Hi Cata.
I think you have to be careful about this one and ensure that it is "image quality". An image quality filter should give lambda/4 (per inch at 632nm) transmitted wavefront distortion or better.
Peter.
H'alpha - double pass module
Re: H'alpha - double pass module
Peter,
I have bought the other two units like HeII and TiO with normal specs and they are working great.
I'll try the CaK received today...probably in the next days, when it will be clear again...and I'll gladly publish the results :-)!!
Regards
Cata
I have bought the other two units like HeII and TiO with normal specs and they are working great.
I'll try the CaK received today...probably in the next days, when it will be clear again...and I'll gladly publish the results :-)!!
Regards
Cata