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Astrozap Baader Solar Filter with Notch for Meade 8" LightSwitch LS & LT and 225 mm - 235 mm OD Telescopes - AZ1004-LS
To ensure that the solar filter you buy will fit properly, please take a few moments and measure the outside diameter of your telescope, spotting scope or binoculars before you order. Remember, the solar filter needs to fit snugly around the front of the tube assembly that holds the optics. If the filter is slightly larger than its diameter, the filter can be made to fit by the addition of self-stick felt spacers to the inside of the cell. However, if the filter is too small it will not fit, and that would be a shame. So please, measure before you order. Thanks.
AstroZap Baader Solar Filter w/Notch for Meade 8" LightSwitch LS/LT and 225 mm to 235 mm OD Telescopes
This Astrozap Solar Filter with Baader AstroSolar™ Film fits telescopes with a 225 mm - 235 mm outside diameter range, including Meade 8" LightSwitch LS and LT. Please be sure to measure the outside diameter of your optical tube for confirmation prior to placing your order.
AstroZap Baader AstroSolar™ Film Filters
By using an AstroSolar™ Film filter, the Sun will be displayed in neutral white, contrary to other films and some glass filters which generate a blurry bluish or reddith Solar image, thus removing a portion of the spectrum. Faculae regions, visible primarily in the blue wing of the spectrum, can be extremely difficult to see, especially with an orange sun.
Because of it's neutral color balance, AstroSolar film allows for the use of a variety of color or interference filters, providing observers with the ability to focus on specific spectral passbands for exploring the diverse layers of the solar "atmosphere."
AstroSolar™ is basically pinhole-free due to its double sided coatings, significantly reducing the likelihood of two pinholes overlapping each other. Coatings on both sides is typically a feature found only with the most expensive glass filters. Pinholes may still appear, but to only 1 out of 10,000 in optical density 2.5! The National Bureau of Standards in Germany (PTB) has approved Baader AstroSolar™ Safety Film for eye safety. AstroSolar film is CE-tested per EG-Norm 89/686 and EN 169/92 (notified body 0196), contrary to any other available solar filter. All processes related to this filter have been extensively tested. Coatings are regularly inspected for consistency for guaranteed eye protection!
AstroZap Baader AstroSolar™ filter cells are designed from lightweight 18Ga. aluminum with powder white coatings, heavy-duty threaded inserts, and nylon thumbscrews to secure a solid fit.
What About Your Finderscope?
Adding this solar filter to your telescope will adequately filter the light coming through your focuser, but have you considered what you’ll do about your finder scope?
Here are some suggestions for dealing with your finder that will assure you do not damage your eyes (or anyone else’s) by looking at the Sun through your telescope’s unfiltered finder:
- Remove Your Finder. Ditching your finderscope when solar viewing will remove the possibility of someone accidentally looking through it to spot the Sun. Of course, not having a finder makes centering the Sun in your eyepiece more difficult, but with practice, it can be done. Set the mount down so the telescope is pointing in the direction of the Sun. Put the main solar filter on so you can check your progress, and then move the telescope around until it casts a shadow that produces a nice, sharp silhouette of the scope. The OTA will look circular. Now move your telescope up or down with your hand controller, slow motion controls, or very carefully by hand if required while looking through the eyepiece. You will not get a warning when you are close, but you should be able to align with the Sun using this method. Practice ahead of time before any big event, like an eclipse, to make sure you’ve got the process down.
- Filter Your Optical Finder. This solution is not recommended for a reflex or red dot finder since it is too easy to accidentally look around the window. If you have one of these finders we recommend you either remove it or replace it with a dedicated solar finder (see below).
To make your optical finderscope safe for solar viewing you’ll need to buy a piece of Baader Solar Film for Visual Use. This film comes in different size sheets and cuts easily with scissors, allowing you to make your own filter. You can go super low-tech and use a rubber band to hold a piece of the film firmly around the finder or you can get fancy and build your own slip-on solar filter. However you attach the solar film, you need to make sure there are no light leaks at all and that it doesn’t accidentally fall off when you move your telescope around. Any unused film can store flat between two pieces of cardboard and will keep for years. It is nice to have around, just in case of a solar emergency :-)
- Buy a Dedicated Solar Finder. Check out the Tele Vue Sol-Searcher Solar Finder. This special finder can only be used when observing the Sun, but it works very well. The Sol-Searcher is reasonably priced and can be attached to your telescope with Velcro or with #10-32 screws (user supplied).