› Forums › Photometry › Photometric filters › Johnson-Cousins – Bessell
7 June 2020 at 8:18 pm
#582617
![](https://britastro.org/wp-content/uploads/2016/11/picture-146-1478110706-80x80.jpg)
Participant
Hi Andrew,
I thought Bessell was pretty much the same as Johnson-Cousins eg here half way down the page
http://spiff.rit.edu/classes/phys440/lectures/filters/filters.html
Of course the elephant in the room is the response of the sensor which is very different today compared with detectors of previous eras
Robin