Evaluation of the Westinghouse H840CK15 with RCA 15GP22 image and color quality.
Can we see extended greens and reds from the 1953 NTSC color phosphors offered by this CRT?
This next test has the Sony A6300 set up for RAW quality, superior scene selection ( more sensitive light detection), ISO 250, aspect ratio 3:2 changed from 16:9, Adobe RGB, F/4.5, 25 mm, 1/20s. We used the same settings for all images. Set on a tripod, we filled the viewfinder with the screen image as best we could.
I think you will notice the lower saturation levels compared to my usual screenshots. What I’ve discovered with RAW is the increased dynamic range and detail. With the Affinity photo editor, it’s like calibrating a color television or monitor. We first tried to get the grey scale (the photo) right and hopefully everything else falls in place. Most of the editing was focused around the exposure, contrast and brightness settings. We tweaked black levels at times. We avoided picture enhancements. I like to say when first doing this RAW editing, it’s like when we got our first color TV. The tendency is to over saturate, but then I discovered how over saturation interacts with other colors and details.
These photos reveals some of the weakness’s of this particular 15GP22. In most shots, there is a lighter band at the top of the screen. This is where Mike could not get the convergence perfect. You may notice a purity issue in the lower right corner and a portion of the left center at the edge of screen. In dark scenes (the witch and hour glass) there is a vertical faint band of light, center screen, top to bottom. Most of the time it’s not noticeable and low light. 86% of the light energy is blocked by the shadow mask.
This test used DVD’s of the Wizard Of Oz and Meet In St. Louis. We hope to refine our craft as we continue to learn with further evaluations, using different movies, particularly Technicolor 3 strip movies.
Caution, very large files from 75 to 95 MB’s. View on an extended color gamut monitor if possible. Newer iPads have P3 color gamut.
TIFF 16 BIT RGB, P3 COLOR SPACE.
https://visions4netjournal.com/wp-co...9074A781D.tiff
https://visions4netjournal.com/wp-co...5ECC9E42D.tiff
https://visions4netjournal.com/wp-co...7CCA5AD24.tiff
https://visions4netjournal.com/wp-co...F9F184D93.tiff
https://visions4netjournal.com/wp-co...E8F797821.tiff
https://visions4netjournal.com/wp-co...C7A4F92AE.tiff
https://visions4netjournal.com/wp-co...3F6DE0261.tiff
https://visions4netjournal.com/wp-co...A92716187.tiff
https://visions4netjournal.com/wp-co...DACE65D99.tiff
https://visions4netjournal.com/wp-co...36D4CF92A.tiff
https://visions4netjournal.com/wp-co...19CCBF55D.tiff
https://visions4netjournal.com/wp-co...656F8F89D.tiff