Daystar Flat Cap Imaging Diffuser

Note: Newton’s Rings or intereference fringes will not be corrected by flat fields; use our Interference Eliminator adapter to remove these before performing flat field correction.

• Warning:  
The Daystar Flat Cap is NOT a solar filter.
Not for use in a concentrated beam, FlatCap must be the first component to encounter light.

This is a not a solar filter, eye or equipment damage will result unless used in combination with a safe solar filter or solar telescope.

Technical Specifications

FlatCap is sold by inside diameter of the mounting cap. Measure the outside diameter of the frontmost component of your telescope or ERF, and then round up to the next larger size. For example, a telescope with a 160mm front should use model FC170, and then optionally install the included felt pads for a secure fit.

Construction: Spun Aluminum mounting ring with polymer diffuser
Intensity distribution: Gaussian
Divergence angle: 4 degrees FWHM
Exposure time adjustment factor: 100x longer
Maximum field of view: 1 degree with Sun backlight
Wavelength transmission range: 350-800nm
Operating temperature: -10 to 100°C (14-212°F)