Extremely interesting Luke, well done! So it seems to be a filter that is truly meant for Bortle 8-9, with the drawbacks you mentioned... A bit disappointing, makes me want to test some more :)
Thank you so much for watching Cuiv! :-) I definitely agree that in more severe light pollution the drawbacks might be worth it, or perhaps usage in fields of observation where perfect colour/image quality is less important such as EAA, - EAA observations from the city could be very fruitful with this filter! I'd love to see more tests if you got the chance for sure! I can't imagine how challenging b9 skies are I appreciate you watching my friend! :-) Clear skies!
Thank you Luke. I don’t know if I’m like others, but I tend to be rather impulsive with purchasing “the new best…..” After watching your video I’ve realized that my “L” UV/IR filter isn’t an impediment, in fact, it’s probably just fine 😊. Your “comparison” videos are truly invaluable (plus you’ve just saved me some money).
Thanks for testing the GNB, Luke. Interesting to see this filter in action since it was introduced by IDAS, who are known for their quality. At least for my setup the IDAS D3 does the trick on everything. Galaxies, nebula and planets all while blocking newer LED streetlights. Best all-around filter in my opinion.
Thank you buddy!! The LPS D3 looks like a great filter for sure, it's sure working well for you! :-D I may have to pick one up someday! Thank you for watching and giving your support my friend
Hey Luke, it’s nice to see a really fair and honest review mate! I’m with you, the ‘L’ wins I think on all accounts! Clearly it did a good job on gradients, however, with Pix background extraction, who needs it! And as you say, at that price point! Bet they wish they never asked you to review it now🤣 Great job mate, you stayed true and did a great test👍 Clear skies
Hey Simon! Hope you're well mate :-) It was a bit of a disappointment for sure, I really like the other IDAS stuff I own so this came as a bit of a shock haha! As you say mate, the uv/ir cut filter does the job nicely, if I had to pick one filter to use forevermore - it'd probably be a UV/IR cut! Thanks for watching :-)
Handy for On Axis Guider users who want something to put scope side the ONAG, like on the front of a reducer. Letting through a strong IR signal will help the IR signal split off downstream for guiding. I'm going to try it for that. The signal to the imaging camera will be pure Ha Oiii with no IR. NB2 was OK but a stronger IR signal is perfect. I'm tight on backfocus with the ONAG in place so this positioning of a filter really helps.
I was surprised to see the IDAS suffering with halos hopefully that issue will get resolved, I've got the standard nebula boost filter which works well on all my scopes including the RASA.
It was a bit of a surprise to me too mate, the other IDAS filters I have are devoid of halos! Really odd, but an interesting filter none the less! :-) Clear skies buddy!
Hi Luke! A IR Pass type filter is best used when the seeing is bad otherwise it will bloat everything. Looks like your seeing was ok so may have not been a fair comparison and I would suggest trying both then the seeing is bad. Also this GNB filter would possibly be better used as a luminance enhancer so maybe integrate the UVIR and the GNB together to see what happens 🙂 Also halos are unavoidable on IR unless you use a very narrow NIR band. Clear Skies!
Thanks Dave!! :-) It's an interesting idea mate, I feel that while you could indeed use the GNB as a "lum" to be combined with a uv/ir capture, i think the detail loss would be too pronounced on many targets, - it did a decent job on nebula, but galaxies just felt flat to me. Cheers for watching buddy! Hope you've been well :-)
Loved the comparison because it demos the difference IR cut makes when it comes to preserving stars. The IDAS dual band with IR pass is interesting but as someone that chose the L-eNhance over the L-eXtreme to avoid halos it's not for me. Team Baader L UV/IR for me on this one. Nice analyses and narration Luke, well done mate!
Thanks Chris!! :-D I'm glad you enjoyed the video mate, it was a real eye-opener for me to see the data side by side like that! Agreed on the UV/IR cut, It was the winner for me too mate :-) Thanks very much indeed for watching!
I was literally about to purchase this. Glad I didn't. I have the ASI294MM Pro and the color variant. The extra wavelength exposures would have been wasted with my cameras.
Thanks Chris! - It's an interesting enough filter, but I don't think it'd be a good match for the 533 sensor, they don't have the boosted IR response like the 462, 464 & 585 have unfortunately! I appreciate your support my friend :-) Clear skies!
Amazing honesty regarding halos, I got sucked in by another channel bigging up the L-extreme about a year back, but they failed to mention the halos, so when I discovered this myself I was properly annoyed. Now rocking the IDAZ NBZ.
Great review mate. I thought the GNB did a great job on the Ha side of things and keeping the gradients at bay. Bit of a let down on the Galaxies though, and the stars. On the fence with it to be honest. Mayby some more tests needed. Enjoyed the video, very honest, thanks for sharing Luke.
Thank you Ben! - I think it'll be worth testing further someday, but right now I'm pretty put-off to be honest haha! I appreciate you watching matey, hope you had a great weekend! All the best Luke
Are you not just seeing the effect of dispersion of the telescope optics at play. You can "focus" at a given position, but the lens are not achromatic into the far infrared. If you could "focus" in the infrared, then the image is out of focus for blue. So the GNB is disadvantaged here. Imaging just in the infrared might be better for the GNB. The Baeder gets around this issue.
Nice review. Ive been thinking about this filter but not so sure. The gradient removal would be big help though. I get so much of that with my severely light polluted skies.
You could certainly do that on some targets, as long as there aren't any bright stars in the field of view! - but the real issue with using GNB data as a lum channel is that you'll lose interesting details on many targets, such as the dust lane details in m51 and m63 as shown on the video - not worth the loss in my opinion! :-)
Good comparison. That being said, why would they label basically a NB filter with "Galaxy" This video pretty much proved what we already knew...galaxies are typically broadband target and nebula aren't 😂
Nice comparison, but i wonder if the results would have been different with a reflector in regard to the tighter stars. Are apos normally calculated for such a broad wavelenght range and especially from visible to infrared?
Thanks mate! - A reflector with a good apochromatic coma corrector would have been a nicer test, but my Esprit was only showing 20 focuser steps difference for critical focus between the L filter and the GNB, so they were pretty close to par-focal anyway I guess! 🙂
Thanks Luke, great comparison I was thinking of getting the IDAS after seeing Cuiv’s video. Quick question would spectral calibration resolve the issue with lack of colour in the stars ? And am I correct if I assume BlurX would take care of the halos ?
Hey Tom! - I did use SPCC on all of these comparisons, so that's a negative on that question my friend! RE: BXT sorting the halos, if they were smaller - perhaps? These are pretty big though, not really correctable is my gut feeling. Thanks for watching mate!
Hey mate! The GNB is not a good filter for the 2600 duo unfortunately, the 2600 has a built in ir cut window, and it's got weak response in IR anyway even if the window wasn't already blocking it!
Nice comparison. Seems like there are too many drawbacks to this filter what the with the halos (I hate halos) and the lack of detail in the galaxies and loss of colour in the stars.
Hey Logan! - Agreed really mate, perhaps it would be worth it from an even more light polluted location than mine, but in a B7 I don't think it's worth the drawbacks either. Thanks for watching mate! :-)
Thanks for watching Robert! - I agree there's probably situations where it'd be very useful, but pretty few and far between I reckon, hard to justify the cost at that! Clear skies mate! :-)
judging by how non-committed and relaxed filter manufacturers are with their qa, i d be hard pressed to take anyones filter purchasing advice oher than maybe cuivs or if buying astrodon
