Baader Planetarium - 2" 7.5nm Solar Continuum Filter

It's no secret that astrophotography enthusiasts and professional photographers alike seek the utmost clarity and contrast in their celestial captures. The Baader Planetarium Semi-APO Filter 2" is an innovative solution designed to enhance the visual quality of images taken with achromatic refractor telescopes. This high-quality filter effectively minimizes the distracting violet fringe that often diminishes the sharpness and contrast of astronomical images.Crafted with a potent combination of a stronger Fringe Killer coating and the Moon & Skyglow Neodymium substrate, this filter offers a performance akin to the synergy of the Fringe Killer and Moon & Skyglow filters, but with an intensified violet cut. The result is a filter that not only provides a significant value but also delivers a neutral view that maintains the natural color balance of the observed object.The Semi-APO Filter's high efficiency in fringe reduction is matched by its ability to remain inconspicuous in use. Its presence is virtually undetectable as it works to eradicate most of the violet aberration, leaving behind images that boast remarkable sharpness and enhanced contrast. Even users with smaller refractors will notice a substantial improvement in the aesthetic quality of their astrophotography.Moreover, the filter's Neodymium substrate goes beyond mere fringe reduction. It actively boosts color contrasts, particularly when observing planets such as Jupiter and Mars, due to its RGB enhancement capabilities. This makes the Baader Semi-APO Filter 2" a versatile tool in the astrophotographer's kit, suitable for capturing a wide array of celestial phenomena with increased detail and vibrancy.Durable and effective, the Baader Semi-APO Filter is a testament to Baader Planetarium's commitment to providing innovative optical solutions that cater to the discerning needs of astronomy enthusiasts. Whether you're capturing the grandeur of the night sky or honing in on planetary details, this filter is an indispensable asset for achieving high-contrast, sharp, and aesthetically pleasing astrophotography results.

Take your solar imaging to the next level with the Calcium Gen-II 1.25" Unstacked Ca-K Solar Imaging Filter with LPFC. This advanced filter allows you to explore the fascinating boundary region between the sun's photosphere, visible in white light, and the chromosphere, typically observed with narrow-band H-alpha filters. With the Calcium Gen-II filter, you can observe not only familiar white light structures like sunspots, but also the chromospheric network that covers the sun's entire surface. This network is a precursor to sunspot formation and is accompanied by supergranulation cells and Ellerman Bombs. The filter operates at the emission line of calcium at 394 nm, which is in the near UV spectrum. As such, it's crucial to remember that this filter is designed for camera use only, as the human eye is not equipped to safely handle UV radiation. For optimal results, we recommend using this filter with a monochrome camera and mirror telescopes. While many lens telescopes can still be used for calcium observations, unmodified DSLRs may require significantly longer exposure times. All calcium filters necessitate an additional solar filter. The Baader GEN-II package includes a sheet of AstroSolar Photo Film OD 3.8, 20x30 cm (#2459278) to construct your own solar filter, allowing you to start observing without the need for additional purchases. The Calcium Gen-II filter supersedes the older K-Line Filter 1 1/4" (stacked) # 2458355. Thanks to modern manufacturing techniques, this single filter provides superior quality and a narrower half-band width (FWHM) of only 5 nm, eliminating the need for filter stacking. The low-profile filter mount is only 6 mm high when screwed in, making it compatible with standard filter wheels/drawers. For cameras with a 2"-nosepiece, the filter can be used with a filter drawer like the Baader UFC System or a filter wheel. The Baader Calcium GEN-II boasts all the benefits of the new generation of CMOS-optimized Baader filters, including increased contrast, Reflex-Blocker coatings for maximum halo freedom, identical filter thickness for parfocality, blackened edges for reflection elimination, individually coated filters with sealed coating edges, and Life-Coat for a durable, non-aging coating. In summary, the Calcium Gen-II 1.25" Unstacked Ca-K Solar Imaging Filter with LPFC is a powerful tool for any solar imaging enthusiast, offering a unique perspective on our sun's complex and captivating features.

Mounted Filters with Baader AstroSolar Safety Film OD 5.0 After 15 years of offering AstroSolar film sheets as DIY-product, this system of Baader Solar Filters is designed to retain the true optical quality of the diffraction limited AstroSolar Safety Film. Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar Safety Film OD 5.0. Many ready made filters do stretch the filter material like a drumhead in order to make it look like a piece of glass - this absolutely does destroy the image quality, rendering the film useless for high magnification work. AstroSolar must be mounted entirely stress free in order to perform like a high precision plane optical window. It sounds like a contradiction with traditional perception of quality, but AstroSolar must show slight ripples! Only when the film is being put under stress by an improper cell mount it performs just like any single side coated glass-filter made of untreated float glass. Original Baader AstroSolar Safety Film (OD 5.0), cell mounted and quality inspected by skilled members of their staff Clear white IR-rejecting front ring with reinforcing raised edges along the outer and inner circumference, designed to protect the solar filter material from contact with any sharp metal edge No tool mounting and adjustment of the centering bolts to fit a wide variety of mechanical tube diameters. Bolts made to contact the outside or optional (if appropriate) the inside of the optical instrument tube Non-rotating sliding fasteners made from aluminum that hold the centering bolts. These metal sliders are equipped with a machined indicator to point towards the adjustment index Additional Phillips screws are integrated into the sliding fasteners, so that the centering bolts can be firmly fastened with a screw driver if preferred by the user Index scale provided beside each adjustment slot - adjacent to each sliding fastener, for fast and repeatable adjustment of the filter cell onto different telescope tubes Black sliding washers supplied to securely cover the full length of the adjustment slots in the aluminum frame - for blocking sunlight from passing trough the filter cell beside the filter area Three security straps included, to secure the position of the filter cell with Velcro-adhesive pads. A safety feature to absolutely ensure a secure fit in front of the telescope under any circumstances (gust of wind asf) Warning text printed onto the front side of each filter cell: Read the Instructions before use Cardboard gift box fit for safely shipping the filter ASTF (AstroSolar Telescope Filter) Baader Solar Filter for high-end Telescopes This family of solar filters is made in the most elaborate way. AstroSolar must not be put under stress, neither during mounting the film, nor during any temperature change. For this reason the ASTF-Filter features a temperature compensated cell. The film itself is repeatably cemented onto an injection molded ring, whereas the substrate of that ring has the same thermal expansion like the Astro Solar Filter material itself. This free floating film-carrier ring is held onto the aluminum frame with the help of another holding ring made of fiber reinforced plastic - for a maximum of security against breaking of the cell. This temperature compensated cell enables the AstroSolar filter material to retain its excellent optical quality at any temperature - be it -30Deg C or +50Deg C. Safe for solar observation and photography with all high-end telescopes and extreme tele-lenses. Suitable for highest magnifications and detailed observation of individual sunspots AstroSolar Safety Film OD 5.0, mounted stress free in temperature compensated cell No astigmatism during winter observation or with temperature changes in summer Scope of supply: ASTF Filter come with two sets of centering bolts in 38mm length. 3 bolts with 10mm diameter and 3 bolts with 20mm diameter, adjustable to the tube diameter of your telescope or dew cap.