DayStar Filters Interference Eliminator (T-Mount)

BH #DAMG0408 • MFR #MG0408
DayStar Filters
DayStar Filters Interference Eliminator (T-Mount)
Key Features
  • Use for Solar Photography
  • Limits Newton's Rings Interference
  • Changes Angle of Incidence up to 5°
  • Recommended for Long Focal Ratios
When photographing the sun in monochromatic light, such as H-alpha, a common issue is the appearance of lines on the resulting image caused by light reflection inside the DSLR camera's imaging sensor. Daystar Filters' T-mount equipped Interference Eliminator tilts the camera off-normal by up to 5° while keeping the center of the image sensor stationary, so that focus, framing, and vignetting are not affected. This tilt changes the angle of incidence and optical path lengths inside the image sensor, mitigating or eliminating the interference. These lines, called interference fringes, interference patterns, or Newton's Rings, are caused in long focal ratio applications, by nearly parallel light being internally reflected inside the image sensor or camera, causing an addition or subtraction of the light waves. The Interference Eliminator can hold a camera rig up to 7.7 lb and is recommended for long focal ratios, f/30 ideally, as seen in most Daystar filters.
Special Order
Expected availability: 7-14 business days
$175.00
SAFETY FIRST: Observing the Sun without the proper protection may result in serious personal injury, including permanent eye damage and blindness, and/or damage to equipment. Never point an optic at the sun without an approved solar filter on the front of the optic. For direct solar viewing, viewing the sun through an optic, or when using cameras with an optical viewfinder, ensure your filter is ISO 12312-2 (also written as ISO 12312-2:2015) certified. Never use photographic neutral density filters for direct solar viewing, viewing the sun through an optic, or when using cameras with an optical viewfinder.

David S., B&H Optics Expert

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DayStar Filters MG0408 Overview

When photographing the sun in monochromatic light, such as H-alpha, a common issue is the appearance of lines on the resulting image caused by light reflection inside the DSLR camera's imaging sensor. Daystar Filters' T-mount equipped Interference Eliminator tilts the camera off-normal by up to 5° while keeping the center of the image sensor stationary, so that focus, framing, and vignetting are not affected. This tilt changes the angle of incidence and optical path lengths inside the image sensor, mitigating or eliminating the interference. These lines, called interference fringes, interference patterns, or Newton's Rings, are caused in long focal ratio applications, by nearly parallel light being internally reflected inside the image sensor or camera, causing an addition or subtraction of the light waves. The Interference Eliminator can hold a camera rig up to 7.7 lb and is recommended for long focal ratios, f/30 ideally, as seen in most Daystar filters.

UPC: 030955193502

DayStar Filters MG0408 Specs

Back Focus15 mm, required
Distance to focal plane: 2.2" / 5.5 cm from male T-flange
Range of Motion± 5°
MountT, for DSLR cameras
MaterialAluminum alloy
Dimensions3.3 x 2.4" / 8.3 x 6.0 cm, ellipse
0.9" / 2.2 cm thick
Weight3.2 oz / 90.7 g
Packaging Info
Package Weight0.4 lb
Box Dimensions (LxWxH)3.8 x 3.4 x 3.3"
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