Calibration Frames

[John_Gill]

Hi,

When taking calibration frames (flats, darks and bias) should the dew shield on the scope be removed or left in place.

Look up
John

[msmythers]

John

Flats are all about optics errors. Since the dew shield is in the optics path it should be included for flats. While unlikely it's possible to have a reflection or some other odd anomaly due to a dew shield.

Bias and darks have nothing to do with optics and everything to do with camera characteristics. The dew shield will not have an effect on or off.


Mike

[John_Gill]

Thanks Mike, I have been doing it right but just needed to check.