Home > Filters > By Brand > Antlia
Model: ANT-3.0SII-36PROBrand: Antlia
Generally In Stock, Please Confirm Before Ordering
The Antlia SII 3.0nm filter is suitable for imaging SII emissions from nebulae, planetary nebulae and supernova remnants.The 3.0nm bandwidth delivers a high transmission at a center wavelength of 671.6nm. The extreme narrowness in bandwidth enables astro-imaging from heavily light polluted locations and delivers improved contrast at darker sites. The filter effectively suppresses interference from other wavelengths, especially artificial mercury and sodium lamps.Antlia narrowband filters are designed to bring out the faintest features in nebulosity by reducing the unwanted background frequencies. The narrower the filter, the better. Our SII filter is designed to deliver 90 % transmission at the 671.6nm line. The out of band blocking specification is rated OD3 (0.1%) which delivers an excellent signal to noise ratio and effective cut off rate to minimize interference from other wavelengths.A sharp cut off rate is a very important performance index since it is designed to sharply attenuate off-band wavelengths. The result is that the Antlia SII filter delivers excellent contrast with extremely dark backgrounds whilst delivering a high transmission of the SII signal. The sharp cut-off also minimizes the effect of halos around bright stars.In the production process, we use very strict quality control standards. Each filter is individually tested and scanned to ensure that the product meets our high-performance parameters. Our exacting attention to tolerances requires each substrate to have a uniform thickness that achieves no more + -0.05mm deviation from specification.
Application and Performance:Ultra-narrow 3.0 nm bandwidths, designed for astronomy imaging in both light polluted areas and at dark sites；Suitable for imaging of SII emission in nebulae, planetary nebulae and supernova remnants;With the Ha, SII, OIII set of filters you are able to process your images to achieve the impressive Hubble color palette;High transmission of typically 90% and sharp cut-off delivers an excellent boost in contrast for SII emitting objects;All Antlia Narrowband filters are edge blackened to minimize interference from stray light;This filter is not suited to deep sky objects that do not contain SII emissions. It can be used to image SII regions in galaxies and such images can be combined into LRGB images to better highlight the SII emitting regions of galaxies.
Technical Data:Schott optical substrate1.25”, 2” mounted, 31mm,36mm dia (2mm+/-0.05mm)50mm dia，50*50mm，65*65mm square (3mm+/-0.05mm)Surface Quality: 60/40 (Refer to MIL-O-13830)2 sides fine-optically polished to ensure accurate 1/4 wavefront30 arcsec parallelismCenter-Wavelength of Antlia SII 3.0nm filter: 671.6nmSII 671.6nm T＞90%, 90 % transmission at H-Alpha line at 656.3nmOD3（0.1%）@ 300-1000nmBoth sides with multi-layer anti-reflection coatingSingle / Non-glued substrateFilter Cell (specifications for cell mounted filters only):1.25” (M26*0.6)，2” (M48*0.75)Ultra-thin filter cell to minimize vignetting by maximize possible clear apertureBlack Anodized FinishNon-Fading Laser EngravingAvailable Sizes：Mounted： 1.25” & 2” (2mm thickness)Unmounted：Dia 31mm，Dia 36mm (2mm thickness)Unmounted：Dia 50mm (3mm thickness)Unmounted：50*50mm，65*65 square (3mm thickness)Not Recommended:Solar Observing and imagingVisual observationIMPORTANT! DO NOT LOOK AT THE SUN WITH ANTLIA FILTERS.Serious eye damage will result if you fail to observe the warning.
Be the first to Write a Review for this item!
Some items that are showing as in stock are in stock at our holding warehouses, not at the shop. To double check the stock levels at the shop, please contact us on 01909774369 or email@example.com.
The delivery times for most items is 1 - 2 days but again, please double check stock levels on important orders before placing an order via the website.
The delivery costs for courier next day are for mainland UK only. If you live in the Scottish Highlands/Islands, Channel Islands or Northern Ireland, then a shipping surchage will apply. please contact us for prices. Smaller items can still go 1st class via Royal Mail.
Please note that if you are wanting to take advantage of our Saturday and Sunday timed services or next day pre 12 or pre 10:30 services, you MUST check that the stock is here at the shop before placing orders. Also, orders using the Saturday and Sunday services must be placed before 1pm the previous working day. Also, please remember to check that the stock is here at the shop before placing orders. If the stock is not at the shop, we won't be able to ship on any of the timed services.
Please note International customers will need to contact us for a shipping price prior to ordering via the website. We don't ship all items internationally. It is at our discretion what we ship outside of the UK. This all depends on the size and weight of the items. Please get in touch with us for any postage costs. Please note we do NOT ship telescopes or heavy items outside of the UK. This is due to massive postage costs and problems regarding returns.
If you have any questions regarding stock levels or delivery, please get in touch.
Rother Valley Optics now have a loyalty point scheme active on the website. As you can see from the products, every item has a point value. Each pound you spend with us, you will receive 1 loyalty point. 1 point is worth 1p. You can accumulate these points as you shop with us, then when you are over £5, you can spend them on the website! Easy as that.
Even if you collect most of your items from our shop, you can still order via the website and select the "shop collection" delivery option. Then you can come to our shop, collect your item and still get your points!
Please note this scheme is online only. Customers who order via the telephone can still be added to the scheme manually. Please ask for more details on this. Before placing orders online, please make sure you are registered with us first otherwise your points won't be allocated.
So happy shopping and if you have any questions about the scheme or any other queries, please get in touch.
Rother Valley Optics
Finance is now available on most products above £250! We offer 12, 24, 36 and 48 months with a fixed 15.9% typical APR. Please note this can't be done through the website at this moment in time. You will need to email us or drop into the shop to sort out finance. As long as the item is above £250, finance is generally available!
Please note some items are NOT eligible for finance. Please contact us for eligibility first.
Please get in touch with us today to find out if you're applicable.
You must be over 18 years to apply, live in the UK, have a valid UK bank account and not be bankrupt. Your credit file will be searched on application to see if you are eligible.
Rother Valley Optics Ltd is registered in England and Wales 04762707. Registered Office: 21 Station Road, Kiveton Park, Rotherham, S26 6QP. Rother Valley Optics Ltd acts as a credit broker only. Rother Valley Optics Ltd are authorised and regulated by the Financial Conducts Authority. Credit provided subject to age and status..
If you have any questions about this, simply give us a ring or drop into the shop for a chat.
- - - Rother Valley Optics Ltd
01909 774 firstname.lastname@example.org
Are you interested in this product but would like to speak to someone with some more information? Simply fill in the form below and we will get back to you as soon as we can!
*NamePlease enter your full name*Telephone NumberPlease input your telephone number here*Model NumberPlease enter the model number which is just aboveAdditional InformationPlease include any information here that will help our staff members assist your query*Please add the two numbersSubmitSubmit
*NameYour name*Contact InformationPlease enter your email address or telephone number here so we can contact you about the price match*URL of competitors websitePlease enter a link here to the item where you have seen it cheaperAdditional InformationAny additional information can be inputted here*Please add the two numbersSubmitSubmit