Panasonic G7 option Ex. Tele Conv -> Zoom What is this?

JakeJY wrote:

Brisn5757 wrote:

Aberaeron wrote:

Trevor Carpenter wrote:

Aberaeron wrote:

I have three current Panasonic cameras and I leave the Ex Teleconverter feature pemanently on. If I wish to use it, I select a smaller file size and it magnifies automatically. I have no other reason for choosing the smaller two file sizes.

That's what I was interested to here. I don't as a rule shoot jpegs, so I think i could take this a step further and leave the picture size as 4/3s m as well as Ex Tele Conv On. That would mean that all I would need to do to use Ex Tele Conv is switch from RAW to JPG

If I was to use the feature often, there is the option of memorising a set of shooting settings into a custom memory for instant or near instant recall [depending on which memory is set for recall at the time, the current being the last used]. As it is, I'm quite happy to choose EX TC by choosing the appropriate file size by using the item in my customised Quick menu, usually sticking to 4:3 or 16:9 aspect ratio.

Rather disappointingly the Ex TC only works with jpeg. It does not work when RAW+jpeg is selected, to provide a raw file at standard size and a magnified jpeg. There must be good technical reasons as to why Ex TC is disabled in that case.

When someone designed the feature of having raw + jpg the indention was to have an identical files in jpg that was captured in raw mode. It might take major software upgrades to change this. I have a feeling that the raw file is written first then a copy of the raw file is converted to jpg.

Brian

While it is true that it may not matter if you use RAW RW2 files or JPEG that the camera would first go through RAW data either way, it may not be necessarily true that it creates the JPEG from the RW2 file, esp. when you shoot JPEG only.

Keep in mind, the RW2 file is a lossy compressed file and not just a straight binary of the RAW data. It takes up extra space in the RAM of the camera to create that file and also some processing power to compress the RAW data. It makes sense that when shooting JPEGs that there is a process that skips creating that file if it is not necessary. Evidence of this is that most cameras have faster burst speeds when using JPEG-only vs RAW or RAW+JPEG.

It seems to come down to two possibilities when using the raw + jpg.

1  The raw file is written then a copy of the raw file is converted to jpg.

2 The raw file is copied to a file and the raw file while still in the cameras memory is converted to a jpg file.

Unless you can decode the cameras software there is no way of knowing.

Brian