Swan Extra Slim Filter Tips - Full Box Of 20 Total 2400 Tips

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Each filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed, read more) They say that if only one cosmetically flawless, smooth glass surface is required, it is not necessary to achieve a high degree of plane-parallel polish. They further believe it is adequate to cut filters from a big stained glass sheet – usually in the format 20x20 cm – and to so-called “raw polish” the filter on both sides. With this process, the glass surface is slightly molten and all saw scratches and surface inaccuracies are invisibly levelled. But so-called „raw-polished“ glass surfaces are completely irregular and deform the wave front of the light significantly! In the old days, colour filters for visual planetary observations were not screwed in the front part of the eyepiece, but were simply placed between the eyepiece and the eye. Plane-parallelism of these filter glasses was not important, because they were not in the optical path of the telescope. High quality optical filters are not cheap. Hence, it is also no surprise if observers complain about „unaccountable“ picture deterioration when using cheap filters in front of binoculars, tele-compressors or Barlow lenses, either visually or photographically. The higher the magnification, the softer and more blurred the picture appears when using a cheap filter, for both visual and photographic observations. This is our own proprietary "emergency solution" for uniting a world were manufacturers all over the world copy from each other - to the point that there are almost a dozen different pitches in use for male and female threads. Traditionally US-companies used to do a UNF-based pitch and the rest of the world went for metric threads - but these do vary from 0.5 to 0.75.

Baader filter boxes can be attached laterally and above the other to create a sturdy unit. Each filter is then neatly in it's own drawer and characterised from the front with name, number and size of filter. What do you look for in an astronomical filter? Everyone has different requirements and goals and with a myriad of filters available today; how do you choose the right filters to unleash the full potential of Astrophotography? By combining the Swan-Band and luminance filters, I was not only able to work out fine details down to the nucleus of the Comet in the subsequent image processing, but also the carbon that was excited to glow became clearly visible in the final image with the help of the Swan-Band filter. The Baader C2 SWAN-Band-Filter with ≤ 15 nm Half-Band-Width isolates the two C2 lines at 511 and 514nm. Make sure all items returned are complete; any incomplete items will not be credited and will be classed as unauthorised.The sad effect is that we cannot offer other sizes unless the inquired production quantity were in the range of 250 to 500 pc (depending on size) and the tooling rings or square holders will be paid for, which serve to precisely center each individual filter substrate within the rotating calotte inside the coating chamber. Sorry - as explained above - we just will not coat onto large plates and cut any shape from them, also because such large plates cannot be polished optically flat in the same way we do it. Christoph Kaltseis is a Photoshop expert and an experienced astrophotographer. In recent years, he has developed APF-R (Absolute Point of Focus), an innovative image sharpening process in Photoshop that has attracted considerable interest among experts. The Hubble Space Telescope team has been using his method for over 2 years.

If you receive any damaged items on your delivery, please state the full extent of the damage on the driver’s delivery note when signing for the goods. Der Himmelshintergrund war mit dem Baader-Filter deutlich dunkler, das Bild ansprechender. In etwa wie der Vergleich von UHC (ohne S) und [OIII] an Nebeln. Das war von den Bandbreiten her auch zu erwarten. For our CMOS-optimized filters we have created the following images showing which side of the filter should face the telescope. Lumicon hat 25 nm Halbwertsbreite und erfasst die [OIII]-Linie mit, ist also auch als [OIII]-Filter zu benutzen. Der Baader-Filter ist nur 15 nm breit und blendet diese Linie aus. Dieser Fakt allein wird wohl an einem Kometen nichts machen, wenn er nicht gerade vorm Zirrusnebel steht :) Eine geringere Halbwertsbreite heißt aber höherer Kontrast. I just bought LRGB 36mm unmounted filters. I have question: which side of filter should be placed towards telescope? Is it better way of distinguish than "more shiny surface towards telescope"?Our 1.25" filters have a M28.5 male (and M28.5 front female) thread / our 2" filters have a M48 male (and M48 front female) thread