# Photometry extinction correction magnitude

I am learning photometry and I am wondering is the uncorrected extinction instrumental magnitude always less than the corrected extinction instrumental magnitude when applying transformation coefficients?

For example suppose the uncorrected extinction instrumental magnitude is $$m^A_V = 10.00,$$ will the corrected extinction instrumental magnitude always be greater than $$10$$?

• @KornpobBhirombhakdi Comments are not for answers. – Rob Jeffries Oct 27 at 19:12
• I used to put short answer in 'answer' and that upset people because it was not long enough. I will leave a long version for others. – Kornpob Bhirombhakdi Oct 27 at 19:23