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ZWO OIII 7nm Narrowband Filters, Mark II

£134.00
(Inc. 20% VAT)
Loyalty Points: 134
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Product Code
Z260-OIII7nm1.25MkII
Brand
Email us a question about this ProductZWO

ZWO offers 2 Year Warranty for all Products bought new

Description

The ZWO OIII 7nm narrowband filter is designed for nebula observation allowing 7nm bandwidth of light centered on a wavelength of 500nm, which corresponds to OIII emission lines, blocking out all other light.  Adding the ZWO OIII narrowband filter to your imaging collection will help you go beyond the RGB imaging and will help capture your favorite nebulae in a totally new light, no matter how polluted your skies may be! Combine it with H-alpha and SII narrowband filters (SHO Set) for tricolor CCD astrophotography or use it with a H-alpha filter to create bicolor images.

Narrowband filters are used to create high contrast deep sky images of certain objects, mainly emission and diffuse nebulae (i.e. Veil Nebula, M42 Orion Nebula, North America Nebula, Horsehead Nebula) or planetary nebulae (i.e. M27 Dumbbell nebula, M57 Ring Nebula, Helix Nebula), just to mention few of well known nebulosities. Narroband filters are sometimes used instead of LRGB filter sets and sometimes in combination with them...However, if you don't yet want to commit to full narrowband H-S-O imaging, you might just buy them one-by-one and still be able to use them, i.e. a OIII filter could be used together with a H-alpha for bicolor astrophotography for certain deep sky objects, usually nebulosities...

Some amateur astronomers would use narrowband filters when the Moon is out or if they live in heavily light polluted areas as these filters would practically eliminate the effects of light pollution as a side effect. By applying longer exposure time you will increase the brightness of the nebulosity whilst stars will still apear much fainter (thus smaller and sharper) than if they were imaged with LRGB filters. The sky's background will also stay darker hence contrast will be increased.

We would recommend to use narrowband filters with fast imaging telescopes with f/8 and faster focal ratio.

Specifications

Specifications: ZWO OIII 7nm Narrowband Filters, Mark II

Fine-optically polished to ensure accurate 1/4 wavefront over both surfaces
FWHM_¦_7 “Ï 0.5nm
Thickness of glass: 1.9mm “Ï 0.03mm
Total Thickness: 9mm = 5.5mm + 3.5mm (thread)
Optical Length: 5.5mm

What's in the Box

What's in the Box: ZWO OIII 7nm Narrowband Filters, Mark II

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Delivery

At The Widescreen Centre, we prioritize prompt order processing and dispatch. We strive to dispatch all orders on the same day or the next working day, depending on the time of your order. We hold extensive stocks to ensure that your items are ready for immediate despatch. Please note that the cut-off time for same-day dispatch is usually 1:30 p.m.

For delivery within Mainland UK, we use reputable couriers to provide efficient service. You can expect your package to arrive in 1-2 working days. Please note that a signature may be required upon delivery to ensure a secure receipt.

In the case of special order items, the delivery time may be longer. If you have any concerns or questions about the delivery of your item, please don't hesitate to Contact Us. We are here to assist you.

Should there be any delay in dispatching your order, we will notify you to keep you informed.

Please be aware that The Widescreen Centre cannot be held responsible for any postal or third-party delays that may occur. We are committed to providing a reliable and efficient delivery service for our valued customers.

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