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Hoya Red Enhancer vs Hoya Starscape, K&F and Haida light pollution f...

  
 
vegetaleb
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p.1 #1 · Hoya Red Enhancer vs Hoya Starscape, K&F and Haida light pollution filters?


Hello
As we still have a good share of sodium lights in Lebanon (60-70%) , I still found out Light Pollution filters a help with non-pro stars and milk way photography.
I had a Hoya Starscape filter on my ex-Nikon 26mm f2,8 aka 43mm thread size and worked fine.
I moved to Sony and remembered that I had a good old Hoya Red Enhancer RA54 filter of 67mm that I tested on my GM 24mm f1.4, it's also good in reducing the ugly yellow/green cast of sodium lights, but I am seeing some colours artifacts like slight purple banding in the sky or around small clouds.
Some articles are saying that Hoya Starscape is just a new name for the Red Enhancer filter, so it's 99 or 100% the same products, ChatGPT though is saying it's BS and that Starscape is much better for light pollution!
Would going to a Starscape filter do any difference? Would a K&F natural light or Haida nanopro clear night filter give any advantage like no colour artifacts and better stars contrast?
In another note, for night street or architecture photography, these filters are also a good choice?



Jan 09, 2026 at 03:42 AM
Taperwing
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p.1 #2 · Hoya Red Enhancer vs Hoya Starscape, K&F and Haida light pollution filters?


The Red Enhancer and Star filters are didymium glass, which has a dropout in the yellow/orange region, which is particularly helpful in dealing with sodium and mercury vapor light polution. From a technical standpoint, these would be referred to as notch filters. Difficult to duplicate the effect in Photoshop.

If you haven't found it already, the following link may shine some light on the matter:
https://hoyafilterusa.com/pages/how-light-pollution-filters-work

Note, right from the horse's mouth, Hoya indicates that the same filter has been sold under different names.

As an aside, these are commonly used by glassblowers and hot glass workers. See:
https://phillips-safety.com/didymium-glasses/?srsltid=AfmBOopVXlebHdBpzWqyRX_wGOFoItcgNJyKkZ_HSIrrmqId8zJPg5Gi

They have also been used in the past by those oxy/acetylene welding aluminum. A bit of a lost art.



Jan 09, 2026 at 08:46 AM







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