The Heliopan Bay 60 RG 715 (88A) Infrared Filter corresponds to a Wratten 88A 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 60 RG 715 (88A) 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 715nm 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 715nm or Above Can Pass    Blocks Near-IR, Visible, and UV Light    ~120x Filter Factor, ~7 Stop    Schott Glass Construction    Multi-Coated    Bay 60 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 715nm to pass through
• Effective for infrared films or other media sensitive to infrared wavelengths 715nm 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 120x reduces exposure by about 7 stops
• Brass filter ring helps to prevent jamming and provides additional strength
• Bay 60 front mount allows use with other filters
• Plastic case for storage and transport

Related Questions and Answers

Q: 1. If I create a RAID 5 with SoftRAID on a Mac, can I later use those disks in a different bay like the QNAP TR-004?

A: Migrating drives from the OWC ThunderBay 4 56TB 4-Bay Thunderbolt 3 RAID 5 Array (4 x 14TB) to another enclosure is not recommended, and functionality cannot be guaranteed.

Q: 2. Does it come with Thunderbolt 3 cable? How noisy is it?

A: It does come with a cable. We do not have a noise measurement, but the fan does have to move a lot of air to keep the drives cool, so they are not silent.

Q: 3. Does it work with windows ?

A: The ThunderBay 4 is not supported on a Windows computer. Please note that it is also not supported in Windows when running on a Mac in BootCamp.

Q: 4. I had an iMac with Thunderbolt 2 inputs, now I have a 16in MacBook Pro with USB-C / Thunderbolt 3 inputs. I cannot seem to find an adapter to connect this unit to my MBP. What cable do I need? Please provide a link.

A: You would use B&H item: Apple Thunderbolt 3 Male to Thunderbolt 2 Female Adapter this is a bi-directional adapter for data transfer going to a thunderbolt 2 cable.

Q: 5. Does this enclosure support Samsung 870 EVO SATA III SSD's?

A: Yes, this OWC ThunderBay 4 mini 4-Bay Thunderbolt 3 RAID Array and Drive Enclosure does support Samsung 870 EVO SATA III SSDs.

Q: 6. I have a Promise Pegasus 16TB 4 bay Thunderbolt 3 Raid 5. OK to daisychain OWC Thunderbay 4 16 TB 4-bay thunderbolt 3 raid 5?

A: Yes, it is compatible to daisy-chain any Thunderbolt device.

Q: 7. What is the difference between the 20tb and 16tb. Seems to be a jump in speed from roughly 500mb/sec to 1000mb/sec is this true in a raid 5?

A: I just looked at the benchmarks for the 20TB model, and I do not see anything that suggests 1000MB/sec performance under any circumstance. Both of these should be in the mid 500MB/sec range in RAID 5.

Q: 8. Is this unit compatible with Mac OS Big Sur and Monterey?

A: Yes, the OWC ThunderBay 4 72TB 4-Bay Thunderbolt 3 RAID 5 Array is fully compatible with MacOS Big Sur and Monterey.

Q: 9. What version of softraid XT currently ships with these drives?

A: Unfortunately it is not specified what version it comes with. I apologize.

Q: 10. What hard drives come pre installed in this configuration?

A: The OWC / Other World Computing ThunderBay 4 24TB 4-Bay Thunderbolt 2 RAID Array (4 x 6TB, RAID 5 Edition) B&H # OWT424 ships with 4 Toshiba 6TB Model MD04ACA600.