Breakdown of Резкость здесь низкая по сравнению с цифровой фотографией.
здесь
here
фотография
photograph
низкий
low
цифровой
digital
Questions & Answers about Резкость здесь низкая по сравнению с цифровой фотографией.
Why does цифровая фотография change to цифровой фотографией in this sentence?
It follows the compound preposition по сравнению с (compared to / in comparison with). The с (with) part of this phrase always requires the Instrumental case, which turns the feminine nominative цифровая фотография into the Instrumental цифровой фотографией.
Could this sentence be rewritten using the comparative adjective ниже (lower)?
Absolutely. You could say Резкость здесь ниже, чем у цифровой фотографии (The sharpness here is lower than a digital photograph's). The phrase по сравнению с gives you a handy alternative to make a comparison while keeping the base form of the adjective (низкая).
Why is the full adjective низкая used here instead of the short form низка?
In modern Russian, full adjectives like низкая are commonly used in the predicate to describe a permanent or defining characteristic of the subject. The short form низка is grammatically correct but sounds more formal or bookish, whereas низкая is natural for everyday spoken descriptions.
Резкость (sharpness) ends in a soft sign. Are there clues to help remember its gender?