Some of these replies are overkill for simple vlogs. We just need to hear what your saying.
Since you already have a camera lets just attach a mic to the camera
search youtube for "cheap dslr mic"
you will get great video results
She just said she has cannon 400D (Which supports phantom power)Not all DSLRs have mic inputs and if they do.. most suck. Good audio can and will make or break a video. Even for simple vlogs
She just said she has cannon 400D (Which supports phantom power)
also OP is debating on getting a 700D Which also has phantom power support. And even if it did not, shotguns that run a battery will also support phantom power.
Both of which dslr mic inputs do not "Suck" but are not top end pro you are right about that
Finally, a dlsr that does not do audio also does not do video. Unless its some china knock off. You will be hard pressed to find a DSLR that does video with no mic input.
I said you would be hard pressed to find some that do not have this feature. As you have spent some time finding a few you only strengthen my statement? Yet your response seems very hostile, or im getting that vibe. A simple search for cannon t5 audio jack microphones or cannon's t5 specs will disprove your statement"a dlsr that does not do audio also does not do video." You mean like the Canon Rebel T5.. far from a china knock off. I know of there are others but I have no desire to find them all.

saving to get one now... their kinda priceyI said you would be hard pressed to find some that do not have this feature. As you have spent some time finding a few you only strengthen my statement? Yet your response seems very hostile, or im getting that vibe. A simple search for cannon t5 audio jack microphones or cannon's t5 specs will disprove your statement
Point:
-You do not need a shotgun $500 microphone with phantom drive to get sound acceptable for vlogs
-Most dslrs have a audio input (LIKE THE CANNON T5) unless its a china knock off, as you have discovered it is difficult to find one that does video and does not have a audio jack or xlr
-as i said before there are a few out there that dont, but its hard to find one.
/Discussion