I don't know if there is some strange default setup I can turn off or what but...
I have a Nikon D610 - fairly new camera for me. I'm shooting in low light environment at a wedding - have my flash and I'm 100% positive I'm shooting in manual mode not aperture, shutter speed priority, or professional or anything else. Also I am not set on bracketing. Any ideas what causes this?
Sorry - I missed the shutter speed changing... That is totally weird and frustrating... I can't imagine how that could happen unless you accidentally tweaked one of the dials.... I hope someone has more insight tie you :(
@myhrhelper Was ISO manual or auto? If it was auto in low light the camera would change the shutter speed once it reached the maximum ISO you had specified in the Auto set-up if more exposure was needed.
But more likely, check your flash settings Custom Settings Menu | Flash/bracketing. Settings e1 and e2. Despite what you have set with "M" the slowest shutter the camera will use will be the e2 setting, default is something like 1/60, and the fastest will be the e1 setting, default is something like 1/200, the synch speed of the camera, unless you have a "high speed synch" (marked with an asterisk) option set. As I am sure you know, the shutter speed has nothing to do with the exposure of the main subject lit by the flash, only those elements that are lit with natural light and where the flash light cannot reach, background usually.
Flash exposure settings and strategies are so very different from normal continuous light, you might want to set your U1 for "normal" and U2 for flash. If you shoot a lot of flash.
@vignouse@frankhymus@myhrhelper
I use the 610 as well and think that Richard and Frank have identified potential issues. Auto-ISO can get switched on by accident fairly easily with the top dial (I've done this myself several times but can't reproduce it on purpose -- I know, need to read the manual). Doing this causes the ISO to jump around and affects settings.
@myhrhelper I was mistaken about e2. In M you can set and use a speed slower than that. In A, P or AUTO the camera will not drop the shutter below this. But the e1 statement is correct, you can't shoot faster than this. Indeed, with the flash mounted, you cannot set even set a speed faster than this, unless you have an "Auto FP" setting for e1, and your flash is capable of shooting "high synch."
@taffy Holding the ISO button down and rotating the FRONT dial will toggle AUTO ISO on and off. Unless you have redefined the ISO botton to somewhere else, and/or reversed the front and rear command dials...
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But more likely, check your flash settings Custom Settings Menu | Flash/bracketing. Settings e1 and e2. Despite what you have set with "M" the slowest shutter the camera will use will be the e2 setting, default is something like 1/60, and the fastest will be the e1 setting, default is something like 1/200, the synch speed of the camera, unless you have a "high speed synch" (marked with an asterisk) option set. As I am sure you know, the shutter speed has nothing to do with the exposure of the main subject lit by the flash, only those elements that are lit with natural light and where the flash light cannot reach, background usually.
Flash exposure settings and strategies are so very different from normal continuous light, you might want to set your U1 for "normal" and U2 for flash. If you shoot a lot of flash.
I use the 610 as well and think that Richard and Frank have identified potential issues. Auto-ISO can get switched on by accident fairly easily with the top dial (I've done this myself several times but can't reproduce it on purpose -- I know, need to read the manual). Doing this causes the ISO to jump around and affects settings.