9 replies to this topic

[Star-Hunter]

Hi to all. I became the owner of the Optolong L-Pro filter and did some testing with DSLR camera.

This interesting filter perfectly preserves the balance of colors and reduces light pollution. It is suitable for shooting nebulae, and objects of stellar nature (galaxies, star clusters).

 

Full review: http://www.star-hunt...lip-eos-review/

Raw files: https://cloud.mail.r.../Kjfh/t4RBEL2VE

 

Equipment:

Samyang 135\2.0 ED Canon EF

Canon 550Da (with removed "blue glass")

Sky-Watcher Adventurer mount

Filters: Optolong L-Pro, Svbony CLS.

Location: Russia, Anapa, backyard.

Attached Thumbnails

• 
• 
• 

Edited by Star-Hunter, 17 May 2019 - 01:17 PM.

[Star-Hunter]

Spectrum and location.

Attached Thumbnails

• 
• 

[Star-Hunter]

Some tests of L-Pro and CLS filters.

Attached Thumbnails

• 

[Star-Hunter]

Scorpio constellation:

Attached Thumbnails

• 

[Traveler]

Nice review. Can you talk a little about the processing (color balance tweaks) with the Svbony CLS? What steps are necessary?

 

To bad there seems to be no Nikon APS-C version...

[Star-Hunter]

Can you talk a little about the processing (color balance tweaks) with the Svbony CLS? What steps are necessary?

Oh, color balance with CLS filter it is problem for me. The green and blue channels are very similar, so in fact we get bicolor (H-alpha + OIII + H-beta). To get acceptable white balance, I use automatic color balance with Registax 6 or Fitstacker. Stars lose their color, but in the conditions of light pollution more important for me to get the nebula.

[tmarsala]

To your question, yes, it is very suitable for nebula and galaxies.  Some would argue not, and you may get better colors from a dark sky.  But with four hours of subs, here is what I got.  I am pleased with the optolong Lpro.  Once you align the RGB in post, it is very accurate in colors.

 

[Alen K]

What would be an interesting comparison to me is if you took the three images in your initial post, did gradient reduction on all of them and set the resulting black levels the same, with no other modifications. That should show quite clearly the SNR and color differences, which are obscured by the large differences in overall sky glow.  We already know light-pollution filters can reduce background sky-glow: that is their reason for existing. It's the other effects that need closer examination. 

 

Btw, do you know what kind of street lighting is used in your location? In general, light-pollution filters depend on suppressing certain wavelengths from sodium and metal halide lamps. They don't do well against LED lighting, which is much more broadband in nature. That's what I have locally. My city is saving energy (presumably, if the number of lights or the overall illumination didn't go up as well) but has made it harder for me to image. 

[tsk1979]

Does SVBONY do IR cut? 

[galacticinsomnia]

Does SVBONY do IR cut?

No, it passes IR past 740nm, it may be higher, but it is at least 740.