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TS-Optics 2" Energy Rejection Filter with M48x0.75 screw-in thread

Name: TS-Optics 2" Energy Rejection Filter with M48x0.75 screw-in thread
Brand: -TS Zubehör
SKU: ERF2
Price: 155 EUR
Rating: 5 (1 reviews)

This filter fits into the 2" filter thread and rejects solar energy.

Reduces the thermal load on the first filter of e.g. the Quark and the filter holder

Blocks UV and IR

Image quality is preserved

Based on reflection rather than absorption, so does not heat up

Can be used as a red filter to reduce the influence of seeing in lunar photography

Note: the picture shows the 1.25" model

Manufacturer: -TS Zubehör

Product number: ERF2

EUR 155,00

incl. 19 % VAT (DE)

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excl. 6.95 € shipping costs (DE)

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rating: 5.0 of 5

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TS-Optics 2" Energy Rejection Filter with M48x0.75 screw-in thread

This filter fits into the 2" filter thread and rejects solar energy.

Reduces the thermal load on the first filter of e.g. the Quark and the filter holder

Blocks UV and IR

Image quality is preserved

Based on reflection rather than absorption, so does not heat up

Can be used as a red filter to reduce the influence of seeing in lunar photography

Note: the picture shows the 1.25" model

Details..
Technical data..
In the box..
Manufacturer infos..
Safety informations..

TS-Optics 2" Energy Rejection Filter

This filter is an assistant filter for H-alpha attachments like Quark Chromosphere, which rejects energy and extends the lifetime of your Daystar Quark filter.

It can be used on 5" or smaller refractors.

Why add an ERF?

The filters of the H-alpha attachment can heat up, thus the lifetime is reduced. With this ERF filter, you can protect both the filter and the filter holder from high temperatures.

And don´t worry about the ERF itself, it uses B270 optical glass and multiple coating, so it reflects most of the energy, not absorbs it.

Does it have any other uses?

Yes, this ERF filter can also be used for lunar imaging. It provides an even brighter image than an IR685 filter while reducing the effect of seeing.

Blocking depth:	OD2 (off-band between 300 nm and 1100 nm)
Transmittance:	≈99% (on-band)
Substrate:	High-quality optical glass B270
Substrate thickness:	2 mm
PV:	1/4 lambda
Coating:	Multi-layer composite coating
Cell:	2 inch, thread M48.5*0.75
Cell thickness:	Body 5 mm + thread 2 mm, a total of 7 mm

Filter

Protective box

Manufacturer / Importeur:	Teleskop-Service Ransburg GmbH
Street:	Von-Myra-Str. 8
ZIP / City:	85599 Parsdorf
Country:	Germany
Telefon number:	+49 89 99228750
Email:	info@teleskop-service.de
Website:	www.teleskop-express.de