In my opinion, you may not see much of a difference between the use of the Optolong L-enhance compared to the (separate use of the Astromania O-III and the Astromania Hydrogen-a. The only advantage in using the separate filters is that you can cleanly separate the two wavelengths for use in a false-color pallet like Hubble or HOO or similar. Shooting separate filters gives you two images each with a particular wavelength highlighted. The L-eNhance gives you both of the wavelengths in a single image which makes custom pallet processing more difficult (but not entirely impossible).
The Filters mentioned have the following pass-band widths:
Filter Oiii Ha
Optolong L-eNhance 24 nM 10 nM
Astromania O-III 6 nM --
Astromania Hydrogen-a -- 12 nM
For Oiii, the Astromania Oiii filter will give you better contrast for the Oiii features you are imaging due to its narrower band-pass. It nicely isolates the Oiii wavelength better than the L-eNhance. However, for the Ha wavelength, the Astromania Ha actually has a slightly wider band-pass. The difference is small enough that you will be unlikely to see any difference at all between the L-eNhance and Astromania Ha for Ha features in the image.
If Oiii targets are important to you, the Astromania Oiii may be worthwhile to have. The Astromania Ha just doesn't buy you enough to justify the purchase if you already have an L-eNhance.
Edited by jdupton, 09 July 2020 - 10:02 AM.