Interference Eliminator (C mount)
- Regular price
- Price: $199.99 USD
- Regular price
- Sale price
- Price: $199.99 USD
- Unit price
Estimated Arrival: Between Dec 31 and Jan 14. United States
Ships within 4-7 days
- Shipping & Returns
- Price Match
- Product Q&A
Photographers imaging in monochromatic light, such as Hydrogen Alpha, using an electronic sensor frequently encounter a wavy pattern of light and dark lines superimposed over their images. These lines are called interference fringes, interference patterns, or Newton's Rings. In long focal ratio applications, the nearly parallel light can internally reflect inside the image sensor or camera, causing an addition or subtraction of the light waves, resulting in the observed pattern.
The Interference Eliminator solves this problem by tilting the camera off normal while keeping the center of the image sensor stationary, so that focus, framing, and vignetting are not changed with the tilt. The tilt changes the angle of incidence and optical path lengths inside the image sensor, mitigating the interference.
Left: normal, problematic image. Right: With Interference Eliminator.
Telescope/filter: DayStar SolaREDi, tuned off band. Camera: Canon EOS 5D.
Installation & Use:
Installation: The Interference Eliminator should be placed directly in front of the camera in the optical train. For proper operation, the distance from the flange of the male C thread to the camera focal plane should be 17.5mm. On a C mount camera, no spacers are required, but a CS mount camera will require a 5mm spacer for best effect. If the distance is significantly different from 17.5mm, the camera will move off boresight and the focus position will shift while adjusting the Interference Eliminator tilt setting.
Use: Slightly loosen the thumbscrews and slide the two halves of the Interference Eliminator apart, such that the camera tilts. Take a few images with the camera to check for the interference pattern. Slide further apart if the pattern is still evident. Tilt it the minimum amount to eliminate fringes - too far and focus could be lost at the top and bottom of the image, especially in fast focal ratio systems. If maximum tilt is reached without satisfactory effect, try full tilt in the opposite direction. In some severe instances the interference pattern may not be completely removable, but it will be reduced to where other techniques such as flatfielding or compositing can make the image acceptable.
Camera compatibility: Digital cameras such as Pt. Grey, Lumenera, Imaging Source, and many more CCD and CMOS cameras.
Telescope/filter compatibility: Recommended for long focal ratios (F/30) such as DayStar Filters.
Thread: Male/Female 'C' thread, 1-32 UN.
Additional back focus required: 16mm.
Radius of curvature: 27.5mm.
Recommended distance to focal plane: 17.5mm from male C flange. (Exact for C mount cameras).
Range of motion: +/- 5 degrees.
Weight: 0.1kg (0.2 lb) CNC machined aluminum.
Maximum camera weight: 3.5kg (7.7lb)
Shipping & Returns
If your order is in stock and we process the charges to your credit card, it will ship within five business days from the date of your order. We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out. If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at email@example.com.
Cancellations & Refunds:
All orders canceled after 48 hours are subject to a $20 administration fee, whether or not your order has shipped. If your order has shipped, you (the buyer) will also be responsible for actual return shipping charges. Refunds will only be issued to the original credit card that you use when placing your order.
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Product Warranty Policies
We also offer warranties from each of our partners (to ensure that you enjoy the products as much as we do).
Vixen's Warranty :
Vixen warranties its products to be free from initial defects in materials and workmanship for a specified period based on part type:
- Vixen Electronic Parts: Limited One Year Warranty
- Vixen Mechanical Parts: Limited Two Year Warranty
Interested? Shop for all of Vixen's products here.
Bresser's Warranty :
Bresser offers a limited USA one year warranty when product is registered within 60 days of purchase. Interested? Shop for all of Bresser's products here.
Explore Scientific's Warranty :
Explore Scientific offers a limited USA one year Warranty, which also converts to the Explore STAR Transferable Extended Life of the Product Warranty. Product must be registered within 60 days of purchase for this warranty to apply.
Interested? Shop for all of Explore Scientific's products here.
Daystar Filters's Warranty:
If used as directed, your DayStar filter is guaranteed for ten years. Should the filter become inoperative due to optical or mechanical failure, Daystar will repair the filter or replace it with an equivalent filter at no repair cost to the customer.
Under no circumstances shall a refund be issued:
- due to application issues or the buyer's lack of skills in application of the product
- Application of the DayStar product requires a degree of technical expertise specific to the exact product line, which is not common to other optical applications
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- due to buyer’s remorse
Goods are warranted to be in operative, working condition as stated in specifications of product at the time of delivery. Should the goods not meet these specifications, Telescope Wolves will put a request in on your behalf to repair or replace the goods with items which meet stated specifications of product.
- Goods shipped shall meet specifications stated by means of optical laboratory testing using independently verified spectrometer testing methods, visual inspection, and visual qualification of performance.
Interested? Shop for all of Daystar Filters's products here.
Hutech offers a one year warranty on all its products.
Interested? Shop for all of Hutech's products here.
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