Choosing herschel

[EboO]

Others have looked visually and enjoyed the view. The faculae stands out more.

Alexandra

Thanks, i'll buy it and probably go for an Herschel over an astrosolar film. I suppose it would be better.

[EboO]

I'm near to buy a lacerta herschel wedge with nd3 filter but i wonder if i also need a polarizing filter in addition with a G band ?
I found that for visual use it needs a nd5 filter.

[marktownley]

You wont need a polariser with the G Band

[EboO]

Nice to know, thanks. It will works like nd3 with continuum or being brighter ?
Finally i tried astrosolar film this week-end and i rather go with an herschel wedge, i feel it more secured.

[marktownley]

I found my G band works best with the wedge with ND1.8

[EboO]

I continue to collect informations about G band and i found one that makes me a doubt : seeing in my observation place is average to good, so is it a good choice or must go for a continuum ?
I use a takahashi fc-100 doublet, so i guess it's better corrected in green than blue ?

[Montana]

Mark, for visual I think you would need more than ND1.8

Alexandra

[marktownley]

Mark, for visual I think you would need more than ND1.8

Alexandra

Oops sorry was talking imaging with the g band.

[astroshot]

The Baader Cool Ceramic Herschel Wedge is excellent.
Michael.

[EboO]

It seems to be best choice.

[OlegLviv]

I found my G band works best with the wedge with ND1.8

With which telescope do you have the best G band result? 152/900 or 127/1200?

[marktownley]

I found my G band works best with the wedge with ND1.8

With which telescope do you have the best G band result? 152/900 or 127/1200?

Hi Oleg,

I've not tried it with either scope yet to be honest, onluy my 80/600 stopped down to 60/600. I suspect I will use it with the 127/1200 though as I can rarely use 152mm aperture with Ha, so, being able to use it at 430nm will be even less opportunities in a year will be proportionally less. A slower focal ratio scope will always perform better at the shorter wavelengths though.

Mark

[EboO]

Is the best way for using G band is stopping down the refractor ? To avoid as possible the turbulence effects ?

[marktownley]

Is the best way for using G band is stopping down the refractor ? To avoid as possible the turbulence effects ?

Yes. Lesser quality refractors will still have some spherical aberation at 430nm, however importantly it also helps with oprtimal sampling when imaging.