Which internal filter is in light path during Sun imaging

Tech@ZWO

Nasa-HSIA Generally, an IR cut filter is not required when photographing planets.

Lilo

Nasa-HSIA
UV/IR cut is always there for any mode. It's just a protective glass on the sensor.

Tech@ZWO

Different people have different shooting requirements, and the infrared wavelengths they need to capture also vary. Everyone has their own shooting habits, and not all of them require an infrared cut-off. Generally speaking, when shooting celestial bodies like the moon and the sun, an infrared cut-off is not needed, unless you want to capture specific wavelengths.

Nasa-HSIA

Tech@ZWO If so, can we use narrow-band filter under Solar. Lunar, and Planetary modes?

Tech@ZWO

Nasa-HSIA No,you can't use narrow-band filter under Solar

Nasa-HSIA

Tech@ZWO Why? It is quite interesting if we can use narrow-band filter here and Solar filter together.

Glabella

Tech@ZWO it is our understanding that there is always a built in filter in the optical path no matter what is being imaged and in what mode. There are 3 built in filters (dark, UV/IR and LP) by default the UV/IR is what’s in the path. Can you please add a request to your development team to provide the user the ability to change this internal filter to the LP filter during other imaging modes like solar and lunar especially solar much like it’s already available for Deep Sky. The filter is there… why not just allow it to be used if the user wants to use it

Glabella

Nasa-HSIA and this is the crux of my question. Thank you for understanding. ZWO? Can a request for activating the LP filter during solar mode be added to the SeeStar app[](https://)

The-Patrician

With regard to imaging the sun apart from a solar filter, why would you want or need to use an PL filter when solar imaging ?

Nasa-HSIA

The-Patrician From filter curve, you can see H-alpha line in the filter range. We just want to try if some structures on the Solar surface can be detected or not.

Lilo

Nasa-HSIA
Impossible. Way too wide.
You need <1 Angstrom passband to see any details in chromosphere.

The-Patrician

Unless the Ha line you are looking at is around 675Nm if memory serves then you would not be able to observe the Chromosphere, apart from all of the additional filtration required, such as an ERF.

Nasa-HSIA

Lilo Have you try to image Solar surface by using such filter before? I studied astronomy more than 30 years. Astronomy taught me that anything is possible.

Lilo

Nasa-HSIA
20nm filter gives almost nothing for the Sun.
But if you wish, there is always an option to put 2" filter in front of seestar's optics. Easy.

Tech@ZWO

Glabella Ok,I will record to our team,thanks