Gavster's recent post on band-shift has induced me to try something that has been percolating in the back of my mind since I received my Baader High Speed 6.5nm H-alpha filter. This evening I used an afocal setup that had my 45mm Plossl with this filter attached to the end and inserted into a 50mm Nikon lens set to f/2.0. This yields the equivalent of a 30mm optic operating at f/1.2. Luckily the sky was very clear, transparent and calm although there is a first quarter moon shining too. The news is that all nebulae were bright from the middle to the edge of the FOV! I moved the Heart and Soul complex from one side to the other with no dimming. Same for the California. In fact I had a very nice view of it at one extreme and the Tadpole/Flaming Star complex at the other. But, of course, the 'star' of the show was Orion. A magnificent Barnard's Loop and Angel Fish display was joined by the Rosette - all in the same FOV.
That's the scoop. I would write some more but I would rather go back outside and drink in some more of these views. If you are wondering I do not have the 3nm High Speed filter to try with this lens configuration. The 6.5 is clearly a winner.