First Photos

TheSandValor wrote in post #18545001
. . . the theater was dark . . .

That makes getting good images tougher for anyone. There's excellent advice in some of the posts above, so I'll just add "Be not one bit discouraged."

TheSandValor wrote in post #18544963
Hi,
Today was my first time experiencing with an all Manual DSLR camera.
My little brother was preforming in his first theater show.

Considering this was an important event for the family, I don't think this was the time to learn to shoot in manual mode. I think this is especially true since the OP has only a mild understanding of the exposure triangle. The OP should have been practicing in manual mode long before attempting to use it in any important situation. When I started in photography, there were no options that allowed you to choose anything other than manual, so many of us old timers had to learn on the fly. That's not the case today and for this event, I believe he should have used either full auto or at least one of the semi-automatic modes if he had practiced with them to some degree before hand. If after getting a number of keepers in auto mode, he could have tried his hand in manual.

s1a1om wrote in post #18545250
I vehemently disagree. It's good to know the general relationship between all the variables, but there's no need to select all three manually. I started my foray in DSLRs setting everything manually. Then I realized what a waste of time it is and that a good photographer sets their gear in a way that allows them to capture the image they want most easily. In many cases that's AV or TV.

If you care primarily about depth of field, set the camera to aperture priority and let it figure out the necessary shutter speed. If there's a white background or it's on snow, dial in a little +EC. If it's night time or a black background dial in -EC. If you want the water in a waterfall to blur or a propeller to blur, set it to shutter priority. When using a strobe with a max sync speed of 1/200, I find TV to be most convenient.

As for learning, knowing what each control does separately (in AV or TV) makes combining them infinitely easier.

I agree completely. Understanding the relationship between iso/F-stop/SS is critical, being able to set them individually in manual mode is not. Thats like telling my son he has to learn on a manual transmission before driving an automatic so he understands how the car works.

This could be argued forever, but I'll bet that Av or Tv would have given two different exposures in the OP's two images, so exposure compensation would have been needed, even without the lights changing? Really?
You said...

s1a1om wrote in post #18545250
...and that a good photographer sets their gear in a way that allows them to capture the image they want most easily.

"Most easily" would be to set the right exposure & then concentrating on getting expressions without measurebating compensation for slightly different compositions.

In my opinion starting with Manual mode will make me understand the relationship between iso, F-stop and SS faster by actually making the mistakes and learning from them, just like in these two photos, i have learned a lot from the discussion in this thread and i would like to keep on trying to use Manual mode and not make my life "easier" by automating everything in the camera.. Furthermore, while i'am practicing the Manual mode i'am using a book and guides to keep learning the relationship of everything in a camera, it really is fun and an adventure, i don't think that there is a "right" or "wrong" approach to the matter, if some one is comfortable with auto and is having a great time taking his pictures and they are good so it is the "right" way for him

TheSandValor wrote in post #18545329
In my opinion starting with Manual mode will make me understand the relationship between iso, F-stop and SS faster by actually making the mistakes and learning from them, just like in these two photos, i have learned a lot from the discussion in this thread and i would like to keep on trying to use Manual mode and not make my life "easier" by automating everything in the camera.. Furthermore, while i'am practicing the Manual mode i'am using a book and guides to keep learning the relationship of everything in a camera, it really is fun and an adventure, i don't think that there is a "right" or "wrong" approach to the matter, if some one is comfortable with auto and is having a great time taking his pictures and they are good so it is the "right" way for him

I agree. I learned to use cameras back when there was no automation except for expensive cameras that would advance the film automatically between shots. I don't remember anybody in those days who was trying to get good images with an adjustable exposure camera having any real problems understanding the "exposure triangle" and how to use a handheld meter. All they usually needed was a tiny bit of coaching from someone who understood the subject.