Improving your visibility of deep sky objects during nighttime, the Explore Scientific 2" CLS Nebula Filter for Astrophotographyfrom Explore Scientific 2" CLS Nebula Filter for Astrophotographyincreases the contrast between the night sky and astronomical objects. Ideal for visual observation and astrophotography applications under light-polluted skies, this filter features a wider transmission curve than a UHC filter and helps to brighten the appearance of stars and other phenomena by reducing light pollution wavelengths. It is designed for 2"-diameter telescope eyepieces and viewing accessories.

Increased Contrast for Nighttime Viewing    Wider Transmission Curve than UHC Filter    Passes 436-536nm, 98.3% Transmittance    Ideal for Astrophotography

Related Questions and Answers

Q: 1. Will it work with Meade ETX 125

A: Yes it is compatible with the Meade ETX 125.

Q: 2. Will this work with my Lunt 152mm ED APO f/8 which has a 3 inch Feather Touch focuser?

A: Yes, the ES 0.7x Reducer should work reasonably well with a 3 inch focuser. There are three options for attaching the reducer to a focuser, a 3 inch adapter and two smaller adapters. The upper left cylinder in the product photo is for a 3 inch focuser. It has a 76mm outside diameter and 74mm ID with female threads. The 3 inch adapter screws on to the bottom (scope side) of the reducer. It appears to be designed to either be inserted into the focuser tube or screwed on, depending on your setup. I use it with a 127mm f/7.5 APO and it covers a full frame (35mm) sensor with sharp stars, but with some vignetting in the corners. Two issues I have with the reducer are 1) the T adpater is standard 42mm, as opposed to 48mm, and so produces more vignetting than is necessary given its 3 inch optics. 2) Given the 55mm T adapter shoulder to sensor plane recommendation, there are no 48mm threads or room for a screw in filter. I just ordered and adapter that will allow for screw in filters on the focuser end of the reducer.Hope this helps.

Q: 3. Is this a Bird Jones design?

A: Explore Scientific does not indicate if the Explore Scientific FirstLight 114mm f/4.3 Reflector Telescope BH #EXFLN114NT • MFR #FL-N114500TN has a spherical primary mirror in place of a parabolic one, with spherical aberrations corrected by sub-aperture corrector lens usually mounted inside the focusser tube or in front of the secondary mirror.

Q: 4. Does the primary mirror have a center spot?

A: Unfortunately no, it does not have a center dot for collimation.

Q: 5. Can i know Explore Scientific 8x56 G600 ED Binoculars weight

A: The Explore Scientific 8x56 G600 ED Binoculars weigh 2 pounds.

Q: 6. What is country of Origin?

A: The country of origin for the Explore Scientific 82° Series 30mm Eyepiece (2") BH #EXEPWP823001 • MFR #EPWP8230-01 is China.

Q: 7. Can a step motor be added to this mount to motorize it...???

A: None can be added to this mount.

Q: 8. Will this work with an Evostar 72 APO refractor?

A: Yes, the Explore Scientific Field Flattener for f/5 to f/7 Refractors is compatible with the Sky-Watcher Evostar ED APO 72mm f/5.8 Refractor.

Q: 9. What is needed to mount this telescope on a RRS series 4 tripod?

A: The Explore Scientific FirstLight 254mm f/5 Dobsonian Telescope is about 11 inches in diameter, 65 inches tall and weighs about 50 pounds. It cannot be used on a tripod.

Q: 10. Will this [safely] fit a 130mm (5.1") reflector?

A: This is made for 127mm Telescopes I do not believe this will work with a 130mm Scope. My apologies.