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Howie Glatter Holographic Concentric Circle Attachment


$110.00

Call 1(610)327-3500 for availability

SKU: SI-HOLA-CIRCLE
Manufacturer: Howie Glatter

Quantity
Howie Glatter Concentric Circle Projection Attachment. A brighter pattern spanning 10 degrees, best for Cassegrain scopes slower than f/5.6 The nine-concentric circle pattern is available that spans 10 degrees and will reach to the edge of f/ 5.7 optics. This pattern is recommended for scopes around this focal ratio or slower. Because the laser light is spread over a smaller area it is brighter than the square grid pattern, and this makes it particularly useful with Cassegrain scopes, where the pattern impact is sometimes scrutinized on the mirror surfaces. The projected pattern is seen only by light that is scattered from dust, dirt, or optical roughness, so a brighter pattern is better, especially if the mirrors are very clean.

Availability Notice

Howie Glatter products are now being produced by Starlight Instruments, makers of the Feather Touch focuser. This item is expected to be available by the end of November, 2017.

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1 Most useful customer reviews
Keith K.
Mar 3, 2019
Promp delivery but it turned out to be defective,. Was issued a refund within 30 minutes of my first email! Fastest response from ay company, ever.
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