Jack Hogan, in a comment to an earlier post on the rms noise values of uncompressed and compressed Sony a7rII dark-field images, wondered if there was digital multiplication going on, and, if so, would the mean values be affected. I took a look at the mean values of a 200×200 central square of the same… [Read More]
Archives for November 2015
Sony a7RII FW 2.0 raw dark-field histograms, ISO 3200 and up
A few days ago I posted dark-field histograms from uncompressed files made with version 2 firmware running on the Sony a7II. Yesterday, I posted compressed and uncompressed read noise and engineering dynamic range plots for the a7RII running version 2 firmware. Today’s post is of dark-field histograms from the a7RII, both compressed and uncompressed. The… [Read More]
Sony a7RII FW 2.0 raw dark-field histograms, ISO 100-1600
A few days ago I posted dark-field histograms from uncompressed files made with version 2 firmware running on the Sony a7II. Yesterday, I posted compressed and uncompressed read noise and engineering dynamic range plots for the a7RII running version 2 firmware. Today’s post is of dark-field histograms from the a7RII, both compressed and uncompressed. The… [Read More]
Sony a7RII uncompressed read noise and EDR
Yesterday, I posted a comparison of uncompressed and compressed read noise and engineering dynamic range for the new version 2 firmware on the Sony a7II. Today I’ll do the same for the a7RII. I looked at a 200×200 central square and examined the red and blue raw channels, and one of the green ones. The… [Read More]
Sony a7II uncompressed read noise and EDR
Yesterday, I posted some dark-field histograms from the a7II at various ISO settings with the new uncompressed raw mode enabled. Today I’ll show you what the read noise from those images looks like, and how it compares to the CRAW lossily compressed dark field images. I looked at a 200×200 central square and examined the… [Read More]