Baader Planetarium 7.5 nm Solar Continuum Filter 1.25" & 2" (2961580/2961581)
Baader Planetarium 7.5 nm Solar Continuum Filter 1.25" & 2" (2961580/2961581)
Size
Why Purchase from All-Star Telescope?
Free Expert Support
Whether you are a first timer needing help with setting up or an enthusiast that can't quite make that one thing work, our expert staff are ready to support your needs. With decades of knowledge and first hand experience we've been there and we can help you through it!
Stress Free, Secure Transactions
You can trust purchasing and delivery with All-Star Telescope. All of our transactions are 100% secure and Level 1 PCI DSS compliant thanks to Shopify's ShopPay platform. For additional protection, we insure 100% of the value of every shipment we make. If it get's lost during shipment, we replace it. If it gets damaged during shipment, we replace it. We make sure your product arrives exactly as you would expect it to; we promise.
We also ensure privacy protection. We never keep any of your credit card information on file and any of your personal data is stored according to our policies.
30 Day Return Policy
Buy with confidence knowing that we accept returns up to 30 days after purchase. We want you to have something you will actually use and we are confident that we keep good quality products in our store with No Junk.
Price Match Promise
Shipping around for the best price is tough, we make it easier by offering the best pricing in the market. But if you find a better price on an in-store item somewhere else we will match it!
Product Description
Baader 7.5nm Solar Continuum Filter – for Visual and Photographic Observations of the Sun
The Solar Continuum Filter is practically a narrow band photosphere filter for solar observation in white light. It provides the highest contrast in the photosphere of the sun. The filter works as a monochromator: suppressing the effects of the atmospheric turbulence and delivering images that are significantly sharper.
Lens systems - including those of apochromats, catadiopters or eyepieces - are traditionally optimized for the spectral range around 540nm, since this is where our eye has the highest sensitivity. This narrowband filter therefore blocks everything with the exception of the spectral range in which a lens optic works most sharply and with the highest contrast. The effect is greatest on achromatic lens telescopes; but there is also an effect on apochromatic telescopes, catadioptric systems, and even pure mirror systems by reducing air turbulence.
As a monochromatic filter, it is ideal for use on monochromatic cameras and can even provide a tremendous gain on pure color systems.
With a colour camera, as with deep-sky narrow-band photography, it is less effective as only the green pixels are used. Thus, although you still benefit from the improved image sharpness of the telescope that is optimized for green wavelengths (and the reduction of the influences of air turbulence), with a colour camera you cannot fully exploit the better image quality compared to monochrome cameras, as you are effectively working with reduced camera resolution.
Compared to the previous model with a 10nm half-band-width, this filter has a half-band-width of only 7.5nm, which increases the contrast even more. It thus replaces both the previous Baader 10nm Solar Continuum filter and the stacked 1.25" filter #2458392. The single filter is so good that stacking is no longer necessary - the contrast gain of a single 7.5nm filter makes stacking unnecessary, and this performance is now also available in 2".
The Baader 7.5nm Solar Continuum filter is also be included in the scope of delivery of the Der Baader 7.5 nm Solar Continuum Filter gehört auch zum Lieferumfang des Baader 2" Cool-Ceramic Safety Herschelprisma Mark II (Visuell / Fotografisch).
Features
- Increased Contrast matched for typical CMOS quantum efficiency and s/n ratio
- Reflex-Blocker Coatings for largest ever freedom from halos, even under most adverse conditions concerning aux-optics
- Identical Filter Thickness to existing standards, with utmost care for parfocality
- Blackened Edges All Rround with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter
- Each Filter Coated Individually with sealed coating edge (NOT cut out of a larger plate with coatings left exposed, read more)
- Life-Coat: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment
Warning: This is NOT a solar filter. The Solar Continuum Filter must be used for purely VISUAL solar observation ONLY with additional filtering (e.g. Baader Herschel prism or AstroSolar Safety Film).
Specifications
| Manufacturer | Baader Planetarium |
| Net Weight (Kg) | 0.01 |
| Transmission Range | 535-545 nm |
| Central Wavelength (CWL) | 540 nm |
| Filter Thickness (without Cell) | 2 mm |
| AR-Coating | Reflex-Blocker™ hard coated, planeoptically polished |
| Filter Size | 1.25 and 2 inch available |
| Filter Usage | CMOS, Contrast Enhancement, Solar |
| Filter Mounted | Mounted (LPFC 6mm) |
| Tyor of Filter | Narrowband |
| Single or Set | Single Filter |
| Filter Shape | Round |
