$150 - $200

WD-27508-28 Cole-Parmer® pH Electrode Refillable Single-junction for Orion A Series by Oakton

Epoxy-body pH electrodes compatible with Orion A-Series meters.

93669 Nebula Filter for Celestron Origin by Celestron

• Get the Most Out of Your Origin: Enhance your Celestron Origin's views and images of nebulae—especially from urban and suburban skies. This filter blocks light pollution, boosts image contrast, and darkens the sky background for noticeably better images.
• Nebulae Come to Life: This filter transmits only the key Hα-Hβ-OIII wavelengths from emission nebulae, making their colors "pop" from the dark background.
• Conquers Light Pollution: With this filter, you allow the "good" wavelengths of light from nebulae through but block the "bad" light pollution from reaching Origin's sensor.
• Built for Origin's RASA Optics: Unlike similar filters with narrower bandpasses, this filter was engineered specifically to work with Origin's fast f/2.2 optics to allow more of the light you want while suppressing the light you don't.
• Easy Installation: Simply remove the optical window from Origin's filter drawer and insert the Nebula Filter. It won't disrupt the optical path of your Origin, and no additional adapters are needed.
• Quality Construction: Constructed of Schott glass with anti-reflective coatings, this filter's surfaces are optically flat and free from defects.

4715 VIS2xx/VIS3xx Battery by Wohler

Additonal Information

• 12 V NiMh 2600 mAh
• operation time: 120 min
• warranty: 1 year

24" OSHA Set

8-3050 900 LM, 50' Cord, 45" Long Lamp by Pelsue

PelBrite work lights are rugged and shock protected against dropping or falling, and are precision engineered from nonbreakable, non-combustible materials. Designed for dependable service under extreme conditions. Cool to the touch, easy on the eyes, and color corrected (when fluorescent). LED Lamps are solid state and extra resistant to damage, they also feature lower power requirements and have a much longer lifespan than fluorescent bulbs. Available in 120 VAC. Standard lamps are 8, 15, 18, and 20 watt and come with either 25 or 50 foot cords.

*Please note we can only ship RKI products to customers within the United States