James,
The E-20 ORF file only contains a thumbnail. No embedded preview.
Thanks, Kirk.
You say "No embedded preview."
So, now I'm wondering "What's an 'embedded preview'?"
An embedded preview is an image that the camera puts inside the RAW file for use as a preview. Not all cameras put previews inside their RAW files, but most current models do. Many older models didn't put previews in their RAW files.
When I was between my PC and my Mac I sent an E-20 orf to a friend who processed it to a jpeg and returned it to me.
The jpeg thumbnail WILL produce a Preview "magnifying glass" if you mouse over it.
Is that something that's "inherent" in any jpeg file.
So...even though the E-20 orf didn't have an "embedded preview", the jpeg which came from the orf DOES?
Your friend likely used a piece of software that was capable of rendering an ORF RAW file and then could save it as a JPEG. Photo Mechanic does not have its own RAW rendering engine. On the Mac, Photo Mechanic can use the OS-provided RAW renderer (ImageIO) to render many RAW formats. The Windows version of Photo Mechanic has no alternative rendering capability and needs embedded previews to be present in RAW files in order to display them at high resolution.
JPEG files are not RAW files and don't need a preview. They can be easily rendered without needing to reverse-engineer the format like RAW files do.
RAW files are more like a film negative whereas JPEGs are more like an actual print. That is a very simplified explanation, but if you want more detail, I can explain further. A RAW file has to be 'developed' before it can be used, but a JPEG is already ready to be used. (Again a simplification.)
HTH,
-Kirk
Kirk,
1- I understand raw, raw development into tif, jpeg, etc.
2- Yep, my friend used some (?) third party raw developer on my E-20 orfs and sent me the jpegs back.
I guess what I'm not understanding, and curious about is...
- if my E-20 orfs don't contain an embedded preview (no magnifying glass on thumbnail)
- and Photo Mechanic doesn't render orfs itself
- and the E-20 is not supported by the Mac OS (I checked, the E-1 is, but not the E-20)
...then what are the thumbnails that I'm looking at, of my E-20 orfs??? Where did they come from? How did they get generated?
JamesD
P.S. I'm not real hip to computers and forums and all, but I do understand that iterations of asynchronous communication are really difficult relative to two guys just sittin' and talking about something. So, I'm not going to keep hammering away at this forever.
Comes a time to just accept something for the way it is and not worry about the why. My Daddy was an aviator, and I've just got his curious mind about things, is all. So, I'll be a'thankin' you for your help, whether you're quite able to resolve every last detail for me or not.
P.P.S. This is just my first day poking around with Photo Mechanic, and, this current head scratchin' aside, I REALLY think I'm going to like this program!
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