crazy. So if you were in manual mode and set to 1/1000s but the light was low then the camera is going to slow down the fps.........
 
mark1616 said:
The annoying thing with the 7D and 1DmkIV is that in lower light (even if the lens is bright enough to keep the shutter speed up) they will slow down the maximum continuous shoot speed which drives me crazy. So if you were in manual mode and set to 1/1000s but the light was low then the camera is going to slow down the fps.........
Click to expand...

Interesting, I did not know this. Does seem strange that, even with a high shutter speed, the continuous frame rate would be reduced.
 
mark1616 said:
I generally don't leave my 7D on the fastest in normal conditions, I only put it up when shooting sports or wildlife.

As for it being slower when on the Sigma, did you try it in bright sunlight or only indoors/lower light conditions? The annoying thing with the 7D and 1DmkIV is that in lower light (even if the lens is bright enough to keep the shutter speed up) they will slow down the maximum continuous shoot speed which drives me crazy. So if you were in manual mode and set to 1/1000s but the light was low then the camera is going to slow down the fps.........
Click to expand...

I think you are right, i try this on my mate's 7D. He said he wanted to see how fast my Nikon D7000 can do but we were in low light sports hall, so i bump up the iso to 4000 and wide open the aperture and then my shutter just fire like no tomorrow. Then i told him that my camera can only do 6fps and your 7D can do 8fps which will be even faster. So i try it, bump up the iso and wide open the aperture in manual mode with shutter set high, then it the speed is very very slow. I guess you just answer my doubt on the 7D.
 
I also use a Sigma 150-500, it depends how you have the camera set up, if set to prevent taking a shot if focus isn't obtained then you may have difficulty in achieving 8fps. Also 8fps is a max figure in any case and not always achievable in real life, focusing mode has a bearing on this, one thing though the 7D is pretty fast and the difficulty I have is getting just a single shot when using high speed mode.
 
There were discussions about the reduced frame rate when the 7D first emerged in 2009. The outcome seemed to be that the more complex metering required a little more time when the light was reduced (either by the ambient conditions or the maximum aperture of the lens). If the DoF preview button is held down then the metering remains constant and the frame rate should increase as a result.....maybe someone can retest the theory and report back.

Bob
 
Wow, thanks for all your replies.

Yes I don't mind leaving it on HSC at all, it's just an observational thing that its slower.

I turned the ISO right up and gave ample time for shutter speeds, I'll have another go later and advise if it's up to speed outside in daylight.

I'm still super happy with the lens, I'm just wondering whether or not if shooting wildlife I might need the extra fps....
 
mark1616 said:
....the metering shouldn't be a factor when shooting in manual yet things still slow down.
Click to expand...

Alas, not so Mark. The 7D uses the metering system to assess the colour temperature for AF purposes (and probably white balance).

Bob
 
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