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TOP ARTICLES
  UV/IR Cut Filter application for Refractors
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  Imaging In Hydrogen Alpha with Color CCD Cameras
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  SCT Telescopes - ERF and Aperture Reduction
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  How to configure a DayStar on a refractor
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  My T-scanner is showing a blank red disc.
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All articles tagged with ERF
SCT Energy Rejection Filters Category: Energy Rejection Filters
Posted on Apr 20, 2011, 10:23 pm Author: Jen Winter
Off Axis Front Mount Energy Rejection Filters for SCT Telescopes
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Tagged Keywords: Schmitt, Energy Rejection, Filter, ERF, SCT, LX 200, C5, C14, DayStar, Filters

White Light Energy Rejection Category: Energy Rejection Filters
Posted on Apr 20, 2011, 10:29 pm Author: Jen Winter
White Light filters cannot be used for Energy Rejection
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Tagged Keywords: transmission, white light, daystar, filter, ERF, prefilter

UV/IR Cut Filter application for Refractors Category: Energy Rejection Filters
Posted on Apr 20, 2011, 10:40 pm Author: Jen Winter
Certain Refractor Telescopes may consider use of the rear mounted UV/IR c ut filter for means of energy rejection.
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Tagged Keywords: refractor, prefilter, ERF, UV/IR, filter, cut, daystar, energy rejection

Reaching F/30 with a Refractor Category: Reaching F/30
Posted on Apr 23, 2011, 12:25 am Author: Jen Winter
Reaching F/30 can be easily done on any refractor
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Tagged Keywords: Observing, Solar, telecentric, 2X, DayStar, Powermate, ERF, Aperture, Reduction, Stop down, mask, barlow, 4X

Yellow ERF Glass Category: Energy Rejection Filters
Posted on May 1, 2011, 11:12 pm Author: Jen Winter
You may have Yellow Glass in your Energy Rejection Filter
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Tagged Keywords: rejection, Energy, RG610, colored, glass, red, yellow, ERF

How to configure a DayStar on a refractor Category: Configuring Your DayStar Filter
Posted on Jun 27, 2012, 11:57 am Author: Jen Winter
Refractor owners may choose between the front mount ERF and the rear mounted ERF.
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Tagged Keywords: Rejection, UV/IR, Configuration, Refractor, mount, ERF

Energy Rejection for QUARK - UV/IR or Front mount? Category: QUARKS
Posted on Sep 22, 2017, 12:52 pm Author: Jen Winter - Owner
Which kind of Energy rejection do I need? Can I use a UV/IR cut filter or do I need a front mount ERF? We will help explain the differences.
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Tagged Keywords: ERF, front mount, UV/IR Cut, ERF Filter

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