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BLACK FRIDAY 2022

We were initially going to do a sale on monoculars but said 'fuck it, let's just send it', so it's $300 on our Photonis Echo and Echo+ monoculars and $400 off binoculars. CH/PVS-14 Standard, Plus, and Pros, and Katanas, RNVGs, DTNVS, Protons, whatever. Exclusions: Consignment devices; bundles;  Cannot be combined with any other coupon codes or promotional programs. Sale ends Monday November 28 at 11:59pm EDT SHOP SALEhttps://coldharboursupply.com/collections/black-friday-2022 

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Echo, Echo+, 4G and 4G+

Continuing to push the boundaries of performance and value, Cold Harbour Supply is proud to announce that in addition to our industry-leading Echo builds, we will start to offer Echo+ intensifiers in our complete devices. The difference between Echo and Echo+ is simply the FOM rating. Echo intensifiers have FOM figures between 1600-2000, while Echo+ are 2000+.  So functionally, what does 2000+ FOM potentially get you? As one of our blog posts pointed out, FOM is simply the product of Centre Resolution x Signal-to-Noise Ratio. This means that by guaranteeing a higher baseline FOM rating, you would be able to access either higher Resolution, or higher SNR, or potentially both. While standard Echo intensifiers hold their own and yield a very...

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Lightweight RPO Lenses vs US Milspec - READ BEFORE YOU BUY

The latest fad sweeping the night vision industry are lightweight optics. While nothing new (the NV Devices BNVD-UL has been sporting RPO lightweight optics since 2019), this concept has seen recent resurgence. Lightweight optics promise a reduction in operator fatigue by reducing overall system weight, but this reduction in weight comes at the expense of some optical trade-offs. This is a follow-up discussion to the YouTube video published in Q2 2022 In the following series of images, we demonstrate some of these trade-offs in a side-by-side comparison between US Milspec optics and RPO 2.0 and the latest 3.0 using tightly-controlled testing conditions to remove bias, and user subjectivity. The test setup: Sony A7S3 with custom PVS-14 lens adapter attached to...

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Lead Times - Q3 2022

The lead times for night vision systems are constantly being updated based on the orders received relative to planned and confirmed intensifier shipments. Cold Harbour Supply Inc. receives finite, periodic, scheduled shipments of intensifiers. Therefore, if all of the intensifiers in a shipment are all allocated, then the delivery date for new orders will also shift. As a simple example - Let's say we have 50 intensifiers arriving on or prior to October 20th, with another 50 arriving on November 10th. We will accept orders until all 50 intensifiers are allocated, and each system is completed as the intensifiers are received (we sometimes receive split shipments of intensifiers). Once the October 20th allocation is filled, the November 10th allocation is...

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What is FOM? And why it's not important

In the last 5 years, the NV world seems to be caught up with "FOM-Fever" and while FOM does offer some useable information to aid in a purchasing decision, it was actually only developed by government agencies as a way to determine import/exportability of tubes. The actual definition of Figure of Merit (FOM) is the product of Signal-to-Noise Ratio (commonly expressed as SNR) multiplied by Centre Resolution (in line-pairs per millimeter)⠀⠀⠀⠀⠀⠀ FOM = SNR x Resolution⠀⠀ The reason why FOM doesn't matter, especially when SNR and Res is available is because you can have a tube that has a very high SNR, and low Res, up against a tube that has a low SNR and high Res, and both could...

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