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Testing the new Optolong L-Ultimate 3nm Filter!
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- เผยแพร่เมื่อ 5 ก.ย. 2022
- A look at the new Optolong L-Ultimate 3nm filter for OSC astrophotography.
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Thanks for watching! Clear skies!
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Very disappointed you didn't throw the filter over your shoulder at 0:25 :D
Hilarious my friend! 😂 I should have thrown it. Imagine the looks on people's faces if I had. 😆
Awesome test man. Pre-ordered last month, can't wait to use it myself. Been using the L-eXtreme filter for 2 years now, so this is a good upgrade :)
Great - thanks for the review - I ordered mine last night!
I'm very pleased with the L-Extreme, pre-ordered the Ultimate and really looking forward to trying out under my challenging Bortle 8 Toronto skies
Dude that rig on the Skyhunter is awesome! I do the same thing with that little mount and it performs great! You can really push iOptron mounts and get good results.
Very helpful review (once again)! Regarding halos, Optolong seems to have a hard time catching up with the competition like Antlia
Thanks so much my friend. This has helped me to decide on my possible upgrade from the L Extreme. I’m going to explore some other options instead 👍
Thanks for the review, been using the L-Extreme but will wait for now....
Awesome! Been waiting for a real review!
Thank you so much for the review! The inconsistent halos are what trouble me. At least with the L extreme I know what my halos are going to look like and which stars will probably make them. The halos from the ultimate also look a bit weird. Canceled my order of the L-Ultimate. Looking at the Antlia now. It seems to have better overall performance.
Thanks for the review Shawn, always appreciate your input and time taken to test new gear. Looking forward to the Skyhunter firmware update and review as well.
Clear skies and rock on!
I’m currently using the Antlia Gold …curious to see how this performs. The halo around the secondary star is worrying…need some more comprehensive reviews
What is your impression and test result with Anflia Gold ALP-T so far?
Also interested in the Antlia gold test results!
I get halos around the exact same stars (as in the Elephant's Trunk image) with my L-Extreme filter, so it definitely seems like it could be an Optolong problem.
@@DanielEspelidPedersen L-eXtreme or L-eNhance might both give halos around some stars, that is understandable, but with the new filter L-Ultimate they should worked out about to eliminate that or at least reduce it so much, i remember they produced first test versions almost beginning of this year or end of last year and then they stopped it to improve it, now they should made this already improved then, if not then it will be difficult to trust some of Optolong filters, many are happy with them and some aren't, me i have previous NB 7/6.5nm filters and not happy with them, but i bought UV/IR cut and also SII 3nm, hopefully those i can be happy with at least, i was planning to buy L-Ultimate this month, but this video above by Shawn and his comment just made me to postponed it, i might just go to another option after all.
Gday Shawn
Great review tutorial of new filter
Looking forward to getting my hands on one asap
Cheers mate
Thanks! The appearance of haloes might be only on stars that are off-axis, and/or stars with lots of red or infrared emission. What was Mu Cephei like at the edge of IC 1396? Clear skies!
Thanks!
Looks like some additional investigation is required to check if haloes depend on stars colours and off-axis distance.
I've found the Antlia Golden although not as tight a band pass is very good at not producing Halos.
Was considering purchasing one of these but not after watching this, thanks Shawn! I’ll wait till I know the halo problem is fixed
Thanks for the video! I recently just purchased a IDAS NBZ (UHS version) and the non UHS version of this filter had halo issues when it was the NBX model. You would think such a well known filter manufacturer would have nailed this issue with this latest release. Either way that is a very narrow band pass but was surprised to still see some light pollution gradient in your image.
Thank you for useful test and review Shawn san !!
Great video, the filter really confuses in my opinion. No halos on Vega, but halos on smaller stars, perhaps it's something to do with the star wavelength? (appears mostly on 'yellow/orange' stars? perhaps?)
I personally find the small stars halo rather worrying, occasionally on bright stars - meh, ok. But when it happens on small stars that means any image could encounter that, so that's quite a no-no.
I think I might go with the Antlia Gold or the new Askar 3nm filter.
Thanks!
I am happy to see that many here or elsewhere have been using L-extreme [or L-enhance] in the past and now wanting to upgrade to this new filter, i am lucky that i didn't make the mistake by buying those old filters in the past because i knew that the new ones will be out later in future, the waiting and patience is being paid now, so i have the option now to buy L-Ultimate or waiting for something could be slightly better dunno, but i think this L-Ultimate won't be any disappointment and also can last longer without needing for upgrade.
Interesting & great review Shawn! Also having the L-eXtreme and suffering from halos around very bright stars... Clear skies.
i noticed that the haloed stars are somewhat warmer at 4000 to 6000 kelvin... in any case i think i'd rather go for the IDAS NBZ
Going to get one for my f/4.5 scope(reduced).
Great Review Shawn! An Ocal Collimator how to video would be a great IDEA!!! Thanks
Thanks for the nice review, Shawn. Someone else commented on this, and I agree that the halos seem to appear more on smaller, reddish stars rather than bright, white stars. Looks pretty nice otherwise, though. I'm not sure it would be worth the $$ to upgrade from an L-eXtreme, though. Might have to wait until more users post reviews. Thanks again!
I need to know if it’s worth upgrading from the L-extreme. Would like to see a comparison.
It is worthy, but also depends on which color camera do you have and which telescope and how you place/mount the filter.
I 👍🏼 even before watching. If it’s your review, it must have value. Watching now 😊.
Hi Shawn. Good Video! I have an L-Ultimate on order. Hoping it helps my halo problems with bright stars. Mine become dramatically more noticable a little further down the processing stream. After DBE for instance.
I enjoyed the video. and Compare Extreme and Ultimate please.
I love one of this filters.
Thanks for the review. Seems odd that the smaller stars have halos while the bigger ones dont
Hi Shawn, I am currently using the L-extreme and I really wonder if I should go for the Optolong Ultimate or the Antlia 5nm dual band filter. Do you know if Antlia is releasing a 3nm dual band as well? Can you please do a comparison of the Antlia 5nm with the Optolong 3nm.
That's what I need...a comparison of Antlia ALP-T and L-Ultimate.
Looks like the channels will separate nicely for a sho image.
hi sometime with my a Williams optical zt81 , optolong l extreme and zwo 294mc pro , i have had the same haloing occurs in small star , and i did not know what caused it , now i saw it in your video . that pattern is repeated again with the extreme and now with the ultimate, thanks
Very curious to see a thorough review of the iOptron skyhunter mount, I have one and me and a bunch of other are having tracking and guiding issues with it, I’m still able to image with it just not gettinh good sharp results as it trails from time to time
Yes I've had problems as well guiding and stop tracking. There is word from iOptron that a firmware update is coming and a hardware fix which should correct the problems. Once I have both and get the fix done, I'll be able to test the Skyhunter again.
I hope mine is not defective
I have an amazing gradient under full moon. It is a great filter but the why that gradiant is there not sure.
I will have to test further before making a decision to return it back.
Mostly shoot in dark skies in AZ (bortle 2-3) but live in bortle 7 shooting with the 2600mc would you recommend the L-Extreme or ultimate? Is the extreme strong enough to block out fairly bad light pollution while avoiding halos for when I’m in super low light pollution in your opinion.
Interesting video Shawn! I’ve been waiting to see a test on this filter, excellent review! I’ve got the LExtreme and suffer from halos on bright stars, but it really pulls out some good details, looks like the Ultimate does the same but without the halo problem on bright stars! Could be useful on my 2600mc pro, but do I really need it? and living in a bortle 4!! Thanks and clear skies!
If i were you then i will buy Antlia ALP-T golden dual band filter instead, it is better than L-eXtreme and also can be better than L-Ultimate for Bortle 4 and no halo, for me i must go with 3nm filter option because i am in Bortle 8/9.
@@TareqAstroPhoton thanks for suggestion!
Hey Shawn
What rings are you using to support WO 71. Thanks for all your helpfull videos.
Those are primaluce rings.
My biggest problem with this filter is that I ordered mine back in late August from OPT Corp and as of Sep 21, still hadn't received it.
Staying with the Antlia ALP-T...
Very interesting Shawn. I am curious re the cause of the non-concentric halos around moderately bright stars. I wonder if there is a reflection/interference issue due to the filter reflections & the Bayer Matrix layer. The halos were green which would be the strongest contribution from the Bayer Matrix layer, if it is actually part of the problem. A question: Would you be able to stick the filter in front of a mono sensor (without a luminance or other type of filter in the imaging train) and see if the same halos occur?
Some have suggested spectral class as a possible cause of the halo around certain stars. But hard to say without testing more. Your idea is good but at this point I don't intend to test it further.
@@VisibledarkAstro Thanks Shawn! Given that a large portion of stars emit strongly or moderately in the middle of the visible spectrum, I'm not sure if spectral type would be an issue..Another possibility is that we're seeing is a 'light leak' through the filter caused by problematic coatings, and the 'leak' happens to be in the Green part of the spectrum. As for no further testing...can't blame ya....clear nights are precious & generally rare in southern Ontario, so you need to devote your time to having fun with various projects!
Interesting that it isn't producing halos on the bright stars but unfortunately still seems to have quite hard halos around some of the smaller ones - perhaps those that are more red in colour?
Your halo issue may gut be related to the spectral classification of the star involved
Hi Shawn. I am having trouble with my Image Calibration in PI with the l-Ultimate filter. My images come out very green and pixilated when I debayer them no matter what I do. I have no problem with my L-Extreme filter doing exactly the same steps. Can you suggest anything please? Perhaps a setting change in Image Calibration? Has anyone else on this forum had a similar issue?
Issue fixed. I selected Automatic for Output pedestal mode in Image calibration. Hope this helps others.
Sorry didn't see this until now. Glad you got it fixed.
Hey Shawn, What mount is that you are using with the WO71?
Try Alnitak
How long are the subs exposed? i bought the filter last week but coud not test it because of bad weather and a lot of clouds.
I actually did only 1min subs with it. Lots of them. Worked great.
Very good review shame about the halos though so rather worrying.
Very thorough review Shawn, I also have the same problem with some halo's when using my L-extreme, on the bigger stars nog halo's but on smaller stars sometimes.
What I find interesting is that the halo's that I have are never in the center of the filter ...
I get this type of halo around random stars using the antlia alp-t filter with my samyang 135mm lens. Very strange!
That is interesting. Good to know.
What F-stop are you using? Wide open at f2 it might be suffering from frequency shift. They sell adjusted filters (binned?) for higher F-stops.
@@jeffhall191 yeah unfortunately I bought it right when it was announced, before they decided to make one for faster f-stops. I shoot at f3.5 using stop down rings, so definitely not at its widest aperture. They have confirmed that it is a known issue with the Samyang sadly.
Definitely not a good result for a $350 filter. I am not sure if I would recommend this. When you stretch these images those halos are going to be very noticeable.