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Baader Premium Colour Filter Set 2 Inch

Baader Premium Colour Filter Set 2 Inch

Transmission efficiencies for the three longpass-filters (Yellow, orange and red) peaks at 98 %, while the efficiency for the three bandpass-filters peaks at almost 70 percent - unheard of for a simple coloured glass-filter. All filters have standard 2" eyepiece filter threads, tested and optimized to fit allmost all eyepieces on the market. Each filter cell has a male as well as a female thread to allow stacking for narrower passbands.

Fine optical polish and 2 mm thickness allows these filters to be inserted anywhere into the optical path without introducing astigmatism or other optical defects or abberations. For instance they can be used in front of a binocular viewer without degrading the image in any way. Substrates are free of striae and plane parallel polished to within 30 seconds of arc. This eliminates any double images or ghosting due to wedge errors in the glass.

The set comprises three longpass and three genuine bandpass filters, which act similar to a nebula filter, so that only a small portion of the visual spectrum is transmitted to emphasize certain planetary surface detail.

The set consists of following colours:

Dark Blue (435 nm)
Bright Blue (470 nm)
Green (500 nm)
Yellow (495 nm)
Orange (570 nm)
Red (610 nm)

Our standard delivery charge for most of the UK is £2.95. All orders are shipped promptly, lower value items are sent Royal Mail 1st class and higher value or larger goods are shipped via reputable courier. All goods are shipped fully insured with FEDEX, UPS, DPD and Royal Mail, we do not use budget courier services, please note we can only ship to UK mainland addresses. We are not able to ship to forwarding agents or PO boxes.

Our Order Lookup system (see very top of each page for the icon and link) updates the order status in real time for you - simply by entering your order number and postcode..

We hold stock, dozens of telescopes and literally thousands of accessories that we ship out each business day, normally orders received before lunch are shipped that business day. We also direct ship from our UK suppliers, this means we have access to thousands of products that can ship fast to our customers.

Deliveries to UK mainland addresses are all shipped with fully insured premium services for £2.95, *some exceptions apply including many AB, FK, HS, IV, KA, KW, PA, PH, ZE postcodes. We will quote delivery charges to these areas where applicable prior to shipping (this does not normally affect lower value items shipped by Royal Mail).

You must inform us within one working day if the goods are lost or damaged in transit so that we can make a prompt claim against the delivery company and correct the problem. Please ensure all address details are accurate, we cannot be responsible for failed deliveries or losses arising from incorrect delivery addresses.

You agree that proof of delivery supplied by our delivery company is sufficient evidence to establish that goods have been received.

If your product is sent by Courier they will attempt delivery twice and a signature will be required. If they are unable to deliver because you are not available and after 5 days you have not contacted them to re-arrange. the goods will be returned to us and the return delivery costs may be charged to you

Baader Premium Colour Filter Set 2 Inch

MPN: 2458310





Price: 319.00

OUT OF STOCK


All the substrates of these 2" premium filters are fine optically polished. These filters by far supersede the mediocre quality of common "flame polished" colour filters. These superb filters will complement any serious planetary observers instrument.




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