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Showing results for tags 'filters'.
Found 57 results
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I have been waiting for this telescope for almost five months. Since May, 19th, to be precise. The day I went to the TS Italia store and saw for the first time the SLD model, model now discontinued. I even missed the last available piece just for a few days, once I finally placed my order, June, 25th. It was to be replaced by a newer model, available at the end of the Summer. Boy, am I glad I did miss it. The wait was definitely worth it. The new and improved model is simply beautiful. I fell in love with it as soon as I saw it on the Tecnosky website a few weeks ago, when they posted the product sheet. But in person, it's even more beautiful. So, the people from the store emailed me Friday, October the 2nd, telling me that it was finally available for pickup. I read the message only a whole hour later and it was soon going to be closing time. I started calling at 4:30 PM and I finally managed to get my phone call through at around 5:05 PM. The store closes at 6:00 PM and doesn't reopen until Monday. And it's 40 minutes away from where I live. I made it there in 35. There was no way I was going to have to wait till Monday, knowing my scope was only a few minutes away. So, here's the pre-unboxing picture: - top left, brown box, behind: Vixen clamp for guide-scope - top right, white box: 60mm f/4 guide-scope - top left, white boxes: T2 Nikon ring, 30mm spacer, adjustable spacer - center, behind white boxes: Optolong L-Pro 2" filter - right of filter: spacers mounted and already calibrated for 55mm backfocus, for eventual use of the ZWO ASI 224MC camera with the refractor - top right, Bahtinov mask - underneath the white boxes, top left: Losmandy bar to attach telescope to my NEQ6 Losmandy saddle - big box underneath all of the above: Tecnosky 80mm f/6 FPL-53 OWL Triplet, with carrying case and 0.8x 4 elements flattener/reducer - ZWO black case: ZWO ASI 224MC guide-camera / planetary camera - front left: Talisker 57° North and two glasses (don't mind the shape of the glasses, they are the closest to Whisky suitable glasses that I currently own...) ready for me and my wife to celebrate the end of the wait - front right: box for the aforementioned Whisky I actually waited for yesterday (Saturday, the 3rd) for the unboxing, because I wanted my best friend Omar to be present and help me with filming and taking pictures. We have been friends since we went to kindergarten and we always have had astronomy as a common interest. It just so happens, to my immense surprise, that my telescope is actually SN. 0001, so I own the first telescope ever produced of this new series. The certificate is also very promising, with a Strehl ratio of 0.974 and a Ronchi test that seems very well behaved. I like a little less the red edges on the lenses, but I guess only time and a proper visual - and astrophotographic - session will be able to tell. Obviously the "new equipment curse" didn't help, but we got almost a whole hour with clear sky patches and obviously I couldn't pass up the opportunity. I quickly setup with the bare minimum necessities for a visual observation and me, my wife and my best friend Omar - who helped with the staging, recording and directing of the unboxing event - took a quick look at the Moon, Saturn, Mars, M31 and Perseus Double Cluster. I can definitely understand now, even if the seeing wasn't perfect, and my eyepieces didn't offer enough magnification (25mm and 10mm give me 80x and 200x, with my C8, but with a native focal length of 480mm, even with a Barlow 2x, we could only achieve about 38x and 96x, respectively), what people mean when they say that an apochromatic refractor brings out the objects from the background sky. The contrast was stunning, the stars were absolute points, pinpoint, small and sharp (with my C8 they always have kind of a "blob" feeling), the contrast on the Moon was fantastic and I could see many details, despite it being almost full, and only at 48-96x. I think it passed the visual test with honors. I was also very happy to be able to see the Double Cluster all in the same field of view for the first time. Saturn was well defined, could clearly make out the rings - don't recall, in all the excitement, rush and cycling between me, my wife and my friend, if I saw the Cassini division, but I'll definitely try again next clear sky night. Mars was also beautiful, could clearly see its rusty red color, the polar cap and some darker, black features on the surface. I really can say it's a beautiful telescope, very well made and machined. The attention to details is really of another level, the paint finish is very nice and matte. Also very lovely all the different red and black anodized surfaces, they really give it a nice finish and personality. The focuser is also the best I have ever had on a telescope. Very smooth, precise, with no backlash. Coming from a C8 where every touch of the focuser throws off the image all over the place and the backlash is quite significant, I really appreciated how easy it was to fine tune focusing with a proper focuser, especially with the 10:1 focusing knob. I can't wait to be able to take the first pictures of some star field, to check if even photographically the telescope lives up to my expectations. I hope to get pinpoint stars corner to corner and that the backfocus won't be something too hard to make perfect. Here's some accessories. Optolong L-Pro 2" filter, Bahtinov mask, Losmandy dovetail to replace the Vixen one the telescope comes with, Nikon T2 ring and spacers to use the ASI 224MC with the correct backfocus directly on the telescope, instead of a guide-camera. Here's the 60mm f/4 guide-scome, with Vixen clamp. And the ZWO ASI 224MC guide-camera. Here's the mandatory celebration beer, at Corte dell'Orso (the Bear's Courtyard). It's a Belgian sour beer, lambic style. Oudbeitje by Hanssens Artisanaal, with added strawberries. A very nice beer, sour, tart and fruity. Could definitely taste the strawberries. Cheers! Here's a couple of pictures of the full setup, with everything mounted on my Sky-Watcher NEQ6 Pro. The setup is in its astrophotographic configuration: mount, telescope, guide-scope, guide-camera, filter, flattener/reducer and at the end the Nikon D5300 astromodified. All controlled by Astroberry on my Raspberry Pi 4 4GB, conveniently mounted on a bar across the two telescope rings. And finally a close up of the rig.- 7 replies
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Hello, I'm selling these 2 filters since I'm getting a mono astro cam. The filters are barely used and in perfect condition, no scratches, no fingerprints, not even dust. They are both amazing filters, probably the best investment I've made. I've attached some images taken with these filters, using a 100$ celestron newtonian, a 250$ Canon 500D and the infamous AVX. Also attached are images of the filters showing their perfect condition. Astronomik CLS-CCD Canon Clip in Filter: https://www.astronomik.com/en/filter-gegen-lichtverschmtzung-filters-against-lightpollution-lpr/cls-ccd-filter/clip-filter-eos-mit-astronomik-cls-ccd.html Original price including VAT is 155 Euros (around USD 182). I got it for around USD230 including VAT, shipping and custom taxes. Selling for USD 120. Astronomik Ha 12nm Canon Clip in Filter: https://www.astronomik.com/en/clip-filter/clip-filter-canon-aps-c/clip-filter-eos-mit-astronomik-h-alpha-ccd-12nm.html Original price including VAT 194 Euros (around USD 228). Got it for around USD 270 including VAT, shipping and custom taxes. Selling for USD 180 I am willing to ship them on my own expense using LibanPost (from Lebanon). Shipping might take time; if you would like to use some other shipment method please contact me to discuss the price. Feel free to buy one or both together. Let me know if you have any questions. You can also contact me on <private email address removed> Cheers, Anthony
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Hi, I would like to share with you an article written by me on high-resolution solar imaging in different wavelengths. Glad that the European Physics Journal (EPJ) Web of Conferences published it. You can read it at: https://www.epj-conferences.org/articles/epjconf/abs/2020/16/epjconf_seaan2020_01002/epjconf_seaan2020_01002.html You can see the different layers of the Sun in high-resolution images using different setups. Best regards. Alfred
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So...a question...let's say you want to shoot in a slightly light polluted area...but you also want to use the IR/UV cut filter...how can you use both then? You can only apply one filter at a time...so are is this a sort of 'pick your poison'? So you can't have IR/UV filtered along with Light pollution as well? For example here: https://expertphotography.com/best-astrophotography-filters/ There's a ton of great filters...but how is it possible if you need a light pollution filter because of the area you're in..but you also want to cut IR/UV ? It seems like you can only do one at a time. Thanks all.. -
As I have replaced them with new-style versions, I have two old-style ZWO 36mm unmounted narrowband filters for sale: - H-alpha - S-II They are pre-2018, so with both sides silver instead of yellow&purple, and come in the original, but opened, packaging. Condition like new. Attached images have been made with them. Any decent price will do. Nicolàs -
Although I've had my scope for a couple of years it hasn't had much use and I'm pretty much still inexperienced. The other night I was looking at M13 which pretty much matches everyone's description of a fuzzy ball. I couldn't really say that I could start to resolve any of the stars, maximum magnication was x100. Would a Ultra High Contrast Filter help? If so any recommendation please. TIA. Ed
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Hello I am wondering if anyone has a suggestion that might help me My imaging set up is an RC reflector with an FLI proline 16803 camera and 50mm Astrodon filters (LRGB + 5nm narrow band) I have had a string of issues...everything from my mount had mechanical problems to my telescope had issues with the mirror cell to some family distractions...but at long last I seem to have everything working with the exception of the Astrodon Ha filter. Attached are representative 30minute subframes of the horse head and Pacman nebulae in Ha, SII, and OIII. I get similar results with different objects although for bright, broad spectrum targets like M42, I will get data from the Ha filter (much as the stars shine thru on the HH and Pacman) although even that data does not comport with other imager’s Ha images of those objects. The LRGB performance appears to be normal. My hypothesis is that this Ha filter is defective, perhaps not centered on 656.3nm I have contacted Astrodon and exchanged a couple of emails with Cary Chleborad seeking some help. At first he claimed there was no issue because with enough manipulation some data could be extracted from the Ha. Later, when confronted with the other narrowband frames and the obvious difference to the Ha, at first he ghosted me, but when I said I would ask other imagers for help, he responded with a new position stating that because of the way the filters are made and their robust quality processes, it is impossible for the filter to be defective and therefore something else must be at issue. He does not offer a suggestion of what might be the problem, nor is he interested in having me send the filter back for evaluation. Frankly, I’m more than disappointed given the premium I paid for Astrodon filters All that aside, and taking Cary’s position at face value, does anyone have an idea of what might cause this behavior other than the filter? In a perfect world, does anyone live in the Austin, Texas area who would be willing to try my filter one night and see what they get with their equipment? The attached link is to the raw, uncalibrated files right off the camera. I think a simple blink process in PixInsight will show what I’m talking about. I’m a little at my wits end, please help! https://www.dropbox.com/sh/60mvhzb717hdhnl/AACcAMkQdDsJuk1RU10PXvgja?dl=0 -
Hi, I'm a beginner and I want to buy something for my telescope. I have a Bresser 6 inch Newtonian(750mm focal length) I have 2 lenses, 9mm, 25mm, a moon filter and a 2x barlow. What would be the next thing to get? I was thinking maybe a solar filter, a light pollution filter since i am stuck at home, idk. What are your thoughts on this?
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I am selling the following items: Revelation Dielectric 99% Quartz 1.25" diagonal. The 1.25" nosepiece is threaded for filters. IMPORTANT: The screw hole on the 1.25" eyepiece holder requires tapping and re-threading, therefore the discounted price: £25 SOLD Gerd Neumann Jr. Ronchi Okular 10L/mm. This is useful for checking whether the optics have turned edge: £20 SOLD Set of 1.25" Orion coloured filters (made in Japan): #38A (blue), #58 (green), #23A (red): £30 SOLD Price includes 1st class Royal Mail signed-for. Payment via bank transfer or PayPal as friends.
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Hello my first question (takes deep breath) I’m looking at buying a moon filter I have a nexstar 6se, now it’s possible I’ve had an information overload but I’m sure I read or watched a video that said SCT type scopes dim the light of the image because of the design with that said the standard density of a moon filter I’m looking at (Baader Neutral Density Moon filters) is 0.9. Because of image being dim (if that’s correct)would I be better off getting a filter with 0.6 density to avoid the image being too dim. i know the filter is there to help your eyesight etc ive had the scope for a couple of days and haven’t actually used it during the night yet so I have no idea how bright the moon would be. Any advice would be much appreciated even to tell me I’m barking up the wrong tree Andy
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Probably a stupid question... Heyyy soo i am a begginer and about to buy my first telescope.A Skywatcher 200 p. I ve just though of something , Since i know filters can be stacked i ve been wondering if i could take visual RGB filters and stack them.Specifically blue green and red in order to create a visual full colour image ,like photography. I know its probably a stupid question because people all over the world would have done this by now .But i m just curious. -Kronos
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I'm selling my 1.25" baader H-alpha 7nm filter. I purchased it on amazon several months ago, but have never actually used it, as my CCD didn't work. (Its just been put in a filter wheel but never used!) As such it is in perfect condition. Price £75 including delivery to a UK address. Payment via Paypal (buyer pays fees), Paypal friends, or bank transfer Any questions, please ask.
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I currently have an ultra high contrast filter - Zhumell High Performance UHC - and have had some luck seeing additional features in larger objects while using it. I was thinking about purchasing an Oxygen-III filter also, but wonder just how different is the O-III compared to the UHC? Is it worth the money to have both in my filter collection? My scope is only a 130mm, and I would love to see additional details while finding and viewing DSOs such as Dumbbell and Ring nebulae, see more details in Eagle, Trifid, etc. It would be awesome to find something that would also enhance galaxies too (M31, M33 etc.). Does anyone know if an O-III filter will perform better than my current UHC filter?
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Reading the forums, it seems certain filter types are best suited to certain DSOs, in particular different nebulae. If OIII filters are good for most nebulae, which nebulae benefit more from other types? If UHC filters help with contrast for galaxies & fainter DSOs, are there certain suffixed types better than others. Hydrogen Alpha, Beta & various other filters, get mentioned. What are those for? -
Hi I will buying a Celestron 11" HD cassegrain and to save I need to buy most of the needed equipments since they are 2x -2.5x price in Asia and i would not want to end up with things I dont need. For eyepieces will a combination of Ethos 13, 17, 21, Nagler 31, Panoptic 41 or William swan 40 and a TPO 50mm. Any suggestions please? Im not really well versed yet with filters for planets and deep sky and other than sky viewing I will be using a Nikon D5500 for astrophotography and maybe buy a simple webcam. Any suggestions? Im also considering getting a JMI dual speed motored focuser....Any suggestions? I hope with your suggestions I can gather most of what I need since I will be bringing them home to Manila Philippines where there no astronomy stores. Thanks in advance. -
Good morning, I'm close to purchase the ASI1600 with the filter wheel and OAG. I have a couple of questions about the filters: Is it worth to go for the Baader LRGB? Or can I go for the ZWO ones (maybe are Optlong?). Some bad reports on the L filter on the later. For narrow band I was thinking on the Astrodons: 5nm Halpha, 3nm OIII and SII. I don't want to go for the 3nm Halpha and the same NII... not high polluted area, less filters. Am I right? Always looking for a balance price-caracteristics. About the size, 31mm unmounted. Thanks so much for your help, Aleix
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I am searching and researching for another filter. Usage: a) to bring forth details from stars and clusters, mostly DSO objects (stars, clusters, galaxies, nebulae); and b), to provide clearer details on nebulae. So my question to all of you is, what kind/brand of filter helps you achieve the above? Note: my principal interest here is Astro-Photograhy vs. visual. I already have a Celestron O-III filter, and a Solomark UHC. I am looking to add a 3rd filter that will help me pull details from most DSOs. Not all filters may provide all solutions, so there may be the need to consider 2 (two) additional filters to add to my collection. So, what do you use and how happy are you with the outcome? I am interested first in filter type, and second in who provides it. Thanks for your replies. I am fortunate with clear dark skies here (ie, an LPR is unnecessary, beside I have one... maybe two.) OOPS! I think this belongs in a different forum, my bad! -
Hi all was out last night the 9th and was just viewing around 21:30 seeing was brill so a bit of moon as Jupiter was bounce ing all over the place try in to get focus with the rgb was terrible , That said I pointed at the moon ,and the boil was evident and I ran a few test vids could not get tight focus Here's the kit C9.25" sct Dmk 21 mono Ir 740mn pass filter Cgem on pier 30fps Average 1200 frames best 90% stacked
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I really struggle when viewing nebula as they appear really, really faint and barley distinguishable (expect M42, M43 due to shear size and brightness) this is due to heavy(ish) light pollution, I have seen there are a couple of filters that claim to reduce light pollution and or improve visuals of different types of nebulae. Do these filters work? And which one will (if they do work) work best for my scope (the standard 8" SW dob 1200/200)? -
Whilst using my canon with a 200p newt via the usual ring-adapter to focuser prime-focus, I want to add a light-pollution filter but cant figure out if I can use the 2 inch ep type nebula filters between the camera and scope or would need the more expensive 'clip' CLS filters. I dont use a barlow or a barlow type t-adapter - or any other filters - and have the 2inch adapter that comes with sw 200p scopes, but still not sure exactly how either type of lp filter fits between the cam and scope, anyone know how they are attached and what type I can use? Regards Aenima
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Hi there, I have a DMK21AU04.AS mono camera which I wanted to start using for planetary imaging & I was wondering which filter I would need. I already have a IR pass filter but I was wondered if a IR/UV cut filter would be better? Any advice is appreciated. Cheers, Jeff -
I have 15mm Vixen LV EP which I bought off Astroboot a few months ago. It's a great EP for viewing with, and used it mostly for whole sun views of the Mercury transit yesterday. My issue with it is I have some coloured filters that I use for mostly planetary views (although I used them yesterday too on the sun to aid views etc), but some of the filters I have when I screw them in to the EP either won't go in correctly, or get tight halfway in when threaded in. I've checked the internal thread on the collar of the EP and that seems OK, with no obvious burrs, or signs of cross threading. I've also tested out the filters that has this issue with the 15mm EP in all my other EP's and don't get any issue when I thread them in to those EP's at all. I think the issue maybe the black paint/coating applied to the thread on the EP is making it tight for the EP's themselves, and due to manufacturing tolerances in sizes some filters will thread in OK, and others don't. My question is is there a simple way to get rid of the black paint in the EP metal collar (only the first 3mm where the filter screws in). If I got some paint stripper and sat the collar in a dish containing some 3mm of solution will this dissolve the paint away OK? The only other issue with the EP is on most of my other EP's the metal collar that the filters screw into can actually be unscrewed from the EP itself. On the Vixen EP if I try to unscrew the collar it also starts to unscrew some of the lower lenses in the EP, and so don't want to unscrew the collar if this might damage the EP by dislodging any internal lenses or other components of the EP itself. Anybody ever tried to clean away this black paint on their EP's before succesfully if they had similar issues? Any advise is welcome.
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Before I continue, I do know ND is neutral density. But my question.... It seems to be common knowledge that a filter of level ND 5 is needed when viewing the sun. My ND filters for my camera are ND 2,ND 4, ND 6, and so on. So can I use one of these to view/photograph the sun? If not, what is the difference between my ND camera filters and the other ND filter/film sheets everyone bought for the eclipse? I'm sorry but I am new to any photography with telescopes. It's almost embarrassing to say it's been in storage. So, Thank you to anyone and everyone that can help! -
I'm thinking about buying a filter to improve the contrast on DSO's in my new 12". The question is, is there really a big difference between the UHC filters (baader, SW, etc) and the OIII filters? Will the OIII limit me to a certain amount of objects such as M27 and the veil? Thanks!
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Are the Baader LRGB filters parfocal with their narrowband filters, the Ha, O3 and S2 ones? I have Astronomik LRGB and Baader narrowband in my filterwheel. The narrowband filters need refocusing after LRGB which means I can't include then in an imaging sequence. I haven't managed to get autofocusing working in Maxim dl yet. I bought the LRGB first for a previous camera and then couldn't afford the 3nm Astronomik narrowband when I upgraded.
