What budget LP filter for a camera lens?

[Luter68]

Hi, I am taking images with  a Nikon D5100 and a 200 mm f/4 AI lens that I front stop to f/5.4. I also have an Hoya UV(0) filter attached. I have moderate to high LP from my backyard and I would like to add an LP filter to try to improve things. With a 200mm large nebular complexes are my main target but I am not too happy so far. I have a celestron AVX mount and I managed guiding to work, so I am not afraid of long exposures.

On the long run I want to move to a mono cooled camera (ASI1600mm being my choice at the moment). With such a sensor format (I wouldn't consider spending more, so larger cameras are out) I can use 31mm filters in front of the camera, either with the lens or with a future small refractor I am also thinking of. For this reason spending a lot of money for a large filter to mount in front of the lens seems a waste to me.

i fully realize that the Astronomik and Hutec CLS filters are amazing but I can't fit their cost in my development plan.

Thus, I narrowed to the following three and would like to know what the people think about.

1) TS Optics 2" CLS filter

https://www.teleskop-express.de/shop/product_info.php/language/en/info/p4686_TS-Optics-2--CLS-Breitband-Nebelfilter-fuer-Beobachtung-und-Foto.html

At only 55 euro is very actractive. The curve provided at the link is the filter density so it may still benefit leaving the UV filter under it. This is the one that would cut more light of the three.

2) Hoya red intensifier 52mm.

this is a neodymium filter at 42 euro but seems cutting a bit less on the UV than the following, nearly three times more expensive one.

3) Baader neodymium filter 2"

https://www.teleskop-express.de/shop/product_info.php/info/p511_Baader-Skyglow-Neodymium-2----more-contrast-on-Moon-Planets.html

At 112 Euro this is way the most expensive I am wishing to consider. Looking at the transmission curve, the UV wouldn't be needed.

If anyone has direct experience with those, I would love hear about it.

I am particularly interested in opinions/experience with the TS Optics one.

My modest attempts at DSO are here on astrobin

https://www.astrobin.com/users/luter68/

Thanks a lot and clear skies!

[Luter68]

Hello,

Anybody who tried the TS Optics CLS filter at least?