The Heliopan Bay 2 RG 695 (89B) Infrared Filter corresponds to a Wratten 89B filter is designed to help capture images of how a subject reflects or transmits infrared light.

Infrared light waves occupy the space in the electromagnetic spectrum behind visible light due to their longer wavelengths. Many surfaces and materials react to, or emit infrared light waves differently than visible light waves, which provide the potential for photographs of subjects or subject properties that are otherwise invisible to the human eye. Such images require an infrared-sensitive medium such as infrared film or a digital photographic sensor which may be more effective when used without the infrared-blocking filters that are frequently built over them.

Conventional light sources such as the sun, photographic strobes, or incandescent lighting may be used to provide infrared illumination. However, because infrared films or digital photographic sensors can be more sensitive to the relatively higher energy and shorter-wavelength visible light those sources also emit, the effects of infrared light can be otherwise obscured. The Heliopan Bay 2 RG 695 (89B) Infrared Filter makes it possible to capture images of how subjects are illuminated by infrared light by blocking near-infrared, visible, and ultraviolet light waves while allowing 90% of infrared light waves 695nm or greater into the lens it is mounted onto.

This filter is constructed from Schott glass for increased optical clarity and features a brass filter ring for durability and jamming prevention.

For Infrared Images    90% of IR 695nm or Above Can Pass    Blocks Near-IR, Visible, and UV Light    ~60x Filter Factor, ~6 Stops    Schott Glass Construction    Multi-Coated    Bay 2 Front Filter Mount    Brass Filter Ring    Plastic Case

• Designed for use with infrared film or digital camera sensors by filtering out near-infrared, visible, and ultraviolet light
• Allows 90% of infrared light waves beginning at 695nm to pass through
• Effective for infrared films or other media sensitive to infrared wavelengths 695nm or above
• Constructed from Schott glass for optical clarity
• Each glass surface includes four layers of anti-reflection coating to prevent internal ghosting and reflections
• Filter factor of approximately 60x reduces exposure by about 6 stops
• Brass filter ring helps to prevent jamming and provides additional strength
• Bay 2 front mount allows use with other filters
• Plastic case for storage and transport

Related Questions and Answers

Q: 1. Which make/model drives come with this unit? I would like to know so that I can buy back up drives along with this unit incase one of them fails. Any recommendations for replacement drives? Thank you!

A: It is Toshiba 4tb

Q: 2. Does this require Synology HDD's?? Or can I use a 3rd party like Iron Wolf?

A: You can fill this Synology DiskStation DS1823xs+ 8-Bay NAS Enclosure with Synology's drives, or other 3.5mm drives such as the Seagate IronWolf Pro, or WD Red Pro drives.

Q: 3. Does the SoftRAID software run on an iMac?

A: Yes, SoftRAID runs on a Mac. I've been using it since Apple stopped including raid in DiskUtility

Q: 4. Can this OWC enclosure handle 4x 10TB hard drives?

A: Yes, the OWC ThunderBay 4 0TB 4-Drive HDD Storage Enclosure with Dual Thunderbolt 3 Ports BH #OWCTB3IVKIT0 can handle 4 x 10TB drives.

Q: 5. Is it possible to JBOD with the Thunder Bay 4?

A: Yes. That's all i do with it. You can buy without the soft raid i think.

Q: 6. How much cost the software for a Raid 1+0?

A: The included software can be used to reconfigure this into a 1+0 volume. No need for any additional software purchase.

Q: 7. How much does it cost to How much does it cost to upgrade to "SoftRaid" software to do all RAID configurations?

A: SoftRAID Software would be included with this product.

Q: 8. what is the warranty for this device (box AND drives)?

A: This product has a Limited 3-Year Warranty.

Q: 9. how do u check raid in this for bad sectors? i usually run apple disk utility and secure erase 2x on individ drives but what about RAIDS? i no see option for that on apple DUtility.

A: Apple Disk Utility should not be used with the OWC ThunderBay 4 4-Bay Thunderbolt 3 RAID Enclosure. You would need to use the free SoftRaid software to manage and maintain the unit.

Q: 10. If a drive fails, can a user replace the drive and will it automatically bring it back in synch (assuming SoftRaid 5)?

A: Depending on the mechanism for RAID rebuild, yes, a user can replace the drive. Please be sure to consult the user guide/manual for the drive replacement and RAID rebuild procedure. Procedures can vary from RAID level used to manufacturer.