Andy Perrin Posted May 7, 2019 Share Posted May 7, 2019 I got a 340nm filter to play around with today, the Omega 340BP10 Excite FURA 20mm filter. Some pics below. Manufacturer supplied spectrum (dated just a few days ago, so probably of this exact filter): Out of camera RAW with no adjustments at all, the image looks like this (F/5.6 15" ISO125): With white balance in camera off the sky, it looked like this (saturation and contrast also adjusted): I think I have a light leak somewhere, probably because I put the filter in rear-mounted with putty and I bet I missed a spot. Link to comment
JMC Posted May 7, 2019 Share Posted May 7, 2019 Looks good Andy. That browny, yellow, goldy, straight from the camera looks like what I see with my Sparticle board at 340nm. Link to comment
Cadmium Posted May 7, 2019 Share Posted May 7, 2019 Very nice, probably the best use I have seen of a 340BP10.I don't know if they make a graph of each filter they send out. Link to comment
dabateman Posted May 8, 2019 Share Posted May 8, 2019 That looks very good. My 340bp10, has higher transmission, but also enough of an IR leak to cause issues in sunlight.Using a compact fluorescent black light, it does have a very nice blue IR leak, that I like though. Adds to the image. The IR seems to be lower with those bulbs to be good for UV images with it. I have just gotten into the habit of stacking all my bandpass filters with either the 330WB80 improved filter or the Baader venus filter. The only bandpass filter I have that doesn't require stacking is the 390bp25. Link to comment
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