|
Hi Eric,
as Baader claim, you'll only loose about 3% of transmission and it will block only LP emission lines.
When you do that first and only calibration, on the G2V star with your UHC-S filter in, you will be calibrated.
So ultimately, that's a good reason to calibrate your setup.
Once it's done, you'll be set to go on all objects and never have to worry about calibrating again.... Well until you change your scope or filters or image camera.
All the best
Rich
|