1/60 vs 1/250 dilemma

[mario_saliba]

<p>Hi all<br>

I am shooting at 1/60 on the P setting on my canon 5d mk2. I tried other programs such as Tv and Av. On Tv when I set my shutter speed at 1/90, the camera automatically adjust itself to a slower shutter speed like 1/30 or 1/45. <br>

I would like to keep my shutter speed of at least 1/90. Is there any setting you may suggest? <br>

Thanks for your advice </p>

<p>Mario</p>

[michaeljlawson]

<p>I don't have a 5D mk2, but isn't there a "Safety switch" that even in TV mode it will reduce the shutter speed to avoid under exposure? If so, shut it off.</p>

[randallfarhy]

<p>Mario- double check to make sure the camera is set in TV (shutter preferred) and not AV (aperture preferred). I don't own a 5D2, but the only other thing I can think of that might take it off the preset shutter in TV mode would be a custom function that's over-riding it, but again, it would have to be in a CFn mode to do so.</p>

[mike_stemberg]

<blockquote>

<p>Is there any setting you may suggest?</p>

</blockquote>

<p>The 'M' Setting!<br /> You set everything, (shutter speed /Aperture/ and ISO) and you are in complete control. The camera will not try to to outhink, suggest or overide what you want to happen.</p>

[JDMvW]

<p>-- You have figured out that <em>you</em> need to choose/set ISO speed when you are shooting in the advanced settings (P, Tv. Av)? Right?</p>

<p>The point of P ="program") is that the camera program chooses <em>both</em> aperture and speed, given a particular ISO speed.<br>

If P, which is automatic, is <em><strong>choosing</strong></em> 1/60, then you're shooting in pretty dark circumstances, presuming you have normally fast lenses and the ISO level is reasonably high.<br>

If you are trying to <strong><em>set</em></strong> 1/60 in P mode, I don't understand why and how you are trying to do that. </p>

<p>The point of Tv is <strong>shutter</strong>-priority (time value ?). You set the speed, the camera program chooses the aperture so far as it is within the capability of the lens and ISO rating. Depending on options for what happens when you move out of the realm/range of the possible, it shouldn't otherwise shift the speed at all.<br>

If the settings are such that the camera is overriding your shutter speed, it means you are setting the ISO too slow.</p>

<p> </p>

[arie_vandervelden1]

<p>If you're in AV or TV or P and the shutterspeed drops too low, you can bump up your ISO and you'll be good to go.</p>

<p>The other option is to shoot in M. Set your shutterspeed to 1/90, set aperture, and if necessary adjust your ISO.</p>

<p>You didn't mention whether you shoot with flash or not. If shooting with flash then using M is generally easier. You can meter the background and set exposure as you wish - even exposure, underexposed, or overexposure. The flash will then take care of the foreground.</p>

<p>All this is possible in AV or TV or P using exposure compensation, but that adds another element to the mix and things get confusing pretty quickly. As well, you may end up re-metering if you're not careful.</p>

[scott_ferris]

<p>Mario,</p>

<p>The probable reason your camera is shifting shutter speed when you are in Tv mode is because you are shooting in low light and you have C.Fn I: 6 set to 1, that is safety shift mode, basically if your lens does not have an aperture that will give you a correct exposure wide open the camera will lengthen the shutter speed to get you that correct exposure.</p>

<p>To stop this behaviour, and be in complete control of the Tv and Av settings, change the custom function to 0 and watch your exposure meter in the viewfinder, if you are getting underexposure warning then raise the iso.</p>

<p>Easy.</p>

[michaeljlawson]

<p>@Scott, that's what I was referring to in my post above, I knew it was something like that. Safety switch, safety shift...</p>

[scott_ferris]

<p>Michael, I know, I know........<br>

I have all my gear manuals on pdf on my iPad, so often I am trying to remember which C.Fn is where!</p>

[William Michael]

<blockquote>

<p><strong>I am shooting at 1/60 on the P setting on my canon 5d mk2 . . . I would like to keep my shutter speed of at least 1/90. </strong></p>

</blockquote>

<p>If you <em>want to continue using P Mode</em>, and you want to use a faster shutter speed when P Mode initially selects 1/60s for you: provided the ISO you selected allows and your lens is fast enough, you can employ “Program Shift” to make various combinations of shutter speed and aperture, (see pp 88 – 89 of your user manual).</p>

<p>WW<br>

</p>

[mario_saliba]

<p>Thanks all, Scott you made a good point which will try asap. In the meantime I found another possible solution that may also work. There is a custom function on Av mode which will lock the shutter at 1/200. When compared to the 1/60 in a room it gave the same results. </p>

[JDMvW]

<p>Mario,<br /> I may be mistaken, but I sense a certain lack of understanding of the relation of light, aperture, shutter speed, and ISO to each other.</p>

<p>Until you learn the basics, just forcing the camera to shoot at any particular speed is without sense.</p>

<p>The whole point of <strong>Av</strong> is that the camera chooses the shutter speed. Forcing it to shoot at 1/200 is not doing anything useful. If you want to control both shutter and aperture, just use <strong>Manual</strong>. Set the shutter speed at 1/200 or whatever you want and the aperture to whatever you want and the picture will be under- or over-exposed according to the light available and the ISO setting.</p>

<p>Go back and read up on the basics of exposure.</p>

[i._l.]

<p>Using P mode on 5d2 makes me jealous.</p>

[William Michael]

<blockquote>

<p>I am shooting at <strong>1/60 </strong>on the<strong> P setting </strong>on my canon 5d mk2<strong>.</strong> I tried other programs such as <strong>Tv </strong>and Av. On <strong>Tv</strong> when I <strong>set my shutter speed at 1/90</strong>, the <strong>camera automatically adjust</strong> itself to a slower shutter speed like 1/30 or 1/45.</p>

</blockquote>

<p>And:</p>

 

<blockquote>

<p>Thanks all, Scott you made a good point which will try asap. In the meantime I found another possible solution that may also work. There is <strong>a custom function on Av mode</strong> which will <strong>lock the shutter at 1/200</strong>. When compared to the 1/60 <strong>in a room</strong> it gave the same results.</p>

</blockquote>

<p>I had this suspicion when I first read that P Mode was specifically selecting 1/60^th:</p>

<p><strong><em>Are you shooting, in low light with a dedicated E-TTL Flash on the hot-shoe and with the Flash Power on?</em></strong></p>

<p>If so then the fact that you are using Flash is significant as this shooting scenario with Flash is a completely different kettle of kippers.</p>

<p>The E-TTL functionality is assessing the ambient light levels and that is what is making these automatic shutter speed choices.</p>

<p>Further, if the Custom Function you have found is CFn 1-7 (selection either =1 or =2), then that Custom Function, will only apply when the Flash is attached and powered ON</p>

<p>WW</p>

<p> </p>