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RE: from what I recall regarding filters

AGreed about filter $$$. No doubt that the best (multicoated) can be a real cost. My Big Zoom takes 77mm but I'd get 67mm for my 24-70 'kit' lens......Perfectly adequate for experiments and walk around use.

Manufacture is NOT trivial. Thickness of glass must be VERY uniform....to within microns, I suspect, and Parallel.

In semiconductor manufacture, tolerances get even worse. Especially when you must have linewidths in the nanometer range and than put on anywhere up to 11 layers in PERFECT (essentially) registration...

Trouble for me in examining photos for 'tampering' is getting at the ORIGINAL full file. Edges can show signs of sharpening or fringing IF tampered with. Any registration shifts can be seen, too.


My very FIRST photoshop experiment? I set my camera up on a tripod in the side yard. I used the self timer and stood on one side of the frame. I than set up the flash on a 2nd tripod and had the wife stand on the OTHER side.
I cut me out of one shot and moved me over to the 2nd. Perfect registration, since NOTHING had moved.
NOBODY could spot the fake. Even though? Wife had a shadow from the flash and I DIDN'T. I did several tests with different amounts of 'feathering' to get the good result.....But I suspect it could have been found out with better inspection.

Good Times......

And now that I think about it? I think a normal RGB sensor has MORE green cells than red OR blue.
I'd bracket and use the Histogram function in the finder. Than try to find the best combination of the 3 channels to yield good color.
AND? As an aside? I think that's one way to get a COLOR shot from a B&W sensor, like on MARS or someplace. Again, 3 identical shots with one eachc of R, G and B........

SEE LINK for sensor RGB array......and some additional information.
Too much is never enough



Edits: 04/21/21

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  • RE: from what I recall regarding filters - pictureguy 19:46:13 04/21/21 (0)

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