I have some questions about working on raw files. Before I always take photo with jpg file directly generated from my 400D, the average size of such file is usually between 2MB - 3 MB. Then I use Photoshop to work on this file.
Now I like to take photo with raw file output and use canon DPP tool to convert the raw file into a jpg file.
I have looked two different jpg files - one from DPP generation and one from 400D generation directly.The size of DPP jpg file is much bigger than the one from camera's, for example, a 400D output jpg file of size 3MB, the corresponding DPP's jpg size is about 8 MB.
Now I come across two questions:
(1) when I look at DPP jpg file closely, it shows more noise than the
400D jpg file. What is the reason?
(2) Should I apply Photoshop to the jpg file generated DPP?
I asked this because I think Photoshop cannot directly apply to raw file. But I may be wrong.
Thanks in advance.